A coding and modulation apparatus and method are presented. The apparatus comprises an encoder that encodes input data into cell words, and a modulator that modulates said cell words into constellation values of a non-uniform constellation. The modulator is configured to use, based on the total number M of constellation points of the constellation and the signal-to-noise ratio SNR in dB, a non-uniform constellation from a group of constellations comprising one or more of predetermined constellations defined by the constellation position vector w 0 . . . b-1 , wherein b=M/4.

Description

15 parts

›CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. application Ser. No. 17/184,208, filed Feb. 24, 2021, which is a continuation of U.S. application Ser. No. 16/447,589, filed Jun. 20, 2019, which is a continuation of U.S. application Ser. No. 15/899,501, filed Feb. 20, 2018, which is a continuation of U.S. application Ser. No. 14/786,725, filed Oct. 23, 2015 (now U.S. Pat. No. 9,906,396), which is a National Stage of International Application No. PCT/EP2014/058719, filed Apr. 29, 2014, and claims priority to European Application No. 13166018.5, filed Apr. 30, 2013, the entire contents of each of which are incorporated herein by reference.

BACKGROUND

›Field Of The Disclosure

The present disclosure relates to a coding and modulation apparatus and method. Further, the present disclosure relates to a transmission apparatus and method. Still further, the present disclosure relates to a computer program and a non-transitory computer-readable recording medium.

›Description of Related Art

Modern communications systems typically employ, among other elements, a coding and modulation apparatus (as part of a transmission apparatus) and a decoding and demodulation apparatus (as part of a receiving apparatus). The coding and modulation apparatus is often part of a so called BICM (Bit Interleaved Coded Modulation) apparatus, which generally comprises (at the transmitter side) a serial concatenation of a FEC (Forward Error Correction) encoder, a bit interleaver, and a modulator, which uses spectral efficient modulation such as multilevel PAM (Pulse Amplitude Modulation), PSK (Phase Shift Keying), or QAM (Quadrature Amplitude Modulation). It should be noted that hereinafter, whenever QAM is mentioned it should be understood as a generally term covering PAM, PSK and QAM.

BICM allows for good performance over both non-fading and fading channels due to the use of the interleaver and/or the FEC encoder. It has a reasonable decoding complexity as opposed to multilevel coding (MLC) coding schemes and is thus used frequently in communications systems, such as in all DVB systems, powerline communications (e.g., Homeplug AV, DAB, LTE, WiFi, etc.).

Generally, the coding and modulation capacity, such as the BICM capacity in systems using a BICM apparatus, is considered as a target function, and it is desired to find optimum constellation points such that this capacity is maximized, often subject to a power normalization, i.e., the average power of the constellation points should be normalized to e.g. 1.

The “background” description provided herein is for the purpose of generally presenting the context of the disclosure. Work of the presently named inventor(s), to the extent it is described in this background section, as well as aspects of the description which may not otherwise qualify as prior art at the time of filing, are neither expressly or impliedly admitted as prior art against the present disclosure.

›SUMMARY · 1 of 2

It is an object to provide a coding and modulation apparatus and method providing an increased or even maximized coding and modulation capacity. It is a further object to provide a demodulation and decoding apparatus and method as well as a corresponding computer program for implementing said methods and a non-transitory computer-readable recording medium for implementing said methods.

According to an aspect there is provided a coding and modulation apparatus comprising

an encoder that encodes input data into cell words, and a modulator that modulates said cell words into constellation values of a non-uniform constellation, wherein said modulator is configured to use, based on the total number M of constellation points of the constellation and the signal-to-noise ratio SNR in dB, a non-uniform constellation from a group of constellations comprising one or more of the following constellations, wherein the constellation points of the different quadrants of a constellation are defined by a constellation position vector w 0 . . . b-1 , wherein b=M/4, wherein the constellation points x 0 . . . b-1 of a first quadrant are defined as x 0 . . . b-1 =w 0 . . . b-1 , the constellation points x b . . . 2b-1 of a second quadrant are defined as x b . . . 2b-1 =conj(w 0 . . . b-1 ), the constellation points x 3b . . . 4b-1 of a third quadrant are defined as x 3b . . . 4b-1 =−w 0 . . . b-1 , the constellation points x 2b . . . 3b-1 of a fourth quadrant are defined as x 2b . . . 3b-1 =−conj(w 0 . . . b-1 ), wherein conj is the complex conjugate, and wherein the constellation position vectors of the different constellations of the group of constellations are defined in claim 1 .

According to a further aspect there is provided a transmission apparatus comprising

a coding and modulation apparatus as proposed herein that encodes and modulates input data into constellation values, a converter that converts said constellation values into one or more transmission streams to be transmitted, and a transmitter that transmits said one or more transmission streams.

According to still further aspects corresponding methods, a computer program comprising program means for causing a computer to carry out the steps of the coding and modulation method disclosed herein, when said computer program is carried out on a computer, as well as a non-transitory computer-readable recording medium that stores therein a computer program product, which, when executed by a processor, causes the coding and modulation method disclosed herein to be performed are provided.

Preferred embodiments are defined in the dependent claims. It shall be understood that the claimed methods, the claimed computer program and the claimed computer-readable recording medium have similar and/or identical preferred embodiments as the claimed apparatus and as defined in the dependent claims.

One of the aspects of the disclosure is that the constellation points of the used constellations are not located on a regular grid with equidistant symbols, but rather on optimized locations, dependent on the channel characteristics, e.g., channel transition probabilities due to AWGN (Additive White Gaussian Noise), fading, etc. Further, the used constellation is selected (preferably in advance, but generally on the fly in other embodiments) dependent on the SNR (signal-to-noise ratio) and the desired total number of constellation points of the used constellation. A method how to find and optimize these non-uniform constellations (in the following called NUCs) will be explained below.

It should be noted that to every M-QAM, one can also think of the underlying sqrt(M)-PAM. Further, it should be noted that in other aspects the group of constellations defined in the claims comprises less constellations, e.g. only constellations for non-fading channels, only constellations for fading channels, only constellations for selected values of M, only constellation for M-QAM or sqrt(M)-PAM and/or constellations for less SNR values. In other words, less constellations may be contained in the group of constellations available for selection and subsequent use by the modulator, i.e. the group of constellations available for use by the modulator may comprise one or more of the constellations defined in the claims. Accordingly, the present disclosure is also directed to a coding and modulation apparatus and method that have a smaller group of constellations available for use (as explained above) and/or where less constellations are available for a particular value of M.

A QAM mapping consisting of M constellation points is denoted as M-QAM. If a (uniform or non-uniform) QAM allows separate encoding and decoding of each of its two dimensions (“inphase” and “quadrature phase” in the literature), then this QAM will be called a N 2 -QAM. This implies that the constellation can be designed by two N-PAM constellations, one for each dimension. N 2 -QAMs have significantly lower decoding complexity for ML-decoding, as only N constellation points have to be investigated, compared with N 2 points for the M-QAM, when M=N 2 , but when the two dimensions cannot be separated (as is usually the case for N-PSK, e.g. 8-PSK, where 8 points are located on a unit circle). In addition QAM constellations that are completely defined by a single quadrant of the constellation will be called Q-QAM, with the other quadrants being derived from the first quadrant. E.g. normal uniform square QAM constellations (UC) are also Q-QAM constellations, due to their symmetry.

However, the constellation points of the QAM constellations considered in this disclosure are not located on a regular grid with equidistant symbols, but rather on optimized locations, dependent on the channel characteristics, e.g., channel transition probabilities due to AWGN, fading, etc.

It should be noted that the constellation position vector w as defined in the claims must not necessarily contain the constellation points of the first quadrant of the constellation, but could also contain the constellation points of any of the four quadrants (expressed by the definition “of a first quadrant” in the claims). Due to the quadrant symmetry this leads to constellations with a different bit mapping but with identical performance. The constellation position vector w in the tables defined herein should therefore be considered as an example for all four symmetric constellations with different bit mapping but identical performance.

›SUMMARY · 2 of 2

It is to be understood that both the foregoing general description of the disclosure and the following detailed description are exemplary, but are not restrictive, of the disclosure.

›BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the disclosure and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:

FIG. 1 shows an embodiment of a coding and modulation apparatus according to the present disclosure,

FIG. 2 shows an embodiment of a transmission apparatus according to the present disclosure,

FIG. 3 shows an embodiment of a communications system according to the present disclosure,

FIGS. 4 A and 4 B show a regular 4-QAM constellation as a simple example for a constellation,

FIGS. 5 A and 5 B show diagrams depicting the integrant of the 1-dimensional BICM capacity function at 10 dB and at 30 dB SNR,

FIGS. 6 A and 6 B show a 8-PAM non-uniform constellation and a 64-QAM non-uniform constellation,

FIG. 7 shows a constellation for a 64-QAM non-uniform constellation generally defining the constellation points,

FIG. 8 shows a diagram illustrating the performance of non-uniform 16-QQAM, 32-QQAM, 64-QQAM, 256-QQAM and 1024-QQAM constellations compared to non-uniform N 2 -QAM constellations, and

FIG. 9 shows a non-uniform 16-QQAM constellation.

›DESCRIPTION OF THE EMBODIMENTS · 1 of 8

Referring now to the drawings, wherein like reference numerals designate identical or corresponding parts throughout the several views, FIG. 1 shows an embodiment of a coding and modulation apparatus 10 according to the present disclosure. It comprises an encoder 11 that encodes input data into cell words, and a modulator 12 that modulates said cell words into constellation values of a non-uniform constellation. Said modulator 12 is configured to use, based on the total number M of constellation points of the constellation and the signal-to-noise ratio SNR in dB (and, in some embodiments, the channel characteristics), a non-uniform constellation from a group of constellations comprising predetermined constellations, wherein the constellation points of the different quadrants of a constellation are defined by a constellation position vector w 0 . . . b-1 , wherein b=M/4, wherein

the constellation points x 0 . . . b-1 of a first quadrant are defined as x 0 . . . b-1 =w 0 . . . b-1 , the constellation points x b . . . 2b-1 of a second quadrant are defined as x b . . . 2b-1 =conj(w 0 . . . b-1 ), the constellation points x 3b . . . 4b-1 of a third quadrant are defined as x 3b . . . 4b-1 =−w 0 . . . b-1 , the constellation points x 2b . . . 3b-1 of a fourth quadrant are defined as x 2b . . . 3b-1 =−conj(w 0 . . . b-1 ), wherein conj is the complex conjugate, and wherein the constellation position vectors of the different constellations of the group of constellations will be derived and shown below.

In other embodiments of the coding and modulation apparatus 10 additional elements may be provided, such as a BCH encoder, an LCPC encoder, a bit interleaver and/or a demultiplexer (for demultiplexing bits of encoded data into the cell words). Some or all of these elements may separate elements or may be part of the encoder 11 . For instance, a BICM device as conventionally used in the transmission apparatus of a DVB system may be used as coding and modulation apparatus 10 .

FIG. 2 shows an embodiment of a transmission apparatus 20 according to the present disclosure comprising a coding and modulation apparatus 21 (referenced by 10 in FIG. 1 ) as proposed herein that encodes and modulates input data into constellation values, a converter 22 that converts said constellation values into one or more transmission streams to be transmitted, and a transmitter 23 that transmits said one or more transmission streams. In an exemplary embodiment the converter 22 may comprise one or more elements like atime, cell and/or frequency interleaver, a frame builder, an OFDM modulator, etc., as e.g. described in the various standards related to DVB. The constellations and the constellations values are generally predetermined and e.g. stored in a constellations storage 24 or retrieved from an external source.

In other embodiments of the transmission apparatus 20 addition elements may be provided, such as an input processing unit, a frame building unit and/or an OFDM generation unit as e.g. conventionally used in transmission apparatus of a DVB system.

FIG. 3 shows an embodiment of a communications system 30 according to the present disclosure comprising one (or more) transmission apparatus 20 (Tx) as shown in FIG. 2 and one or more receiving apparatus 40 , 40 ′ (Rx).

A receiving apparatus 40 generally comprises a receiver 41 that receives one or more transmission streams, a deconverter 42 that deconverts the received one or more transmission streams into constellation values, and a demodulation and decoding apparatus 43 that demodulates and decodes said constellation values into output data. The demodulation and decoding apparatus 43 generally comprises a demodulator 44 for demodulating constellation values of a non-uniform constellation into cell words, and a decoder 45 for decoding cell words into output data words, wherein based on the total number M of constellation points of the constellation, the signal-to-noise ratio in dB and the channel characteristics, a non-uniform constellation is selected from the group of constellations comprising the same predetermined constellations as used in the coding and modulation apparatus 10 .

The preferred demodulation and decoding considers soft values as opposed to hard decided values (0 and 1). Soft values represent the continuously distributed received values (possibly after A/D conversion including quantization) by more than two states (as in the case of binary (hard) decision). The reason is that for hard decision, the NUCs are generally not optimal. Nowadays, BICM receivers typically are soft receivers anyway.

Generally, data (e.g. communications data, broadcast data, etc.) shall be transmitted from a transmission apparatus 20 to one or more of said receiving apparatus 40 over a transmission channel 50 , 50 ′. The transmission channel 50 , 50 ′ can be unicast channel, multicast channel, a broadcast channel and may be employed as one-directional or bi-directional channel (i.e. having a return channel from the receiving apparatus to the transmission apparatus).

In an embodiment the modulator 12 is configured to use a non-uniform constellation based on the total number M of constellation points of the constellation, the required signal-to-noise ratio SNR for error free decoding in dB and the channel characteristics. In broadcasting applications the constellation is generally not selected dependent on the SNR in the receiver, but dependent on the SNR that is required for error free decoding with a used channel code (if a code is used, for example LDPC codes in case of DVB 2 nd generation transmission systems) for an expected channel characteristic, e.g., static reception or multi-path fading.

›DESCRIPTION OF THE EMBODIMENTS · 2 of 8

The total number M of constellation points is generally selected according to the desired payload throughput jointly with the code rate of the FEC encoder. The SNR for error free decoding for typical channel characteristic is generally known, e.g. by simulation. In broadcasting the channel characteristics of the receivers are not known, i.e. a compromise is selected. For instance, in broadcasting for each code rate of the FEC encoder one non-uniform constellation is selected, optimized for an SNR that is a compromise for all channel characteristics.

The transmitter generally targets a certain scenario. For instance, a broadcast transmission over cable or satellite considers the channel to be just a non-fading AWGN (appropriate channel model), while a terrestrial broadcaster typically considers the channel to be a fading channel, e.g. with Rayleigh distribution, as several echoes are usually received.

In another embodiment the modulator 12 is configured to adaptively select a non-uniform constellation based on the total number M of constellation points of the constellation, the signal-to-noise ratio SNR in dB and the channel characteristics, wherein said signal-to-noise ratio SNR in dB and channel characteristics are received from a receiving device 40 to which data shall be transmitted. Such an adaptive selection of the constellation is generally only possible with a return channel in unicast environments. A non-uniform constellation may be adapted e.g. in time and/or frequency domain, e.g. for different OFDM subcarriers.

Depending on the SNR the optimum value for M and the code rate of the FEC encoder can be selected, which offers the highest throughput (equivalent to C B ). In other words, for a large SNR a high value of M is selected leading to a high data throughput (and vice versa).

The channel characteristics describe the statistical properties of the channel, e.g., the extent of the multipath propagation of the transmission channel between transmitter and receiver. If the channel is characterized by no multipath propagation, corresponding to the AWGN channel, the required SNR for error free decoding is relatively low, i.e. the NUC has to be selected accordingly for optimum performance. If the transmission channel is characterized by strong multipath propagation, the required SNR for error free reception is larger compared to a channel without multipath propagation, i.e. a NUC optimized for higher SNR has to be used. Further, the NUCs should be optimized taking the fading characteristics into account, as will be discussed below.

As mentioned above, the number M of the constellation points of the constellations is selected according to the desired payload throughput. Larger values of M allow for higher data throughput, but require a larger SNR for error free reception. This is further influenced by the code rate of the FEC encoder, if any FEC encoder is used.

Another explanation (which is closely related to the optimization task) is that for each SNR, optimized constellations are proposed for different M. The optimization target is the BICM capacity. For an expected SNR, say 15 dB of SNR should be guaranteed, M is chosen, for which the respective optimized NUC yields the largest BICM capacity. As a general rule it holds that for low SNR a low value of M should be selected and vice versa. But from a theoretical point of view, it turns out that high M is generally optimum, e.g., choosing M=4096 or M=1024 is preferred, because even for low SNR, the optimized NUC will “look (almost) like” a constellation with effectively smaller M, as several points will overlap. However, modulation and demodulation complexity increase with increasing M, so a tradeoff has to be considered.

As mentioned above known communications systems often employ among other blocks a so called BICM apparatus which may also be used as coding and modulation apparatus according to the present disclosure. The maximum possible capacity over a BICM apparatus is described by the BICM capacity C B :

C B = ∑ i = 0 m - 1 E b , r k [ log 2 ⁢ ∑ x l ∈ 𝕏 b i p ⁡ ( r k ❘ s k = x l ) p ⁡ ( r k ) ] =   ∫ r k ∈ ℂ ∑ i = 0 m - 1 ∑ b = 0 1 ∑ x l ∈ 𝕏 b i 1 M ·   p ⁡ ( r k ❘ s k = x l ) ⁢ log 2 ⁢ ∑ x l ∈ 𝕏 b i p ⁡ ( r k ❘ s k = x l ) 1 M · Σ x l ′ ∈ 𝕏 ⁢ p ⁡ ( r k ❘ s k = x l ′ ) ⁢ d ⁢ r k , ( 1 )

where I denotes the i-th bit label of the constellation point, and m is the total number of bits/QAM symbol point. Altogether the QAM constellation consists of M=2 m constellation points, each assigned a particular bit label (00 . . . 00, 00 . . . 01, . . . , 11 . . . 11). In (1), E[.] denotes expectation operator, p(r k ) is the probability density function (pdf) of the received symbols, s k is the transmitted symbol according to a particular bit label, k is the discrete time (or subcarrier index in case of OFDM modulation), x 1 is a particular symbol of the set of all constellation symbols, this set being denoted by (=symbol alphabet, with cardinality M=2 m ).

p(r k |s k =x 1 ) is the likelihood function (transition probability—defined by the channel characteristics) that r k is received given the fact that s k =x 1 was transmitted. The subset b i , includes all symbols from , where the i-th bit label is b (either b=0 or b=1).

As seen in (1), C B is a 2-dimensional integral. If only constellations are considered that can be split into two 1-dim. PAM constellations, it is easy to see that

C B (2-dim.)=2× C B (1-dim.) (2)

All investigated channels here include AWGN (only or after the fading channel). This can be described by the signal-to-noise ratio SNR, typically in dB:

SN=10*log 10 ( E s /σ 2 ), (3)

where E s is the average symbol power of the QAM constellation (typically normalized to 1), and σ 2 is the variance (=power) of the additive white Gaussian noise (which is assumed to be of zero-mean).

In (2), the 1-dimensional consideration for C B (1-dim.) uses an N-PAM constellation, which has only half the symbol power, if just the projection on the in-phase or quadrature-phase, respectively, is taken. However, if again a power normalization to 1 is considered, the noise variance by a factor of 2 is increased. Thus, to be more precise, the target function for the optimization process considered is given by

›DESCRIPTION OF THE EMBODIMENTS · 3 of 8

C B (2-dim.at SNR x )=2× C B (1-dim. at SNR x/ 2), (4)

where the 1-dimensional PAM has normalized power 1, thus just half the SNR (here, in absolute values, i.e. not in dB) as explained above. The 1-dimensional BICM capacity is also computed according to (1), where the 2-dimensional integral becomes a 1-dimensional integral with r k ∈ , being the set of real numbers.

This equation (4) is optimized, given all degrees of freedom, namely the constellation points of the underlying 1-dim. constellation, subject to the power constraint, i.e.

For example, a regular 4-QAM consists of constellation points (e iπ/4 , e i7π/4 , e 3π/4 , e i5π/4 ), as can be seen in FIGS. 4 A and 4 B . The average symbol power is 1 (all symbols are located on unit circle here). The above symbol vector (e iπ/4 , e i7π/4 , e 3π/4 , e i5π/4 ) is to be understood such that the first entry (e iπ/4 ) belongs to the bit vector 00, the second entry (e i7π/4 ) to 01 and so on, i.e. the entries belong to bit vectors with increasing values, where the first bit position is the most significant bit (MSB) and the last one the least significant bit (LSB). This 4-QAM is a particular case of an N 2 -QAM, with N=2. Note that this definition (of being an N 2 QAM) does not only require N 2 being a square number (N 2 =2 2 ), but also that the constellation is symmetrical and can be described by two independent N-PAM constellations, here a 2-PAM: the in-phase component (real-part of the complex symbols) is a 2-PAM with symbol vector (1/sqrt(2), −1/sqrt(2)) and describes the 1 st bit of the 4-QAM, whereas the quadrature-phase component (imaginary-part of the complex symbols) is the same 2-PAM, this time describing the 2 nd bit of the 4-QAM. Note further that the decomposition of the N 2 -QAM into two N-PAMs is only possible if the bit labeling is according to binary reflected Gray mapping, which is typically applied (e.g. in DVB-systems).

The above example can be extended to higher order N 2 -QAMs, with N>2. Then the underlying N-PAM describes for one component the 1 st , 3 rd , 5 th and so on bit label, while for the other component it describes the 2 nd , 4 th , 6 th and so on label.

Constellation shaping is generally known and has a long history. Only in recent years, constellations were investigated which maximize the BICM capacity C B . In [6], the authors propose an heuristic approach to maximize C B , by forcing the underlying PAM to approach a Gauss-like form (as is well known from Shannon's capacity theorem, the optimum constellation over the AWGN channel should have a Gaussian distribution; note that this means that there is an infinite number of continuously distributed input signals, having a Gaussian distribution, i.e., symbols with small power should occur more frequently than symbols with large power). There is no proof that this maximizes C B , indeed those NUCs designed according to this method do not maximize C B . The resulting NUCs are in general no N 2 NUCs, i.e., a 2-dimensional NUC was optimized, not the underlying PAM. However, in N. Muhammad, “Coding and modulation for spectral efficient transmission”, Ph.D. dissertation, Universität Stuttgart, Institut für Nachrichtenübertragung, Pfaffenwaldring 47, 70569 Stuttgart, Germany, June 2006, the first time constellations have been directly optimized with respect to the target function C B . For this method two differences to the current method occur:

M-NUCs were proposed for M=8, 16, and 32. No higher order NUCs were investigated, as the optimization becomes very time consuming and the optimization algorithms became numerically unstable. The optimization algorithm was a hand-written gradient search algorithm, where both the BICM capacity and the gradient thereof consisted of improper integrals. No special care about either the numerical solution of the improper integral or the problematic integrants was considered. This consideration of these two issues is fundamental to obtain results for high order constellations, such as 1 k (i.e. 1024) NUC.

As described above, two problems arise when solving the optimization:

a) improper integral: integration border selection; and b) integrant.

With respect to problem a) (improper integral: integration border selection), as seen in eq. (1), the BICM capacity involves an integral from −infinity to +infinity (=improper integral). Any numerical solution of this integral has to consider finite integration borders such as from −b to +b, with b sufficiently large. Matlab provides several functions for numerical integration, even for improper integrals, such as the function “quad”, which internally optimizes the appropriate integration borders b. However, it has been observed that even these functions yield numerical instabilities and do not end up with the correct integral.

It can be observed that the integrant in (1) approaches 0 if the variable r k is sufficiently large (b→Inf). So a naïve approach would be to stepwise increase the variable r k , until the integrant falls below a certain threshold (say 10 −300 or if it even becomes exactly 0) and chose this value for the integration border b. However, it has further been observed that the integrant can take on very small values even before it converges to 0 for large variables, as can be seen in the two examples depicted in FIGS. 5 A and 5 B : the plot shown in FIG. 5 B is the integrant of the 1-dimensional BICM capacity function, if a regular 32-PAM is used, at 10 dB SNR, while the plot shown in FIG. 5 A 30 dB is considered.

Note that for 30 dB, many very small integrant values occur in the interval [−2,2] and any optimized integration border would be misleading in this interval. Thus, it is proposed to find the optimum (=numerically correct) integration border b as follows:

i) start with a large positive value S, iteratively reduce the value by decrements D, compute the integrant with this value as variable r k , until the first non-zero value of the integrant is computed. If no non-zero integrant can be found before r k =0, start again with a larger initial value S (say 10 times larger than before) and reduce D (say by factor of 10) to have a larger search interval and a finer granularity. ii) As this search is time consuming, it is proposed to adjust the initial value S and the decrement D according to the SNR. If σ 2 is the noise variance of the 1-dimensional mapping (see eq. (3)), then as a good compromise S=4000*σ 2 and D=50*σ 2 has been chosen.

›DESCRIPTION OF THE EMBODIMENTS · 4 of 8

With respect to problem b) (integrant) it has further been observed that the integrant of the BICM capacity integral can cause numerical instabilities for large SNR values. As can be seen in eq. (1), the integrant consists of sums, including terms such as

x*log(x), x*log(1/x), or x*1/log(x).

The value of x is e.g. the transition probability p(r k |s_k=x 1 ), or a pdf or includes parts thereof. The values of x become increasingly small (even approaching 0) if the SNR is very large, as the pdfs typically correspond to Gaussian distributions. Thus, the following limits might occur:

x*log(x), x*log(1/x), or lim {x→0} x*log(1/x), or lim {x→0} x*1/log(x).

Note that in theory, each limit converges to 0 (see l'Hospital's rule), but in a numerical computation, values such as + or −infinite or NaN (“not a number”) will occur. Thus, the following is proposed: during the computation of each element (i.e., each addend in the integrant of (1)), the value has to be checked if it is finite (otherwise infinite or NaN), and replace it by 0 in case it is not finite. Only this way, reliable integration results can be obtained.

The presented optimization is preferably based on the Matlab's fmincon function for constrained nonlinear optimization: the target function is the BICM capacity, the constraints are as follows:

all dof (degrees of freedom)>0; all dof need to fulfill the power normalization, when the N-PAM is created based on them; the dof must occur in increasing order.

The function fmincon requires an initial set of dof, where the values were taken from a regular, i.e. uniform constellation, but a random mutation was applied on them. It is to be noted that the resulting values should still be in increasing order, otherwise the Gray bit labeling is not fulfilled anymore. The NUCs will be described by their degrees of freedom, e.g., a 64-NUC optimized for the AWGN channel at SNR=11.5 dB yields the following values (optimized degrees of freedom):

2.2794 4.6229 7.5291.

This means that the positive constellation values are

1 2.2794 4.6229 7.5291

(the 1 was redundant, due to the power normalization, which will be applied in the end). The underlying 1-dim. 8-PAM NUC is thus described by the symbol vector

(1.6405 1.0073 0.2179 0.4967 −1.6405 −1.0073 −0.2179 −0.4967),

where the values are already normalized to unit average power.

As described before, the first entry (1.6405) corresponds to the bit label 000, the next one (1.0073) to 001 and so on. The 2-dim. 64-NUC is then obtained by symmetry, where both in-phase and quadrature-phase component of the NUC are based on the 8-PAM NUC.

FIGS. 6 A and 6 B depict both 8-PAM NUC ( FIG. 6 A ) and 64-QAM NUC ( FIG. 6 B ). The bit labels are given in integer numbers (000→0, 001→1, 010→2 and so on).

The creation of the 2-dim. NUC based on the optimized degrees of freedom will be explained in more detail below.

Since the performance of NUCs depends on the SNR value they are optimized for, a thorough selection is preferably carried out depending on the (FEC) code rate to achieve optimum performance. If the channel characteristics are known, the required SNR value for FEC convergence can be determined by simulation. Then the NUC that has been optimized for this SNR value is chosen for best performance. If the SNR at the receiver is lower than this SNR decoding threshold, the constellation is not optimal. However, this is no drawback, since the BICM capacity is too low for successful decoding anyhow. On the other hand if the SNR at the receiver is clearly higher than the decoding threshold, a sufficient amount of BICM capacity for successful decoding is available, even though the NUC is suboptimal for this SNR range. Therefore, the NUC needs to be optimized for the SNR value at the waterfall region (i.e., decoding threshold for (quasi-) error free decoding) of the FEC. As the SNR value of the waterfall region depends on the code rate of the FEC, a different NUC is selected for each code rate.

The SNR value for (quasi-) error free decoding also depends on the channel characteristics of the receiver. For instance the required SNR for error free decoding of the DVB-T2 LDPC code in the AWGN channel is 0.8 dB, whereas 2.5 dB are required in the Rayleigh P1 multipath channel. The selected NUC for each code rate is thus not optimal in all channel environments and a tradeoff is necessary in a broadcasting environment that suits all (or most) users in the network. In a point-to-point network with return channel, the optimal NUC may be selected based on the measured channel characteristics in the receiver.

In the following some more explanation is provided regarding the definition of the non-uniform QAM constellations. Each input cell word (y 0,q . . . y m-1,q ) (i.e. provided to the modulator) shall be modulated using a non-uniform QAM constellation to give a constellation point z q prior to normalization, where m corresponds to the number of bits per QAM symbol m=log 2 (M). It should be noted that the parameter q used here for discrete time or subcarrier index corresponds to the parameter k as used in the above. The exact values of the real and imaginary components Re(z q ) and Im(z q ) for each combination of the relevant input bits y 0 . . . m-1,q are given in the following tables for the various constellation sizes depending on the NUC position vector.

In the following the Q-NUC optimization will be described, i.e. the optimization of a 2-dimensional constellation that is derived from a single quadrant. The above described optimization of a N 2 -QAM requires the optimization of sqrt(M)/2−1 degrees of freedom. Since the optimization of a 2-dimensional QAM constellation has 2*M degrees of freedom (real and imaginary part of each constellation point) the optimization is significantly more time consuming. This is also caused by the need of calculating the BICM capacity during the optimization for the 2-dimensional case instead of the 1-dimensional case. Since the optimum 2D-constellations for the 16-QAM case are symmetric with respect to the different quadrants of the constellations, the following simplifications can be applied during the optimization: Only one quadrant of the constellation is optimized during the constellation, reducing the degrees of freedom during the optimization from 2*M to M/2. From this quadrant the remaining quadrants can be derived, leading to a so called QQAM constellation. However, care must be taken to ensure that the properties of the bit labeling of the constellation points are retained. If the first quadrant is Gray-Mapped, offering a maximum Hamming distance of 1, the same must be ensured for the remaining quadrants of the QQAM constellation. This is ensured by the algorithm defined below.

›DESCRIPTION OF THE EMBODIMENTS · 5 of 8

To uniquely define a 16-QQAM only 8 real values are required, corresponding to 4 complex values representing the constellation points of the first quadrant. Based on the QQAM approach 16-QQAM, 32-QQAM, 64 QQAM, 256-QQAM and 1024-QQAM constellations have been optimized, clearly outperforming the N 2 -QAM constellations, especially in the low SNR regime. The performance of the 16-QQAM, 32-QQAM, 64-QQAM, 256-QQAM and 1024-QQAM constellations is depicted in FIG. 8 . The presented QQAM optimization approach can be used for any channel condition, e.g. for the AWGN channel as well as for fading channels.

In the following the definition of the NUC position vectors obtained by use of the above described approach for obtaining QQAM constellations is provided. The signal-to-noise ratio (SNR) is always denoted in dB.

a) 16 QQAM-AWGN Channel

SNR/w w0 w1 w2 w3 0 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.5 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 1 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 1.5 0.6921 + 0.8373i 0.8373 + 0.6921i 0.5853 + 0.6908i 0.6908 + 0.5854i 2 0.5879 + 0.4053i 1.0566 + 0.6114i 0.4053 + 0.5879i 0.6114 + 1.0566i 2.5 0.5354 + 0.3507i 0.3507 + 0.5354i 1.1217 + 0.5763i 0.5763 + 1.1217i 3 0.5551 + 1.1571i 0.3189 + 0.5012i 1.1571 + 0.5551i 0.5012 + 0.3189i 3.5 0.5410 + 1.1789i 1.1789 + 0.5410i 0.2981 + 0.4781i 0.4781 + 0.2981i 4 0.5309 + 1.1928i 1.1928 + 0.5309i 0.2842 + 0.4633i 0.4633 + 0.2842i 4.5 0.2752 + 0.4551i 0.4551 + 0.2752i 0.5232 + 1.2014i 1.2014 + 0.5232i 5 0.2696 + 0.4521i 0.4521 + 0.2696i 0.5169 + 1.2065i 1.2065 + 0.5169i 5.5 1.2092 + 0.5115i 0.4530 + 0.2663i 0.5115 + 1.2092i 0.2663 + 0.4530i 6 0.2642 + 0.4570i 0.4570 + 0.2642i 0.5067 + 1.2102i 1.2102 + 0.5067i 6.5 0.4634 + 0.2626i 1.2100 + 0.5023i 0.2626 + 0.4634i 0.5023 + 1.2100i 7 0.2606 + 0.4718i 0.4718 + 0.2606i 0.4984 + 1.2088i 1.2088 + 0.4984i 7.5 0.4951 + 1.2068i 1.2068 + 0.4951i 0.2575 + 0.4819i 0.4819 + 0.2575i 8 0.4925 + 1.2040i 0.2530 + 0.4936i 1.2040 + 0.4925i 0.4936 + 0.2530i 8.5 0.5061 + 0.2474i 0.2474 + 0.5061i 1.2007 + 0.4909i 0.4909 + 1.2007i 9 0.2472 + 0.5461i 0.4910 + 0.2363i 0.5032 + 1.2019i 1.1908 + 0.4773i 9.5 0.6186 + 0.2544i 0.2213 + 0.4416i 1.2080 + 0.5377i 0.4487 + 1.1657i 10 0.2173 + 0.4189i 0.6578 + 0.2571i 0.4326 + 1.1445i 1.2088 + 0.5659i 10.5 0.9576 + 0.2881i 0.2881 + 0.2881i 0.9576 + 0.9576i 0.2881 + 0.9576i 11 0.2918 + 0.2918i 0.9565 + 0.2918i 0.2918 + 0.9565i 0.9565 + 0.9565i 11.5 0.2949 − 0.2949i 0.9555 − 0.2949i 0.2949 − 0.9555i 0.9555 − 0.9555i 12 0.2976 − 0.2976i 0.9547 − 0.2976i 0.2976 − 0.9547i 0.9547 − 0.9547i 12.5 0.2999 − 0.2999i 0.9540 − 0.2999i 0.2999 − 0.9540i 0.9540 − 0.9540i 13 0.3018 − 0.3018i 0.9534 − 0.3018i 0.3018 − 0.9534i 0.9534 − 0.9534i 13.5 0.3035 − 0.3035i 0.9528 − 0.3035i 0.3035 − 0.9528i 0.9528 − 0.9528i 14 0.3050 − 0.3050i 0.9523 − 0.3050i 0.3050 − 0.9523i 0.9523 − 0.9523i 14.5 0.3063 − 0.3063i 0.9519 − 0.3063i 0.3063 − 0.9519i 0.9519 − 0.9519i 15 0.9516 + 0.9512i 0.9516 + 0.3073i 0.3074 + 0.9519i 0.3075 + 0.3076i

b) 32 QQAM-AWGN Channel

›DESCRIPTION OF THE EMBODIMENTS · 6 of 8

c) 64 QQAM-AWGN Channel

w SNR w0 w1 w2 w3 w4 0 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.5 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 1 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 1.5 0.8374 + 0.6919i 0.6909 + 0.5852i 0.8371 + 0.6921i 0.6907 + 0.5853i 0.8375 + 0.6921i 2 1.0566 + 0.6114i 1.0566 + 0.6114i 0.5879 + 0.4053i 0.5879 + 0.4053i 0.6114 + 1.0566i 2.5 1.1217 + 0.5763i 1.1217 + 0.5763i 1.1217 + 0.5763i 1.1217 + 0.5763i 0.5354 + 0.3507i 3 0.5551 + 1.1571i 0.3189 + 0.5012i 1.1571 + 0.5551i 0.5012 + 0.3189i 0.5551 + 1.1571i 3.5 1.1789 + 0.5410i 1.1789 + 0.5410i 1.1789 + 0.5410i 1.1789 + 0.5410i 0.4781 + 0.2981i 4 0.2842 + 0.4633i 0.2842 + 0.4633i 0.5309 + 1.1928i 0.5309 + 1.1927i 0.2842 + 0.4633i 4.5 0.5232 + 1.2014i 0.5232 + 1.2014i 0.5232 + 1.2014i 0.5232 + 1.2014i 1.2014 + 0.5232i 5 1.2065 + 0.5170i 1.2065 + 0.5169i 1.2065 + 0.5169i 1.2066 + 0.5169i 0.5170 + 1.2065i 5.5 1.2092 + 0.5115i 1.2092 + 0.5115i 1.2092 + 0.5115i 1.2092 + 0.5115i 0.4530 + 0.2663i 6 0.2642 + 0.4570i 0.2642 + 0.4570i 0.2642 + 0.4570i 0.2642 + 0.4570i 0.4570 + 0.2642i 6.5 0.5752 + 1.1632i 0.4305 + 1.2537i 0.5752 + 1.1632i 0.4305 + 1.2537i 1.1632 + 0.5752i 7 0.3595 + 1.2746i 0.6396 + 1.1327i 0.3595 + 1.2746i 0.6396 + 1.1327i 1.2746 + 0.3595i 7.5 0.7476 + 1.2181i 0.5961 + 1.0258i 0.3325 + 1.3887i 0.3069 + 1.1510i 1.2181 + 0.7475i 8 0.3109 + 1.4253i 0.7943 + 1.2523i 0.2868 + 1.0998i 0.5786 + 0.9799i 1.4253 + 0.3109i 8.5 1.6023 + 0.4387i 1.0881 + 0.8753i 0.4387 + 1.6023i 0.8753 + 1.0881i 0.9239 + 0.2202i 9 0.4221 + 1.5951i 1.5951 + 0.4221i 0.8732 + 1.0971i 1.0971 + 0.8732i 0.7823 + 0.2020i 9.5 0.8408 + 1.2670i 0.5485 + 0.9136i 0.2950 + 1.4844i 0.2548 + 1.0308i 1.2670 + 0.8407i 10 1.2647 + 0.8443i 1.4891 + 0.2935i 0.9020 + 0.5498i 1.0230 + 0.2451i 0.3069 + 0.1750i 10.5 0.2925 + 1.4892i 0.8449 + 1.2622i 0.2351 + 1.0196i 0.5555 + 0.8926i 1.4892 + 0.2925i 11 0.8435 + 1.2594i 0.5630 + 0.8851i 0.2921 + 1.4867i 0.2255 + 1.0193i 1.2594 + 0.8435i 11.5 0.2920 + 1.4827i 0.8411 + 1.2563i 0.2174 + 1.0211i 0.5702 + 0.8798i 1.4827 + 0.2920i 12 0.2920 + 1.4781i 0.8380 + 1.2527i 0.2112 + 1.0242i 0.5763 + 0.8768i 1.4781 + 0.2920i 12.5 0.2920 + 1.4732i 0.8348 + 1.2487i 0.2071 + 1.0283i 0.5811 + 0.8760i 1.4732 + 0.2920i 13 0.2978 + 1.4669i 0.8421 + 1.2355i 0.2135 + 1.0389i 0.6055 + 0.8654i 1.4685 + 0.2859i 13.5 1.4627 + 0.2996i 1.0469 + 0.2187i 1.2278 + 0.8422i 0.8605 + 0.6179i 0.4106 + 0.1299i 14 0.2989 + 1.4602i 0.8389 + 1.2232i 0.2232 + 1.0534i 0.6245 + 0.8593i 1.4560 + 0.2819i 14.5 0.2878 + 1.4388i 0.8133 + 1.2150i 0.2219 + 1.0386i 0.6145 + 0.8494i 1.4656 + 0.2931i 15 0.9687 − 0.4488i 0.1261 − 0.4193i 0.6752 − 0.4269i 0.3896 − 0.4201i 1.0304 − 0.1506i 15.5 0.9856 − 0.4661i 0.1264 − 0.4145i 0.6825 − 0.4329i 0.3948 − 0.4179i 1.0366 − 0.1534i 16 1.0161 − 0.4912i 0.1287 − 0.4061i 0.6966 − 0.4427i 0.4025 − 0.4142i 1.0441 − 0.1581i 16.5 1.0519 − 0.5188i 0.1325 − 0.3998i 0.7146 − 0.4532i 0.4122 − 0.4120i 1.0500 − 0.1642i 17 1.0725 − 0.5328i 0.1361 − 0.4023i 0.7267 − 0.4592i 0.4198 − 0.4151i 1.0501 − 0.1676i 17.5 1.0854 − 0.5394i 0.1392 − 0.4078i 0.7353 − 0.4623i 0.4262 − 0.4205i 1.0474 − 0.1695i 18 1.0941 − 0.5424i 0.1418 − 0.4131i 0.7424 − 0.4645i 0.4318 − 0.4266i 1.0439 − 0.1707i 18.5 1.0998 − 0.5430i 0.1439 − 0.4173i 0.7487 − 0.4666i 0.4370 − 0.4325i 1.0405 − 0.1713i 19 1.1032 − 0.5410i 0.1458 − 0.4204i 0.7543 − 0.4691i 0.4418 − 0.4382i 1.0373 − 0.1716i 19.5 1.1043 − 0.5346i 0.1473 − 0.4225i 0.7587 − 0.4731i 0.4459 − 0.4435i 1.0338 − 0.1710i 20 1.1039 − 0.5232i 0.1486 − 0.4237i 0.7620 − 0.4802i 0.4492 − 0.4482i 1.0304 − 0.1696i w SNR w5 w6 w7 0 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.5 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 1 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 1.5 0.6910 + 0.5854i 0.8372 + 0.6923i 0.6908 + 0.5855i 2 0.6114 + 1.0566i 0.4053 + 0.5879i 0.4053 + 0.5879i 2.5 0.5354 + 0.3507i 0.5354 + 0.3507i 0.5354 + 0.3507i 3 0.3189 + 0.5012i 1.1572 + 0.5551i 0.5012 + 0.3189i 3.5 0.4781 + 0.2980i 0.4781 + 0.2981i 0.4781 + 0.2981i 4 0.2842 + 0.4633i 0.5309 + 1.1928i 0.5309 + 1.1927i 4.5 1.2014 + 0.5232i 1.2014 + 0.5232i 1.2014 + 0.5232i 5 0.5169 + 1.2065i 0.5169 + 1.2065i 0.5169 + 1.2065i 5.5 0.4530 + 0.2663i 0.4530 + 0.2663i 0.4530 + 0.2663i 6 0.4570 + 0.2642i 0.4570 + 0.2642i 0.4570 + 0.2642i 6.5 1.2537 + 0.4305i 1.1632 + 0.5752i 1.2537 + 0.4305i 7 1.1327 + 0.6396i 1.2746 + 0.3595i 1.1327 + 0.6396i 7.5 1.0258 + 0.5961i 1.3887 + 0.3325i 1.1510 + 0.3069i 8 1.2523 + 0.7943i 1.0998 + 0.2868i 0.9799 + 0.5786i 8.5 0.8454 + 0.3049i 0.7818 + 0.2019i 0.7540 + 0.2653i 9 0.9288 + 0.2247i 0.7537 + 0.2686i 0.8479 + 0.3175i 9.5 0.9136 + 0.5485i 1.4844 + 0.2950i 1.0308 + 0.2548i 10 0.3075 + 0.1615i 0.5944 + 0.3252i 0.6401 + 0.2182i 10.5 1.2622 + 0.8449i 1.0196 + 0.2351i 0.8926 + 0.5555i 11 0.8851 + 0.5630i 1.4867 + 0.2921i 1.0193 + 0.2255i 11.5 1.2563 + 0.8411i 1.0211 + 0.2174i 0.8798 + 0.5702i 12 1.2527 + 0.8380i 1.0242 + 0.2112i 0.8768 + 0.5763i 12.5 1.2487 + 0.8348i 1.0283 + 0.2071i 0.8760 + 0.5811i 13 1.2516 + 0.8201i 1.0279 + 0.1981i 0.8857 + 0.5642i 13.5 0.7441 + 0.1749i 0.3822 + 0.1824i 0.6160 + 0.4168i 14 1.2434 + 0.8085i 1.0319 + 0.1914i 0.8945 + 0.5550i 14.5 1.2278 + 0.8230i 1.0649 + 0.2069i 0.8971 + 0.5677i 15 0.1248 − 0.1379i 0.6647 − 0.1295i 0.3769 − 0.1364i 15.5 0.1272 − 0.1353i 0.6796 − 0.1340i 0.3877 − 0.1359i 16 0.1321 − 0.1317i 0.6995 − 0.1411i 0.4035 − 0.1354i 16.5 0.1374 − 0.1295i 0.7170 − 0.1473i 0.4185 − 0.1357i 17 0.1398 − 0.1309i 0.7233 − 0.1496i 0.4246 − 0.1370i 17.5 0.1407 − 0.1336i 0.7243 − 0.1504i 0.4265 − 0.1388i 18 0.1411 − 0.1361i 0.7235 − 0.1509i 0.4269 − 0.1406i 18.5 0.1414 − 0.1380i 0.7224 − 0.1517i 0.4269 − 0.1425i 19 0.1414 − 0.1393i 0.7213 − 0.1527i 0.4267 − 0.1443i 19.5 0.1414 − 0.1401i 0.7201 − 0.1544i 0.4264 − 0.1461i 20 0.1413 − 0.1405i 0.7193 − 0.1572i 0.4263 − 0.1477i w SNR w8 w9 w10 w11 w12 0 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.5 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 1 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 1.5 0.6922 + 0.8371i 0.5854 + 0.6907i 0.6920 + 0.8373i 0.5852 + 0.6908i 0.6923 + 0.8373i 2 1.0565 + 0.6114i 1.0565 + 0.6114i 0.5879 + 0.4053i 0.5879 + 0.4053i 0.6114 + 1.0566i 2.5 0.5763 + 1.1217i 0.5763 + 1.1217i 0.5763 + 1.1217i 0.5763 + 1.1217i 0.3507 + 0.5354i 3 0.5551 + 1.1571i 0.3189 + 0.5012i 1.1571 + 0.5551i 0.5012 + 0.3189i 0.5551 + 1.1572i 3.5 0.5410 + 1.1789i 0.5410 + 1.1789i 0.5410 + 1.1789i 0.5410 + 1.1789i 0.2980 + 0.4781i 4 0.4633 + 0.2842i 0.4633 + 0.2842i 1.1927 + 0.5309i 1.1927 + 0.5309i 0.4633 + 0.2842i 4.5 0.2752 + 0.4551i 0.2752 + 0.4551i 0.2752 + 0.4551i 0.2752 + 0.4551i 0.4551 + 0.2752i 5 0.4521 + 0.2696i 0.4521 + 0.2696i 0.4521 + 0.2696i 0.4521 + 0.2696i 0.2696 + 0.4521i 5.5 0.5115 + 1.2092i 0.5115 + 1.2092i 0.5115 + 1.2092i 0.5115 + 1.2092i 0.2663 + 0.4530i 6 0.5067 + 1.2102i 0.5067 + 1.2102i 0.5067 + 1.2102i 0.5067 + 1.2102i 1.2102 + 0.5067i 6.5 0.2699 + 0.4632i 0.2553 + 0.4543i 0.2699 + 0.4632i 0.2553 + 0.4543i 0.4632 + 0.2699i 7 0.2470 + 0.4515i 0.2734 + 0.4630i 0.2470 + 0.4515i 0.2734 + 0.4630i 0.4515 + 0.2470i 7.5 0.2486 + 0.4162i 0.2870 + 0.4969i 0.2266 + 0.4085i 0.2500 + 0.4969i 0.4162 + 0.2486i 8 0.2104 + 0.3815i 0.2282 + 0.3849i 0.2478 + 0.5286i 0.2937 + 0.5184i 0.3815 + 0.2104i 8.5 0.2019 + 0.7818i 0.2653 + 0.7540i 0.2202 + 0.9239i 0.3049 + 0.8454i 0.2479 + 0.2675i 9 0.2247 + 0.9288i 0.2020 + 0.7823i 0.3175 + 0.8479i 0.2686 + 0.7537i 0.2676 + 0.2415i 9.5 0.1821 + 0.3172i 0.3159 + 0.5815i 0.1695 + 0.3173i 0.2278 + 0.6176i 0.3172 + 0.1821i 10 0.8443 + 1.2648i 0.2935 + 1.4891i 0.5498 + 0.9020i 0.2451 + 1.0230i 0.1750 + 0.3069i 10.5 0.1558 + 0.3029i 0.1712 + 0.3021i 0.2075 + 0.6586i 0.3354 + 0.6030i 0.3029 + 0.1558i 11 0.1697 + 0.3011i 0.3460 + 0.6087i 0.1514 + 0.3020i 0.1969 + 0.6737i 0.3011 + 0.1697i 11.5 0.1475 + 0.3040i 0.1691 + 0.3028i 0.1871 + 0.6855i 0.3563 + 0.6126i 0.3040 + 0.1475i 12 0.1436 + 0.3081i 0.1684 + 0.3059i 0.1789 + 0.6942i 0.3657 + 0.6155i 0.3081 + 0.1436i 12.5 0.1393 + 0.3138i 0.1671 + 0.3094i 0.1720 + 0.7004i 0.3741 + 0.6174i 0.3138 + 0.1393i 13 0.1338 + 0.3767i 0.1752 + 0.3563i 0.1756 + 0.7261i 0.4023 + 0.6180i 0.2713 + 0.1337i 13.5 0.2831 + 1.4625i 0.1935 + 1.0296i 0.8124 + 1.2487i 0.5574 + 0.8909i 0.1287 + 0.2512i 14 0.1266 + 0.4289i 0.1907 + 0.3970i 0.1717 + 0.7575i 0.4261 + 0.6136i 0.2362 + 0.1255i 14.5 0.1177 + 0.4119i 0.2516 + 0.3998i 0.1559 + 0.7442i 0.4328 + 0.5954i 0.1678 + 0.1166i 15 1.1704 − 0.7904i 0.1452 − 0.7405i 0.6932 − 0.8128i 0.4017 − 0.7221i 1.4580 − 0.2741i 15.5 1.1580 − 0.8178i 0.1416 − 0.7330i 0.6913 − 0.8132i 0.4018 − 0.7177i 1.4529 − 0.2702i 16 1.1306 − 0.8649i 0.1385 − 0.7199i 0.6874 − 0.8123i 0.4017 − 0.7107i 1.4516 − 0.2578i 16.5 1.0952 − 0.9115i 0.1369 − 0.7073i 0.6868 − 0.8108i 0.4044 − 0.7057i 1.4480 − 0.2403i 17 1.0771 − 0.9315i 0.1373 − 0.7043i 0.6956 − 0.8095i 0.4114 − 0.7109i 1.4380 − 0.2294i 17.5 1.0693 − 0.9408i 0.1388 − 0.7057i 0.7092 − 0.8073i 0.4197 − 0.7206i 1.4261 − 0.2216i 18 1.0666 − 0.9452i 0.1406 − 0.7083i 0.7229 − 0.8052i 0.4275 − 0.7307i 1.4143 − 0.2157i 18.5 1.0673 − 0.9458i 0.1425 − 0.7109i 0.7349 − 0.8045i 0.4344 − 0.7399i 1.4036 − 0.2110i 19 1.0720 − 0.9413i 0.1445 − 0.7131i 0.7452 − 0.8057i 0.4404 − 0.7481i 1.3941 − 0.2072i 19.5 1.0847 − 0.9271i 0.1467 − 0.7148i 0.7552 − 0.8112i 0.4463 − 0.7557i 1.3857 − 0.2033i 20 1.1043 − 0.9013i 0.1491 − 0.7159i 0.7655 − 0.8232i 0.4529 − 0.7625i 1.3785 − 0.1990i w SNR w13 w14 w15 0 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 0.5 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7071 + 0.7071i 1 0.7071 + 0.7071i 0.7071 + 0.7071i 0.7072 + 0.7071i 1.5 0.5854 + 0.6908i 0.6920 + 0.8375i 0.5853 + 0.6910i 2 0.6114 + 1.0566i 0.4053 + 0.5879i 0.4053 + 0.5879i 2.5 0.3507 + 0.5354i 0.3507 + 0.5354i 0.3507 + 0.5354i 3 0.3189 + 0.5012i 1.1571 + 0.5551i 0.5012 + 0.3189i 3.5 0.2980 + 0.4781i 0.2980 + 0.4781i 0.2980 + 0.4781i 4 0.4633 + 0.2842i 1.1928 + 0.5309i 1.1928 + 0.5309i 4.5 0.4551 + 0.2752i 0.4551 + 0.2752i 0.4551 + 0.2752i 5 0.2696 + 0.4521i 0.2696 + 0.4521i 0.2696 + 0.4521i 5.5 0.2663 + 0.4530i 0.2663 + 0.4530i 0.2663 + 0.4530i 6 1.2102 + 0.5067i 1.2102 + 0.5067i 1.2102 + 0.5067i 6.5 0.4543 + 0.2553i 0.4632 + 0.2699i 0.4543 + 0.2553i 7 0.4630 + 0.2734i 0.4515 + 0.2470i 0.4630 + 0.2734i 7.5 0.4969 + 0.2870i 0.4084 + 0.2266i 0.4969 + 0.2500i 8 0.3849 + 0.2282i 0.5286 + 0.2478i 0.5184 + 0.2937i 8.5 0.2701 + 0.2890i 0.2675 + 0.2479i 0.2890 + 0.2701i 9 0.2415 + 0.2676i 0.2913 + 0.2660i 0.2660 + 0.2913i 9.5 0.5815 + 0.3159i 0.3173 + 0.1695i 0.6176 + 0.2278i 10 0.1615 + 0.3075i 0.3252 + 0.5944i 0.2182 + 0.6401i 10.5 0.3021 + 0.1712i 0.6586 + 0.2075i 0.6030 + 0.3354i 11 0.6087 + 0.3460i 0.3020 + 0.1514i 0.6737 + 0.1969i 11.5 0.3028 + 0.1691i 0.6855 + 0.1871i 0.6126 + 0.3563i 12 0.3059 + 0.1684i 0.6942 + 0.1789i 0.6155 + 0.3657i 12.5 0.3094 + 0.1671i 0.7004 + 0.1720i 0.6174 + 0.3741i 13 0.2748 + 0.1572i 0.6840 + 0.1578i 0.6145 + 0.3555i 13.5 0.1488 + 0.6759i 0.1538 + 0.2598i 0.3493 + 0.6111i 14 0.2560 + 0.1549i 0.6735 + 0.1418i 0.6085 + 0.3483i 14.5 0.3325 + 0.1582i 0.7408 + 0.1355i 0.6200 + 0.3227i 15 0.1644 − 1.0798i 0.7344 − 1.2171i 0.2867 − 1.4419i 15.5 0.1686 − 1.0718i 0.7097 − 1.2125i 0.2732 − 1.4375i 16 0.1689 − 1.0567i 0.6750 − 1.2072i 0.2558 − 1.4247i 16.5 0.1677 − 1.0405i 0.6406 − 1.1995i 0.2402 − 1.4087i 17 0.1680 − 1.0338i 0.6220 − 1.1896i 0.2326 − 1.3986i 17.5 0.1682 − 1.0316i 0.6106 − 1.1783i 0.2287 − 1.3914i 18 0.1685 − 1.0310i 0.6029 − 1.1680i 0.2262 − 1.3855i 18.5 0.1691 − 1.0309i 0.5971 − 1.1599i 0.2240 − 1.3805i 19 0.1697 − 1.0309i 0.5918 − 1.1539i 0.2216 − 1.3761i 19.5 0.1703 − 1.0305i 0.5851 − 1.1507i 0.2181 − 1.3721i 20 0.1705 − 1.0293i 0.5745 − 1.1503i 0.2128 − 1.3684i

›DESCRIPTION OF THE EMBODIMENTS · 7 of 8

d) 256 QQAM-AWGN Channel

w SNR w0 w1 w2 w3 w4 5 0.4521 + 0.2696i 0.4521 + 0.2696i 1.2065 + 0.5169i 1.2065 + 0.5169i 0.4521 + 0.2696i 5.5 0.4530 + 0.2663i 0.4530 + 0.2663i 1.2092 + 0.5115i 1.2092 + 0.5115i 0.4530 + 0.2663i 6 1.2102 + 0.5067i 1.2102 + 0.5067i 1.2102 + 0.5067i 1.2102 + 0.5066i 0.4570 + 0.2642i 6.5 1.2537 + 0.4305i 1.2537 + 0.4304i 1.2537 + 0.4305i 1.2537 + 0.4305i 1.1632 + 0.5752i 7 1.1322 + 0.6970i 1.0432 + 0.6178i 1.5234 + 1.0871i 1.1322 + 0.6970i 1.2925 + 0.3605i 7.5 0.2741 + 0.4749i 0.2526 + 0.4285i 0.5864 + 1.0293i 0.6595 + 1.1198i 0.2951 + 0.5185i 8 0.3565 + 1.7813i 0.3059 + 1.2626i 0.3059 + 1.2626i 0.2962 + 1.1484i 1.0099 + 1.5146i 8.5 0.3488 + 1.7914i 0.2880 + 1.2587i 0.2880 + 1.2587i 0.2788 + 1.1468i 1.0152 + 1.5168i 9 1.6414 + 0.6837i 0.9335 + 0.8803i 0.2681 + 1.4953i 0.7270 + 0.9501i 1.8682 + 0.2925i 9.5 1.6327 + 0.6734i 0.9469 + 0.8771i 0.2526 + 1.4830i 0.7372 + 0.9369i 1.8490 + 0.2874i 10 1.7476 − 0.3437i 1.4279 − 0.2830i 0.9979 − 0.2435i 1.0202 − 0.2443i 1.4280 − 0.2830i 10.5 1.7549 − 0.3495i 1.4293 − 0.2804i 0.9857 − 0.2340i 1.0112 − 0.2349i 1.4293 − 0.2804i 11 0.3538 + 1.7624i 0.2785 + 1.4265i 0.2791 + 1.4266i 0.2610 + 1.3647i 0.9952 + 1.4965i 11.5 0.3289 + 1.4165i 0.3556 + 1.7714i 0.2605 + 1.3630i 0.2302 + 1.4276i 0.7692 + 1.2350i 12 0.6800 + 1.6926i 0.3911 + 1.3645i 0.2191 + 1.7524i 0.2274 + 1.4208i 0.8678 + 1.2487i 12.5 0.7085 + 1.6630i 0.4337 + 1.3632i 0.2265 + 1.7707i 0.2214 + 1.4346i 0.8829 + 1.2345i 13 0.7232 + 1.6427i 0.4625 + 1.3572i 0.2367 + 1.7836i 0.2081 + 1.4453i 0.8955 + 1.2316i 13.5 0.7280 + 1.6384i 0.4787 + 1.3492i 0.2417 + 1.7872i 0.1966 + 1.4478i 0.9185 + 1.2490i 14 0.6852 + 1.6631i 0.4978 + 1.3396i 0.2241 + 1.7611i 0.1891 + 1.4343i 1.0300 + 1.3532i 14.5 0.6850 + 1.6565i 0.5110 + 1.3346i 0.2284 + 1.7618i 0.1836 + 1.4363i 1.0485 + 1.3578i 15 1.1831 + 1.3352i 1.5548 + 0.8930i 1.0563 + 0.9473i 1.1944 + 0.8535i 1.7139 + 0.2236i 15.5 1.3333 + 1.1727i 0.9525 + 1.0450i 0.8764 + 1.5619i 0.8595 + 1.2191i 1.2665 + 0.7890i 16 1.0693 + 1.3695i 1.6456 + 0.7233i 1.0401 + 0.9844i 1.3351 + 0.9489i 1.6696 + 0.1992i 16.5 1.3185 + 1.1655i 1.0729 + 0.9416i 0.9781 + 1.3517i 0.9292 + 0.9707i 1.4986 + 0.8198i 17 1.1514 + 1.3474i 1.3447 + 1.0136i 0.9323 + 1.1378i 0.9510 + 0.9427i 1.2112 + 0.5426i 17.5 1.1159 + 1.3726i 1.3078 + 1.0458i 0.9051 + 1.1657i 0.9509 + 0.9581i 1.2112 + 0.5506i 18 1.1058 + 1.3496i 1.2204 + 1.0180i 0.8713 + 1.1743i 0.9189 + 0.9604i 1.2283 + 0.6284i 18.5 1.1022 + 1.3396i 1.2102 + 1.0122i 0.8669 + 1.1800i 0.9153 + 0.9665i 1.2205 + 0.6352i 19 1.5817 + 0.4283i 1.4894 + 0.1404i 1.4735 + 0.7375i 1.2229 + 0.6531i 1.0586 + 0.3317i 19.5 0.8375 + 1.4782i 1.3271 + 0.8728i 1.1494 + 1.1881i 1.0720 + 0.8655i 1.5541 + 0.6145i 20 1.1577 + 1.2607i 1.2132 + 0.9665i 0.8650 + 1.2652i 0.9371 + 1.0167i 1.2341 + 0.6321i 20.5 1.1623 + 1.2367i 1.2152 + 0.9464i 0.8671 + 1.2704i 0.9416 + 1.0203i 1.2263 + 0.6212i 21 1.1584 + 1.2194i 1.2110 + 0.9332i 0.8614 + 1.2738i 0.9374 + 1.0274i 1.2218 + 0.6145i 21.5 1.1541 + 1.1980i 1.2082 + 0.9192i 0.8523 + 1.2778i 0.9253 + 1.0390i 1.2200 + 0.6057i 22 1.1564 + 1.1321i 1.2409 + 0.8772i 0.8304 + 1.2958i 0.8902 + 1.0738i 1.2195 + 0.5872i 22.5 1.1672 + 1.0989i 1.2422 + 0.8522i 0.8024 + 1.2971i 0.8967 + 1.0878i 1.2134 + 0.5744i 23 1.2322 + 1.0269i 1.4082 + 0.7080i 0.7782 + 1.3193i 0.9660 + 1.1333i 1.4427 + 0.4179i 23.5 1.1616 + 1.0595i 1.2384 + 0.8218i 0.7696 + 1.2863i 0.8965 + 1.0947i 1.1989 + 0.5582i 24 1.2424 + 0.9493i 1.2834 + 0.7245i 0.9545 + 1.2183i 1.0015 + 1.0002i 1.1739 + 0.5257i 24.5 1.2328 + 0.9369i 1.2653 + 0.7160i 0.9349 + 1.2178i 0.9989 + 1.0051i 1.1766 + 0.5132i 25 1.2245 + 0.9258i 1.2535 + 0.7077i 0.9208 + 1.2133i 0.9969 + 1.0052i 1.1757 + 0.5047i 25.5 1.2171 + 0.9128i 1.2413 + 0.6969i 0.9105 + 1.2064i 0.9951 + 1.0017i 1.1707 + 0.4940i 26 1.2103 + 0.9014i 1.2323 + 0.6874i 0.9022 + 1.1987i 0.9925 + 0.9967i 1.1677 + 0.4847i w SNR w5 w6 w7 5 0.4521 + 0.2696i 1.2065 + 0.5169i 1.2065 + 0.5169i 5.5 0.4530 + 0.2663i 1.2092 + 0.5115i 1.2092 + 0.5115i 6 0.4570 + 0.2642i 0.4570 + 0.2642i 0.4570 + 0.2642i 6.5 1.1632 + 0.5752i 1.1632 + 0.5752i 1.1632 + 0.5752i 7 1.1736 + 0.3521i 1.6996 + 0.3860i 1.2925 + 0.3605i 7.5 0.2741 + 0.4749i 0.5525 + 0.9862i 0.5864 + 1.0293i 8 0.6749 + 1.1091i 0.6749 + 1.1091i 0.6000 + 1.0201i 8.5 0.6879 + 1.1023i 0.6879 + 1.1023i 0.6127 + 1.0130i 9 0.8579 + 0.9067i 0.3433 + 1.4695i 0.6978 + 1.0003i 9.5 0.8644 + 0.9027i 0.3370 + 1.4511i 0.7054 + 0.9892i 10 1.3530 − 0.2686i 1.0202 − 0.2443i 1.0415 − 0.2449i 10.5 1.3614 − 0.2635i 1.0112 − 0.2349i 1.0372 − 0.2356i 11 0.8099 + 1.2071i 0.8097 + 1.2074i 0.7783 + 1.1510i 11.5 1.0007 + 1.5057i 0.7800 + 1.1485i 0.8472 + 1.1728i 12 0.7275 + 1.1667i 0.8747 + 1.0470i 0.7930 + 1.0406i 12.5 0.7423 + 1.1546i 0.9077 + 1.0034i 0.8363 + 0.9971i 13 0.7485 + 1.1494i 0.9349 + 0.9699i 0.8724 + 0.9626i 13.5 0.7448 + 1.1524i 0.9536 + 0.9516i 0.8912 + 0.9461i 14 0.7389 + 1.1771i 0.9797 + 0.9598i 0.8864 + 0.9798i 14.5 0.7448 + 1.1781i 0.9923 + 0.9464i 0.9014 + 0.9717i 15 1.4688 + 0.5085i 0.9846 + 0.6522i 1.0982 + 0.6252i 15.5 1.0238 + 0.8157i 1.0119 + 0.5685i 1.0066 + 0.6087i 16 1.4116 + 0.4773i 0.9912 + 0.6923i 1.1625 + 0.6341i 16.5 1.2084 + 0.6881i 0.9265 + 0.5535i 0.9824 + 0.6211i 17 1.2864 + 0.7311i 0.9873 + 0.5679i 0.9676 + 0.7289i 17.5 1.3032 + 0.7544i 0.9969 + 0.5672i 0.9755 + 0.7547i 18 1.4576 + 0.8033i 1.0010 + 0.6008i 0.9350 + 0.7635i 18.5 1.4496 + 0.8012i 0.9972 + 0.5981i 0.9328 + 0.7745i 19 1.2553 + 0.3125i 0.9114 + 0.4575i 1.0349 + 0.5768i 19.5 1.2416 + 0.5886i 0.9113 + 0.4993i 1.0207 + 0.6225i 20 1.4507 + 0.7875i 0.9999 + 0.6438i 0.9509 + 0.8111i 20.5 1.4418 + 0.7638i 0.9979 + 0.6457i 0.9519 + 0.8158i 21 1.4309 + 0.7504i 0.9986 + 0.6549i 0.9484 + 0.8261i 21.5 1.4217 + 0.7371i 1.0021 + 0.6678i 0.9448 + 0.8412i 22 1.4329 + 0.6862i 1.0077 + 0.6857i 0.9610 + 0.8761i 22.5 1.4239 + 0.6620i 1.0091 + 0.6909i 0.9644 + 0.8828i 23 1.1837 + 0.7680i 0.9625 + 0.7036i 0.9821 + 0.8987i 23.5 1.4012 + 0.6249i 1.0129 + 0.6976i 0.9657 + 0.8860i 24 1.3794 + 0.4917i 1.0065 + 0.6128i 1.0346 + 0.7930i 24.5 1.3771 + 0.4884i 1.0162 + 0.6131i 1.0287 + 0.7970i 25 1.3715 + 0.4846i 1.0198 + 0.6112i 1.0268 + 0.7962i 25.5 1.3617 + 0.4870i 1.0203 + 0.6063i 1.0247 + 0.7923i 26 1.3547 + 0.4862i 1.0215 + 0.6013i 1.0233 + 0.7878i w SNR w8 w9 w10 w11 w12 5 0.4521 + 0.2696i 0.4521 + 0.2696i 1.2065 + 0.5169i 1.2065 + 0.5169i 0.4521 + 0.2696i 5.5 0.4530 + 0.2663i 0.4530 + 0.2663i 1.2092 + 0.5115i 1.2092 + 0.5115i 0.4530 + 0.2663i 6 1.2102 + 0.5067i 1.2102 + 0.5067i 1.2102 + 0.5067i 1.2102 + 0.5067i 0.4570 + 0.2642i 6.5 1.2538 + 0.4305i 1.2538 + 0.4304i 1.2538 + 0.4305i 1.2538 + 0.4305i 1.1632 + 0.5752i 7 1.0432 + 0.6178i 0.9995 + 0.5797i 1.1321 + 0.6970i 1.0432 + 0.6178i 1.1735 + 0.3521i 7.5 0.4749 + 0.2741i 0.4285 + 0.2526i 1.0293 + 0.5865i 1.1198 + 0.6595i 0.5185 + 0.2951i 8 0.3059 + 1.2626i 0.2962 + 1.1484i 0.2962 + 1.1484i 0.2917 + 1.0949i 0.6749 + 1.1091i 8.5 0.2880 + 1.2587i 0.2788 + 1.1468i 0.2788 + 1.1468i 0.2750 + 1.0951i 0.6879 + 1.1023i 9 1.5505 + 1.0696i 0.9759 + 0.9428i 0.3350 + 1.5307i 0.7461 + 0.9896i 1.1886 + 1.6606i 9.5 1.5654 + 1.1053i 0.9822 + 0.9424i 0.3199 + 1.5216i 0.7507 + 0.9792i 1.1323 + 1.6866i 10 1.4799 − 0.9890i 1.2150 − 0.8088i 0.8831 − 0.5335i 0.8998 − 0.5486i 1.2150 − 0.8088i 10.5 1.4880 − 0.9918i 1.2116 − 0.8109i 0.8680 − 0.5320i 0.8870 − 0.5496i 1.2116 − 0.8109i 11 0.2244 + 0.9784i 0.2256 + 1.0058i 0.2257 + 1.0057i 0.2268 + 1.0350i 0.5343 + 0.8558i 11.5 0.2281 + 0.9987i 0.2159 + 0.9723i 0.2194 + 1.0327i 0.2068 + 1.0040i 0.5478 + 0.8715i 12 0.2098 + 0.9768i 0.2241 + 1.0454i 0.1858 + 0.9878i 0.1901 + 1.0659i 0.5547 + 0.8312i 12.5 0.2230 + 0.9899i 0.2479 + 1.0582i 0.1802 + 1.0070i 0.1891 + 1.0869i 0.5702 + 0.8176i 13 0.2408 + 0.9979i 0.2750 + 1.0662i 0.1741 + 1.0211i 0.1849 + 1.1031i 0.5789 + 0.8090i 13.5 0.2553 + 0.9993i 0.2988 + 1.0689i 0.1656 + 1.0288i 0.1779 + 1.1140i 0.5802 + 0.8040i 14 0.2659 + 0.9951i 0.3199 + 1.0652i 0.1586 + 1.0330i 0.1732 + 1.1198i 0.5806 + 0.7935i 14.5 0.2918 + 0.9977i 0.3457 + 1.0677i 0.1513 + 1.0448i 0.1608 + 1.1366i 0.5795 + 0.7993i 15 0.7901 + 1.2547i 0.5814 + 1.0118i 0.8074 + 1.0302i 0.6237 + 1.0012i 0.6052 + 0.6617i 15.5 0.2231 + 1.7092i 0.6616 + 0.9740i 0.5030 + 1.4567i 0.6230 + 1.1163i 0.6633 + 0.6064i 16 0.7189 + 1.2484i 0.5519 + 1.0360i 0.8125 + 0.9999i 0.6001 + 0.9735i 0.6062 + 0.6558i 16.5 0.5954 + 1.6721i 0.6356 + 0.9282i 0.6612 + 1.3085i 0.6870 + 0.9890i 0.6139 + 0.5878i 17 0.7916 + 1.5326i 0.5781 + 0.9103i 0.6737 + 1.2261i 0.6488 + 0.9682i 0.6008 + 0.5904i 17.5 0.7546 + 1.5371i 0.5791 + 0.9008i 0.6529 + 1.2248i 0.6563 + 0.9619i 0.5998 + 0.5837i 18 0.7460 + 1.5301i 0.5607 + 0.8951i 0.6305 + 1.2208i 0.6414 + 0.9625i 0.5848 + 0.5763i 18.5 0.7388 + 1.5187i 0.5534 + 0.8948i 0.6245 + 1.2171i 0.6469 + 0.9671i 0.5816 + 0.5744i 19 1.0419 + 1.2518i 0.8657 + 1.0272i 1.2891 + 1.0296i 1.0567 + 0.8727i 0.6260 + 0.6701i 19.5 0.6600 + 1.2390i 0.6575 + 0.9736i 0.8905 + 1.1414i 0.8571 + 0.9152i 0.6106 + 0.5775i 20 0.5458 + 1.2087i 0.5280 + 0.9935i 0.6621 + 1.4483i 0.7224 + 0.9905i 0.5909 + 0.6140i 20.5 0.5495 + 1.2117i 0.5295 + 0.9994i 0.6564 + 1.4451i 0.7273 + 1.0021i 0.5962 + 0.6217i 21 0.5460 + 1.2127i 0.5252 + 1.0028i 0.6465 + 1.4397i 0.7242 + 1.0131i 0.6013 + 0.6294i 21.5 0.5373 + 1.2128i 0.5165 + 1.0048i 0.6343 + 1.4321i 0.7152 + 1.0245i 0.6073 + 0.6384i 22 0.5187 + 1.2127i 0.4960 + 1.0047i 0.6102 + 1.4243i 0.6926 + 1.0375i 0.6194 + 0.6507i 22.5 0.5099 + 1.2100i 0.4914 + 1.0072i 0.5898 + 1.4201i 0.6910 + 1.0470i 0.6271 + 0.6619i 23 0.5427 + 1.2003i 0.5813 + 1.0089i 0.5291 + 1.4273i 0.7630 + 1.0578i 0.6294 + 0.6610i 23.5 0.4976 + 1.2018i 0.4821 + 1.0103i 0.5648 + 1.4016i 0.6826 + 1.0558i 0.6404 + 0.6801i 24 0.5286 + 1.2013i 0.6120 + 1.0209i 0.7270 + 1.2479i 0.7961 + 1.0299i 0.6617 + 0.6693i 24.5 0.5158 + 1.1967i 0.6077 + 1.0231i 0.7117 + 1.2419i 0.7917 + 1.0319i 0.6714 + 0.6767i 25 0.5056 + 1.1921i 0.6041 + 1.0245i 0.7005 + 1.2353i 0.7883 + 1.0319i 0.6790 + 0.6831i 25.5 0.4973 + 1.1878i 0.6009 + 1.0255i 0.6921 + 1.2284i 0.7855 + 1.0302i 0.6850 + 0.6886i 26 0.4905 + 1.1842i 0.5982 + 1.0262i 0.6854 + 1.2221i 0.7829 + 1.0274i 0.6911 + 0.6930i w SNR w13 w14 w15 5 0.4521 + 0.2696i 1.2065 + 0.5169i 1.2065 + 0.5169i 5.5 0.4530 + 0.2663i 1.2092 + 0.5115i 1.2092 + 0.5115i 6 0.4570 + 0.2642i 0.4570 + 0.2642i 0.4570 + 0.2642i 6.5 1.1632 + 0.5752i 1.1632 + 0.5752i 1.1632 + 0.5752i 7 1.1130 + 0.3476i 1.2925 + 0.3604i 1.1736 + 0.3521i 7.5 0.4749 + 0.2741i 0.9862 + 0.5525i 1.0293 + 0.5865i 8 0.6000 + 1.0201i 0.6000 + 1.0201i 0.5650 + 0.9791i 8.5 0.6127 + 1.0130i 0.6127 + 1.0130i 0.5775 + 0.9727i 9 0.8973 + 0.9758i 0.4528 + 1.5320i 0.7212 + 1.0496i 9.5 0.8963 + 0.9732i 0.4510 + 1.5195i 0.7234 + 1.0425i 10 1.1516 − 0.7656i 0.8998 − 0.5486i 0.9155 − 0.5630i 10.5 1.1516 − 0.7744i 0.8870 − 0.5496i 0.9058 − 0.5674i 11 0.5530 + 0.8761i 0.5530 + 0.8761i 0.5730 + 0.8975i 11.5 0.5381 + 0.8437i 0.5789 + 0.8889i 0.5679 + 0.8596i 12 0.5479 + 0.8651i 0.6073 + 0.8182i 0.5955 + 0.8420i 12.5 0.5659 + 0.8534i 0.6329 + 0.7937i 0.6244 + 0.8161i 13 0.5764 + 0.8491i 0.6515 + 0.7734i 0.6454 + 0.7958i 13.5 0.5788 + 0.8534i 0.6616 + 0.7612i 0.6574 + 0.7871i 14 0.5791 + 0.8600i 0.6672 + 0.7597i 0.6655 + 0.7988i 14.5 0.5814 + 0.8684i 0.6777 + 0.7528i 0.6798 + 0.7908i 15 0.5759 + 0.7150i 0.7056 + 0.6773i 0.6439 + 0.7138i 15.5 0.6841 + 0.7162i 0.7194 + 0.5707i 0.7211 + 0.6351i 16 0.5673 + 0.7044i 0.7357 + 0.7025i 0.6195 + 0.7364i 16.5 0.6161 + 0.6843i 0.7069 + 0.5730i 0.6968 + 0.6615i 17 0.5968 + 0.6937i 0.7280 + 0.5839i 0.7207 + 0.6853i 17.5 0.5965 + 0.6939i 0.7601 + 0.5787i 0.7439 + 0.6985i 18 0.5797 + 0.7001i 0.7518 + 0.5786i 0.7339 + 0.7041i 18.5 0.5746 + 0.7125i 0.7634 + 0.5763i 0.7384 + 0.7224i 19 0.7308 + 0.8371i 0.7597 + 0.5841i 0.8864 + 0.7205i 19.5 0.6382 + 0.7572i 0.7620 + 0.5398i 0.8086 + 0.7221i 20 0.5567 + 0.7928i 0.7623 + 0.6325i 0.7410 + 0.7994i 20.5 0.5627 + 0.8030i 0.7674 + 0.6377i 0.7457 + 0.8086i 21 0.5660 + 0.8106i 0.7730 + 0.6458i 0.7464 + 0.8190i 21.5 0.5684 + 0.8175i 0.7801 + 0.6568i 0.7459 + 0.8311i 22 0.5744 + 0.8249i 0.7952 + 0.6762i 0.7540 + 0.8498i 22.5 0.5827 + 0.8346i 0.8016 + 0.6867i 0.7612 + 0.8629i 23 0.6110 + 0.8310i 0.7906 + 0.6835i 0.7844 + 0.8645i 23.5 0.5954 + 0.8500i 0.8128 + 0.7021i 0.7699 + 0.8797i 24 0.6621 + 0.8401i 0.8310 + 0.6617i 0.8389 + 0.8357i 24.5 0.6662 + 0.8463i 0.8411 + 0.6694i 0.8402 + 0.8434i 25 0.6702 + 0.8514i 0.8475 + 0.6749i 0.8427 + 0.8479i 25.5 0.6728 + 0.8554i 0.8517 + 0.6775i 0.8443 + 0.8495i 26 0.6740 + 0.8584i 0.8561 + 0.6778i 0.8451 + 0.8492i w SNR w16 w17 w18 w19 w20 5 0.4521 + 0.2696i 0.4521 + 0.2696i 1.2066 + 0.5169i 1.2065 + 0.5169i 0.4521 + 0.2696i 5.5 0.4530 + 0.2663i 0.4530 + 0.2663i 1.2092 + 0.5115i 1.2092 + 0.5115i 0.4530 + 0.2663i 6 0.5067 + 1.2102i 0.5067 + 1.2102i 0.5067 + 1.2102i 0.5067 + 1.2102i 0.2642 + 0.4570i 6.5 0.4543 + 0.2553i 0.4543 + 0.2553i 0.4543 + 0.2553i 0.4543 + 0.2553i 0.4632 + 0.2699i 7 0.4447 + 0.2583i 0.4838 + 0.2760i 0.4059 + 0.2408i 0.4446 + 0.2583i 0.4489 + 0.2323i 7.5 0.2526 + 0.4285i 0.2320 + 0.3831i 0.6595 + 1.1198i 0.9931 + 1.5130i 0.2741 + 0.4749i 8 1.7813 + 0.3565i 1.2626 + 0.3059i 1.2626 + 0.3059i 1.1484 + 0.2962i 1.5146 + 1.0099i 8.5 1.7914 + 0.3488i 1.2587 + 0.2880i 1.2587 + 0.2880i 1.1468 + 0.2788i 1.5168 + 1.0152i 9 1.1513 + 0.2749i 0.9582 + 0.3853i 0.9263 + 0.2229i 0.8516 + 0.3197i 1.1613 + 0.2336i 9.5 1.1819 + 0.2793i 0.9635 + 0.4036i 0.9172 + 0.2197i 0.8422 + 0.3264i 1.2076 + 0.2313i 10 0.3155 − 0.1636i 0.3150 − 0.1635i 0.6148 − 0.2161i 0.6216 − 0.2169i 0.3150 − 0.1635i 10.5 0.3085 − 0.1570i 0.3061 − 0.1564i 0.6354 − 0.2066i 0.6404 − 0.2071i 0.3061 − 0.1564i 11 1.7631 + 0.3541i 1.4267 + 0.2786i 1.4265 + 0.2791i 1.3649 + 0.2609i 1.4961 + 0.9954i 11.5 1.4190 + 0.3287i 1.7739 + 0.3559i 1.3649 + 0.2600i 1.4293 + 0.2298i 1.2376 + 0.7681i 12 1.4070 + 0.1790i 1.7227 + 0.2900i 1.3246 + 0.2562i 1.3636 + 0.3654i 1.3708 + 1.2834i 12.5 1.4067 + 0.1623i 1.7386 + 0.2869i 1.3213 + 0.2614i 1.3555 + 0.3818i 1.3728 + 1.2802i 13 1.4076 + 0.1477i 1.7480 + 0.2870i 1.3169 + 0.2677i 1.3479 + 0.3950i 1.3698 + 1.2765i 13.5 1.4079 + 0.1358i 1.7492 + 0.2856i 1.3108 + 0.2733i 1.3393 + 0.4031i 1.3733 + 1.2596i 14 1.3832 + 0.1273i 1.7176 + 0.2506i 1.2890 + 0.2587i 1.3115 + 0.3882i 1.4490 + 1.1367i 14.5 1.3830 + 0.1182i 1.7146 + 0.2469i 1.2824 + 0.2560i 1.3020 + 0.3885i 1.4514 + 1.1095i 15 0.9695 + 0.1063i 0.9761 + 0.1132i 0.9155 + 0.1657i 0.9251 + 0.1710i 1.3276 + 0.1371i 15.5 1.7803 + 0.2282i 1.4175 + 0.1304i 1.0142 + 0.1107i 1.0875 + 0.1106i 1.5669 + 0.6281i 16 0.9716 + 0.1054i 0.9824 + 0.1194i 0.9073 + 0.1715i 0.9217 + 0.1835i 1.3198 + 0.1175i 16.5 1.6501 + 0.1602i 1.3265 + 0.1294i 0.9609 + 0.1136i 1.0472 + 0.1153i 1.6046 + 0.4875i 17 1.3221 + 0.1224i 1.6557 + 0.1780i 1.0381 + 0.1026i 0.9427 + 0.1024i 1.2802 + 0.3500i 17.5 1.3275 + 0.1269i 1.6476 + 0.1778i 1.0687 + 0.1009i 0.9443 + 0.0988i 1.2837 + 0.3590i 18 1.3214 + 0.1348i 1.6192 + 0.1568i 1.0864 + 0.1085i 0.9690 + 0.1136i 1.2847 + 0.3887i 18.5 1.3267 + 0.1381i 1.6139 + 0.1586i 1.1074 + 0.1075i 0.9719 + 0.1124i 1.2798 + 0.3928i 19 0.8818 + 0.0863i 0.8598 + 0.0671i 0.6659 + 0.0819i 0.6786 + 0.1287i 0.9883 + 0.2131i 19.5 1.5486 + 0.1257i 1.2666 + 0.1072i 0.9028 + 0.1029i 1.0498 + 0.1027i 1.4788 + 0.3590i 20 1.5281 + 0.1441i 1.2566 + 0.1120i 0.9743 + 0.0673i 1.0261 + 0.1720i 1.4715 + 0.4355i 20.5 1.5048 + 0.1396i 1.2429 + 0.1109i 0.9704 + 0.0648i 1.0197 + 0.1762i 1.4594 + 0.4244i 21 1.4884 + 0.1372i 1.2362 + 0.1109i 0.9743 + 0.0635i 1.0194 + 0.1825i 1.4526 + 0.4196i 21.5 1.4742 + 0.1349i 1.2309 + 0.1105i 0.9796 + 0.0634i 1.0198 + 0.1891i 1.4461 + 0.4142i 22 1.4534 + 0.1259i 1.2190 + 0.1086i 0.9789 + 0.0639i 1.0144 + 0.1947i 1.4356 + 0.3854i 22.5 1.4370 + 0.1217i 1.2104 + 0.1069i 0.9794 + 0.0652i 1.0117 + 0.2003i 1.4268 + 0.3730i 23 1.1919 + 0.0896i 1.4034 + 0.1266i 1.0017 + 0.0743i 0.9909 + 0.2196i 1.2082 + 0.5145i 23.5 1.4070 + 0.1153i 1.1945 + 0.1045i 0.9784 + 0.0686i 1.0093 + 0.2102i 1.4123 + 0.3539i 24 1.1265 + 0.0892i 1.3157 + 0.0959i 0.9524 + 0.0776i 0.9403 + 0.2321i 1.4948 + 0.2501i 24.5 1.1278 + 0.0893i 1.3152 + 0.0946i 0.9556 + 0.0782i 0.9422 + 0.2341i 1.4851 + 0.2508i 25 1.1316 + 0.0895i 1.3173 + 0.0939i 0.9608 + 0.0790i 0.9429 + 0.2357i 1.4766 + 0.2540i 25.5 1.1477 + 0.0888i 1.3330 + 0.0946i 0.9772 + 0.0808i 0.9387 + 0.2361i 1.4686 + 0.2702i 26 1.1595 + 0.0882i 1.3430 + 0.0950i 0.9894 + 0.0820i 0.9367 + 0.2358i 1.4613 + 0.2782i w SNR w21 w22 w23 5 0.4521 + 0.2696i 1.2065 + 0.5169i 1.2065 + 0.5169i 5.5 0.4530 + 0.2663i 1.2092 + 0.5115i 1.2092 + 0.5115i 6 0.2642 + 0.4570i 0.2642 + 0.4570i 0.2642 + 0.4570i 6.5 0.4632 + 0.2699i 0.4632 + 0.2699i 0.4632 + 0.2699i 7 0.4922 + 0.2439i 0.4072 + 0.2200i 0.4489 + 0.2323i 7.5 0.2526 + 0.4285i 0.5864 + 1.0293i 0.6595 + 1.1198i 8 1.1091 + 0.6749i 1.1091 + 0.6749i 1.0201 + 0.6000i 8.5 1.1023 + 0.6879i 1.1023 + 0.6879i 1.0130 + 0.6127i 9 0.9349 + 0.3518i 0.9192 + 0.2077i 0.8418 + 0.2979i 9.5 0.9381 + 0.3697i 0.9115 + 0.2050i 0.8325 + 0.3045i 10 0.3145 − 0.1634i 0.6216 − 0.2169i 0.6290 − 0.2176i 10.5 0.3037 − 0.1557i 0.6404 − 0.2071i 0.6460 − 0.2075i 11 1.2073 + 0.8102i 1.2072 + 0.8097i 1.1510 + 0.7784i 11.5 1.5057 + 1.0025i 1.1507 + 0.7776i 1.1738 + 0.8449i 12 1.6701 + 0.8403i 1.1614 + 0.7909i 1.2241 + 0.7367i 12.5 1.6730 + 0.8349i 1.1629 + 0.7604i 1.2237 + 0.7169i 13 1.6671 + 0.8318i 1.1603 + 0.7369i 1.2208 + 0.7017i 13.5 1.6601 + 0.8198i 1.1559 + 0.7249i 1.2163 + 0.6897i 14 1.6791 + 0.7233i 1.1637 + 0.7318i 1.2117 + 0.6596i 14.5 1.6674 + 0.7048i 1.1614 + 0.7220i 1.2096 + 0.6442i 15 1.2605 + 0.2607i 0.9657 + 0.4185i 1.0313 + 0.4086i 15.5 1.3668 + 0.3723i 1.0160 + 0.3423i 1.0838 + 0.3367i 16 1.2383 + 0.2709i 0.9483 + 0.4442i 1.0242 + 0.4164i 16.5 1.2991 + 0.3994i 0.9506 + 0.3440i 1.0402 + 0.3427i 17 1.5980 + 0.5501i 0.9903 + 0.3365i 0.9340 + 0.2929i 17.5 1.5920 + 0.5468i 1.0024 + 0.3379i 0.9388 + 0.2809i 18 1.5877 + 0.4787i 1.0252 + 0.3747i 0.9593 + 0.3085i 18.5 1.5690 + 0.4783i 1.0323 + 0.3791i 0.9610 + 0.2983i 19 1.1539 + 0.0898i 0.7883 + 0.3358i 0.7109 + 0.2753i 19.5 1.2369 + 0.3451i 0.9051 + 0.3205i 1.0533 + 0.3050i 20 1.2435 + 0.3351i 0.9816 + 0.4825i 1.0252 + 0.3371i 20.5 1.2338 + 0.3332i 0.9790 + 0.4840i 1.0192 + 0.3364i 21 1.2302 + 0.3337i 0.9804 + 0.4906i 1.0189 + 0.3404i 21.5 1.2279 + 0.3323i 0.9827 + 0.4998i 1.0202 + 0.3467i 22 1.2194 + 0.3249i 0.9844 + 0.5115i 1.0179 + 0.3535i 22.5 1.2148 + 0.3198i 0.9818 + 0.5182i 1.0172 + 0.3596i 23 1.2105 + 0.3132i 1.0055 + 0.5362i 1.0096 + 0.3698i 23.5 1.2076 + 0.3137i 0.9768 + 0.5294i 1.0171 + 0.3701i 24 1.2660 + 0.2959i 0.9649 + 0.4426i 1.0812 + 0.3131i 24.5 1.2669 + 0.2917i 0.9719 + 0.4412i 1.0855 + 0.3077i 25 1.2666 + 0.2886i 0.9763 + 0.4381i 1.0887 + 0.3028i 25.5 1.2647 + 0.2863i 0.9779 + 0.4321i 1.0881 + 0.2935i 26 1.2637 + 0.2839i 0.9800 + 0.4265i 1.0889 + 0.2858i w SNR w24 w25 w26 w27 w28 5 0.4521 + 0.2696i 0.4521 + 0.2696i 1.2066 + 0.5170i 1.2066 + 0.5169i 0.4521 + 0.2696i 5.5 0.4530 + 0.2663i 0.4530 + 0.2663i 1.2092 + 0.5115i 1.2092 + 0.5115i 0.4530 + 0.2663i 6 0.5067 + 1.2102i 0.5067 + 1.2102i 0.5067 + 1.2102i 0.5067 + 1.2102i 0.2642 + 0.4570i 6.5 0.4543 + 0.2553i 0.4543 + 0.2553i 0.4543 + 0.2553i 0.4543 + 0.2553i 0.4632 + 0.2699i 7 0.4838 + 0.2760i 0.5211 + 0.2931i 0.4447 + 0.2583i 0.4838 + 0.2760i 0.4922 + 0.2439i 7.5 0.4285 + 0.2526i 0.3831 + 0.2320i 1.1198 + 0.6595i 1.5130 + 0.9931i 0.4749 + 0.2741i 8 1.2626 + 0.3059i 1.1484 + 0.2962i 1.1484 + 0.2962i 1.0949 + 0.2917i 1.1091 + 0.6749i 8.5 1.2587 + 0.2880i 1.1468 + 0.2788i 1.1468 + 0.2788i 1.0951 + 0.2750i 1.1023 + 0.6879i 9 0.9975 + 0.2556i 0.9006 + 0.3666i 0.8710 + 0.2142i 0.8224 + 0.3027i 0.9862 + 0.2318i 9.5 1.0053 + 0.2519i 0.8985 + 0.3753i 0.8625 + 0.2071i 0.8135 + 0.3017i 0.9978 + 0.2280i 10 0.3146 − 0.1777i 0.3142 − 0.1775i 0.5742 − 0.3118i 0.5798 − 0.3157i 0.3142 − 0.1775i 10.5 0.3073 − 0.1726i 0.3050 − 0.1716i 0.5854 − 0.3219i 0.5893 − 0.3250i 0.3050 − 0.1716i 11 0.9785 + 0.2245i 1.0059 + 0.2256i 1.0059 + 0.2258i 1.0352 + 0.2267i 0.8559 + 0.5343i 11.5 0.9987 + 0.2268i 0.9721 + 0.2149i 1.0331 + 0.2184i 1.0039 + 0.2063i 0.8726 + 0.5450i 12 0.9769 + 0.1863i 0.9452 + 0.2057i 1.0100 + 0.2182i 0.9795 + 0.2417i 0.8241 + 0.4856i 12.5 0.9683 + 0.1724i 0.9333 + 0.1897i 1.0041 + 0.2062i 0.9683 + 0.2269i 0.8178 + 0.4576i 13 0.9630 + 0.1618i 0.9257 + 0.1770i 1.0010 + 0.1965i 0.9611 + 0.2140i 0.8118 + 0.4407i 13.5 0.9601 + 0.1547i 0.9220 + 0.1683i 1.0004 + 0.1894i 0.9581 + 0.2045i 0.8067 + 0.4374i 14 0.9469 + 0.1512i 0.9124 + 0.1673i 0.9890 + 0.1827i 0.9504 + 0.2018i 0.7985 + 0.4530i 14.5 0.9396 + 0.1469i 0.9065 + 0.1618i 0.9886 + 0.1761i 0.9486 + 0.1944i 0.7983 + 0.4483i 15 0.6332 + 0.1376i 0.6285 + 0.1371i 0.6534 + 0.1501i 0.6480 + 0.1483i 0.6046 + 0.4106i 15.5 0.6340 + 0.1108i 0.6241 + 0.1086i 0.7380 + 0.1117i 0.7116 + 0.1105i 0.6382 + 0.3325i 16 0.6360 + 0.1334i 0.6290 + 0.1387i 0.6599 + 0.1476i 0.6524 + 0.1515i 0.6101 + 0.4269i 16.5 0.6045 + 0.1089i 0.5923 + 0.1112i 0.7207 + 0.1103i 0.6832 + 0.1122i 0.6014 + 0.3528i 17 0.5830 + 0.1125i 0.5933 + 0.1207i 0.6682 + 0.1069i 0.7042 + 0.1111i 0.5954 + 0.3748i 17.5 0.5819 + 0.1126i 0.5915 + 0.1279i 0.6742 + 0.1025i 0.7217 + 0.1106i 0.5959 + 0.3826i 18 0.5961 + 0.1084i 0.5983 + 0.1324i 0.7244 + 0.0980i 0.7655 + 0.1162i 0.5947 + 0.3818i 18.5 0.5961 + 0.1025i 0.5964 + 0.1417i 0.7314 + 0.0890i 0.7775 + 0.1184i 0.5953 + 0.3915i 19 0.4061 + 0.0799i 0.4265 + 0.2175i 0.4641 + 0.0772i 0.4884 + 0.1954i 0.5409 + 0.5182i 19.5 0.5082 + 0.0656i 0.5265 + 0.1285i 0.7398 + 0.0890i 0.6724 + 0.1233i 0.5700 + 0.4187i 20 0.6423 + 0.0698i 0.6358 + 0.1904i 0.8003 + 0.0754i 0.8009 + 0.2018i 0.6132 + 0.4606i 20.5 0.6384 + 0.0678i 0.6332 + 0.1948i 0.7968 + 0.0730i 0.8000 + 0.2036i 0.6160 + 0.4668i 21 0.6429 + 0.0675i 0.6384 + 0.1981i 0.8011 + 0.0721i 0.8064 + 0.2059i 0.6220 + 0.4731i 21.5 0.6501 + 0.0680i 0.6464 + 0.2016i 0.8075 + 0.0719i 0.8146 + 0.2088i 0.6296 + 0.4809i 22 0.6546 + 0.0693i 0.6531 + 0.2062i 0.8096 + 0.0722i 0.8191 + 0.2122i 0.6400 + 0.4925i 22.5 0.6581 + 0.0702i 0.6580 + 0.2095i 0.8121 + 0.0727i 0.8228 + 0.2154i 0.6452 + 0.5010i 23 0.6613 + 0.0692i 0.6601 + 0.2094i 0.8231 + 0.0709i 0.8202 + 0.2164i 0.6479 + 0.5023i 23.5 0.6618 + 0.0721i 0.6653 + 0.2161i 0.8148 + 0.0743i 0.8285 + 0.2219i 0.6524 + 0.5156i 24 0.6277 + 0.0697i 0.6260 + 0.2109i 0.7852 + 0.0706i 0.7804 + 0.2127i 0.6444 + 0.5097i 24.5 0.6341 + 0.0711i 0.6317 + 0.2150i 0.7905 + 0.0716i 0.7839 + 0.2154i 0.6537 + 0.5167i 25 0.6408 + 0.0723i 0.6355 + 0.2186i 0.7969 + 0.0724i 0.7860 + 0.2176i 0.6614 + 0.5229i 25.5 0.6523 + 0.0731i 0.6352 + 0.2218i 0.8115 + 0.0731i 0.7837 + 0.2189i 0.6674 + 0.5284i 26 0.6622 + 0.0739i 0.6337 + 0.2246i 0.8231 + 0.0739i 0.7818 + 0.2196i 0.6739 + 0.5331i w SNR w29 w30 w31 5 0.4521 + 0.2696i 1.2065 + 0.5169i 1.2065 + 0.5169i 5.5 0.4530 + 0.2663i 1.2092 + 0.5115i 1.2092 + 0.5115i 6 0.2642 + 0.4570i 0.2642 + 0.4570i 0.2642 + 0.4570i 6.5 0.4632 + 0.2699i 0.4632 + 0.2699i 0.4632 + 0.2699i 7 0.5344 + 0.2543i 0.4489 + 0.2323i 0.4922 + 0.2439i 7.5 0.4285 + 0.2526i 1.0293 + 0.5865i 1.1198 + 0.6595i 8 1.0201 + 0.6000i 1.0201 + 0.6000i 0.9791 + 0.5650i 8.5 1.0130 + 0.6127i 1.0130 + 0.6127i 0.9727 + 0.5775i 9 0.8825 + 0.3368i 0.8657 + 0.2019i 0.8149 + 0.2834i 9.5 0.8803 + 0.3458i 0.8585 + 0.1955i 0.8067 + 0.2829i 10 0.3138 − 0.1773i 0.5798 − 0.3157i 0.5859 − 0.3199i 10.5 0.3028 − 0.1707i 0.5893 − 0.3250i 0.5937 − 0.3285i 11 0.8762 + 0.5531i 0.8762 + 0.5531i 0.8976 + 0.5730i 11.5 0.8450 + 0.5352i 0.8906 + 0.5760i 0.8612 + 0.5648i 12 0.8232 + 0.4837i 0.8799 + 0.5391i 0.8796 + 0.5356i 12.5 0.8166 + 0.4551i 0.8733 + 0.5139i 0.8722 + 0.5104i 13 0.8110 + 0.4367i 0.8663 + 0.4978i 0.8649 + 0.4934i 13.5 0.8071 + 0.4310i 0.8603 + 0.4941i 0.8598 + 0.4876i 14 0.8036 + 0.4426i 0.8538 + 0.5071i 0.8600 + 0.4961i 14.5 0.8042 + 0.4365i 0.8518 + 0.5057i 0.8594 + 0.4926i 15 0.5971 + 0.4001i 0.6631 + 0.4203i 0.6466 + 0.4063i 15.5 0.6300 + 0.3171i 0.7230 + 0.3385i 0.7071 + 0.3272i 16 0.5981 + 0.4118i 0.6844 + 0.4315i 0.6536 + 0.4074i 16.5 0.5903 + 0.3283i 0.7010 + 0.3475i 0.6697 + 0.3280i 17 0.5987 + 0.3416i 0.7073 + 0.3701i 0.7192 + 0.3275i 17.5 0.5970 + 0.3410i 0.7339 + 0.3759i 0.7430 + 0.3188i 18 0.5970 + 0.3304i 0.7535 + 0.3905i 0.7704 + 0.3249i 18.5 0.5975 + 0.3225i 0.7649 + 0.4029i 0.7817 + 0.3156i 19 0.4759 + 0.3755i 0.6422 + 0.4556i 0.5543 + 0.3409i 19.5 0.5429 + 0.2967i 0.7319 + 0.3429i 0.6646 + 0.2744i 20 0.6264 + 0.3286i 0.7906 + 0.4757i 0.8007 + 0.3342i 20.5 0.6266 + 0.3299i 0.7913 + 0.4796i 0.8013 + 0.3338i 21 0.6327 + 0.3327i 0.7953 + 0.4864i 0.8070 + 0.3371i 21.5 0.6412 + 0.3374i 0.8008 + 0.4955i 0.8141 + 0.3431i 22 0.6498 + 0.3451i 0.8073 + 0.5082i 0.8199 + 0.3516i 22.5 0.6552 + 0.3508i 0.8087 + 0.5167i 0.8230 + 0.3582i 23 0.6570 + 0.3532i 0.8160 + 0.5191i 0.8231 + 0.3662i 23.5 0.6640 + 0.3620i 0.8099 + 0.5313i 0.8291 + 0.3705i 24 0.6285 + 0.3572i 0.8056 + 0.5017i 0.7792 + 0.3548i 24.5 0.6360 + 0.3632i 0.8156 + 0.5101i 0.7875 + 0.3608i 25 0.6414 + 0.3685i 0.8234 + 0.5160i 0.7936 + 0.3653i 25.5 0.6441 + 0.3734i 0.8292 + 0.5189i 0.7961 + 0.3682i 26 0.6474 + 0.3777i 0.8353 + 0.5198i 0.7994 + 0.3695i w SNR w32 w33 w34 w35 w36 5 0.2696 + 0.4521i 0.2696 + 0.4521i 0.5169 + 1.2065i 0.5169 + 1.2065i 0.2696 + 0.4521i 5.5 0.2663 + 0.4530i 0.2663 + 0.4530i 0.5115 + 1.2092i 0.5115 + 1.2092i 0.2663 + 0.4530i 6 1.2102 + 0.5067i 1.2102 + 0.5067i 1.2102 + 0.5067i 1.2102 + 0.5066i 0.4570 + 0.2642i 6.5 0.4304 + 1.2538i 0.4304 + 1.2538i 0.4305 + 1.2537i 0.4305 + 1.2537i 0.5752 + 1.1632i 7 0.5818 + 1.1302i 0.5321 + 1.0488i 0.7162 + 1.3338i 0.5818 + 1.1302i 0.3631 + 1.2644i 7.5 0.2435 + 0.4714i 0.2297 + 0.4213i 0.3175 + 1.1489i 0.3279 + 1.2665i 0.2555 + 0.5207i 8 0.2078 + 0.3708i 0.2228 + 0.4230i 0.2228 + 0.4230i 0.2369 + 0.4792i 0.2257 + 0.3788i 8.5 0.1998 + 0.3693i 0.2156 + 0.4280i 0.2156 + 0.4280i 0.2299 + 0.4909i 0.2178 + 0.3747i 9 0.1831 + 0.6858i 0.2571 + 0.6818i 0.1879 + 0.8140i 0.2811 + 0.7667i 0.1851 + 0.6883i 9.5 0.1794 + 0.6888i 0.2585 + 0.6798i 0.1875 + 0.8249i 0.2921 + 0.7656i 0.1820 + 0.6921i 10 0.3437 − 1.7476i 0.2830 − 1.4280i 0.2435 − 0.9979i 0.2443 − 1.0202i 0.2830 − 1.4280i 10.5 0.3495 − 1.7549i 0.2804 − 1.4293i 0.2340 − 0.9857i 0.2349 − 1.0112i 0.2804 − 1.4293i 11 0.1519 + 0.3049i 0.1510 + 0.3016i 0.1510 + 0.3016i 0.1502 + 0.2983i 0.1699 + 0.3036i 11.5 0.1463 + 0.3015i 0.1471 + 0.3053i 0.1453 + 0.2979i 0.1463 + 0.3015i 0.1666 + 0.2998i 12 0.1376 + 0.3342i 0.1383 + 0.3292i 0.1363 + 0.3322i 0.1370 + 0.3273i 0.1655 + 0.3265i 12.5 0.1305 + 0.3817i 0.1310 + 0.3772i 0.1295 + 0.3801i 0.1300 + 0.3756i 0.1670 + 0.3628i 13 0.1255 + 0.4148i 0.1258 + 0.4110i 0.1246 + 0.4139i 0.1249 + 0.4100i 0.1693 + 0.3879i 13.5 0.1222 + 0.4300i 0.1222 + 0.4272i 0.1213 + 0.4297i 0.1213 + 0.4269i 0.1716 + 0.3987i 14 0.1189 + 0.4354i 0.1187 + 0.4342i 0.1181 + 0.4360i 0.1178 + 0.4348i 0.1722 + 0.4014i 14.5 0.1162 + 0.4484i 0.1159 + 0.4493i 0.1156 + 0.4497i 0.1152 + 0.4507i 0.1751 + 0.4094i 15 0.2366 + 1.7925i 0.1132 + 1.0217i 0.1343 + 1.4263i 0.1131 + 1.0934i 0.1130 + 0.6377i 15.5 0.1057 + 0.9757i 0.1704 + 0.9162i 0.1155 + 0.9873i 0.1783 + 0.9299i 0.1349 + 0.6360i 16 0.1430 + 1.4001i 0.1156 + 1.1081i 0.1884 + 1.7333i 0.1078 + 1.0066i 0.1071 + 0.6135i 16.5 0.1053 + 1.2977i 0.1293 + 0.9737i 0.1785 + 1.2326i 0.1473 + 0.9932i 0.1149 + 0.6198i 17 0.1490 + 1.6173i 0.1183 + 0.9591i 0.1303 + 1.3054i 0.1236 + 1.0413i 0.1061 + 0.6094i 17.5 0.1411 + 1.5896i 0.1170 + 0.9512i 0.1278 + 1.2852i 0.1257 + 1.0327i 0.1004 + 0.5984i 18 0.1396 + 1.5775i 0.1131 + 0.9418i 0.1242 + 1.2789i 0.1226 + 1.0347i 0.0938 + 0.5780i 18.5 0.1401 + 1.5712i 0.1104 + 0.9411i 0.1233 + 1.2808i 0.1220 + 1.0474i 0.0863 + 0.5683i 19 0.1202 + 1.4352i 0.0996 + 1.2052i 0.2171 + 1.6874i 0.2773 + 1.1812i 0.0839 + 0.8147i 19.5 0.1542 + 1.5593i 0.0710 + 0.9899i 0.1176 + 1.2799i 0.1750 + 1.0404i 0.0755 + 0.6559i 20 0.1167 + 1.2700i 0.0962 + 1.0708i 0.1297 + 1.5321i 0.0883 + 0.8994i 0.0749 + 0.5327i 20.5 0.1161 + 1.2756i 0.0974 + 1.0790i 0.1295 + 1.5298i 0.0884 + 0.9064i 0.0720 + 0.5415i 21 0.1140 + 1.2762i 0.0978 + 1.0812i 0.1280 + 1.5231i 0.0867 + 0.9060i 0.0704 + 0.5429i 21.5 0.1108 + 1.2731i 0.0977 + 1.0794i 0.1256 + 1.5126i 0.0853 + 0.9029i 0.0694 + 0.5429i 22 0.1045 + 1.2645i 0.0959 + 1.0725i 0.1201 + 1.4962i 0.0871 + 0.8987i 0.0687 + 0.5451i 22.5 0.1015 + 1.2588i 0.0952 + 1.0704i 0.1161 + 1.4831i 0.0884 + 0.8992i 0.0685 + 0.5510i 23 0.1141 + 1.4950i 0.0679 + 0.9023i 0.1059 + 1.2572i 0.1019 + 1.0664i 0.0653 + 0.5841i 23.5 0.0985 + 1.2520i 0.0938 + 1.0710i 0.1114 + 1.4628i 0.0905 + 0.9054i 0.0693 + 0.5689i 24 0.0901 + 1.1911i 0.0801 + 1.0038i 0.1106 + 1.4060i 0.2328 + 0.9654i 0.0680 + 0.6561i 24.5 0.0894 + 1.1877i 0.0808 + 1.0036i 0.1074 + 1.3967i 0.2340 + 0.9604i 0.0695 + 0.6593i 25 0.0890 + 1.1877i 0.0816 + 1.0065i 0.1053 + 1.3909i 0.2349 + 0.9570i 0.0709 + 0.6644i 25.5 0.0889 + 1.1889i 0.0823 + 1.0105i 0.1037 + 1.3867i 0.2355 + 0.9547i 0.0721 + 0.6705i 26 0.0888 + 1.1903i 0.0829 + 1.0145i 0.1023 + 1.3833i 0.2357 + 0.9536i 0.0732 + 0.6770i w SNR w37 w38 w39 5 0.2696 + 0.4521i 0.5169 + 1.2065i 0.5169 + 1.2065i 5.5 0.2663 + 0.4530i 0.5115 + 1.2092i 0.5115 + 1.2092i 6 0.4570 + 0.2642i 0.4570 + 0.2642i 0.4570 + 0.2642i 6.5 0.5752 + 1.1632i 0.5752 + 1.1632i 0.5752 + 1.1632i 7 0.3443 + 1.1417i 0.4291 + 1.7565i 0.3631 + 1.2644i 7.5 0.2435 + 0.4714i 0.3124 + 1.0924i 0.3175 + 1.1489i 8 0.2485 + 0.4288i 0.2485 + 0.4288i 0.2729 + 0.4799i 8.5 0.2432 + 0.4300i 0.2432 + 0.4300i 0.2708 + 0.4861i 9 0.2602 + 0.6851i 0.1916 + 0.8173i 0.2857 + 0.7722i 9.5 0.2630 + 0.6841i 0.1926 + 0.8288i 0.2983 + 0.7729i 10 0.2686 − 1.3530i 0.2443 − 1.0202i 0.2449 − 1.0415i 10.5 0.2635 − 1.3614i 0.2349 − 1.0112i 0.2356 − 1.0372i 11 0.1685 + 0.3005i 0.1685 + 0.3005i 0.1671 + 0.2974i 11.5 0.1683 + 0.3032i 0.1650 + 0.2964i 0.1666 + 0.2998i 12 0.1656 + 0.3227i 0.1634 + 0.3246i 0.1636 + 0.3208i 12.5 0.1669 + 0.3598i 0.1652 + 0.3613i 0.1652 + 0.3583i 13 0.1689 + 0.3856i 0.1679 + 0.3867i 0.1675 + 0.3844i 13.5 0.1708 + 0.3972i 0.1707 + 0.3976i 0.1700 + 0.3962i 14 0.1713 + 0.4009i 0.1720 + 0.4006i 0.1711 + 0.4002i 14.5 0.1743 + 0.4102i 0.1765 + 0.4086i 0.1757 + 0.4095i 15 0.1142 + 0.7348i 0.1100 + 0.6285i 0.1120 + 0.7126i 15.5 0.1478 + 0.6586i 0.1365 + 0.6293i 0.1479 + 0.6511i 16 0.1080 + 0.7000i 0.1069 + 0.6283i 0.1060 + 0.7438i 16.5 0.1198 + 0.7262i 0.1195 + 0.6155i 0.1240 + 0.7155i 17 0.1122 + 0.7387i 0.1133 + 0.5999i 0.1188 + 0.7034i 17.5 0.1100 + 0.7473i 0.1141 + 0.5926i 0.1221 + 0.7136i 18 0.1063 + 0.7507i 0.1145 + 0.5762i 0.1223 + 0.7129i 18.5 0.1030 + 0.7613i 0.1177 + 0.5704i 0.1259 + 0.7175i 19 0.0834 + 0.9964i 0.1971 + 0.8041i 0.2436 + 0.9839i 19.5 0.0799 + 0.8133i 0.1865 + 0.6474i 0.2027 + 0.8117i 20 0.0612 + 0.6589i 0.1829 + 0.5465i 0.1233 + 0.7216i 20.5 0.0591 + 0.6728i 0.1883 + 0.5570i 0.1297 + 0.7318i 21 0.0574 + 0.6772i 0.1921 + 0.5608i 0.1353 + 0.7334i 21.5 0.0559 + 0.6795i 0.1945 + 0.5628i 0.1410 + 0.7326i 22 0.0549 + 0.6836i 0.1961 + 0.5662i 0.1487 + 0.7336i 22.5 0.0545 + 0.6912i 0.1980 + 0.5732i 0.1557 + 0.7375i 23 0.0662 + 0.7419i 0.2015 + 0.5913i 0.1899 + 0.7378i 23.5 0.0563 + 0.7102i 0.2034 + 0.5915i 0.1695 + 0.7506i 24 0.0697 + 0.8236i 0.2070 + 0.6480i 0.2108 + 0.8051i 24.5 0.0707 + 0.8259i 0.2118 + 0.6478i 0.2131 + 0.8017i 25 0.0718 + 0.8309i 0.2160 + 0.6470i 0.2150 + 0.7989i 25.5 0.0727 + 0.8369i 0.2196 + 0.6455i 0.2165 + 0.7966i 26 0.0737 + 0.8430i 0.2228 + 0.6437i 0.2175 + 0.7949i w SNR w40 w41 w42 w43 w44 5 0.2696 + 0.4521i 0.2696 + 0.4521i 0.5170 + 1.2065i 0.5170 + 1.2065i 0.2696 + 0.4521i 5.5 0.2663 + 0.4530i 0.2663 + 0.4530i 0.5115 + 1.2092i 0.5115 + 1.2092i 0.2663 + 0.4530i 6 1.2102 + 0.5067i 1.2102 + 0.5067i 1.2102 + 0.5067i 1.2102 + 0.5067i 0.4570 + 0.2642i 6.5 0.4304 + 1.2538i 0.4304 + 1.2538i 0.4304 + 1.2537i 0.4304 + 1.2537i 0.5752 + 1.1632i 7 0.5321 + 1.0488i 0.5054 + 1.0028i 0.5818 + 1.1302i 0.5321 + 1.0488i 0.3443 + 1.1417i 7.5 0.4714 + 0.2435i 0.4213 + 0.2297i 1.1489 + 0.3175i 1.2665 + 0.3279i 0.5207 + 0.2555i 8 0.2228 + 0.4230i 0.2369 + 0.4792i 0.2369 + 0.4792i 0.2486 + 0.5341i 0.2485 + 0.4288i 8.5 0.2156 + 0.4280i 0.2299 + 0.4909i 0.2299 + 0.4909i 0.2411 + 0.5508i 0.2432 + 0.4300i 9 0.1856 + 0.6747i 0.2596 + 0.6730i 0.1922 + 0.7921i 0.2849 + 0.7548i 0.1875 + 0.6772i 9.5 0.1819 + 0.6783i 0.2610 + 0.6715i 0.1923 + 0.8010i 0.2956 + 0.7536i 0.1845 + 0.6814i 10 0.9890 − 1.4799i 0.8088 − 1.2150i 0.5335 − 0.8831i 0.5486 − 0.8998i 0.8088 − 1.2150i 10.5 0.9918 − 1.4880i 0.8109 − 1.2116i 0.5320 − 0.8680i 0.5496 − 0.8870i 0.8109 − 1.2116i 11 0.1967 + 0.6516i 0.1969 + 0.6552i 0.1969 + 0.6552i 0.1972 + 0.6592i 0.3323 + 0.5926i 11.5 0.1885 + 0.6662i 0.1878 + 0.6638i 0.1877 + 0.6689i 0.1869 + 0.6663i 0.3440 + 0.5986i 12 0.1779 + 0.6841i 0.1828 + 0.6845i 0.1745 + 0.6828i 0.1793 + 0.6829i 0.3547 + 0.6009i 12.5 0.1792 + 0.7116i 0.1856 + 0.7087i 0.1709 + 0.7113i 0.1774 + 0.7076i 0.3740 + 0.6070i 13 0.1817 + 0.7335i 0.1889 + 0.7276i 0.1660 + 0.7356i 0.1734 + 0.7283i 0.3879 + 0.6101i 13.5 0.1825 + 0.7468i 0.1898 + 0.7378i 0.1588 + 0.7521i 0.1666 + 0.7410i 0.3967 + 0.6104i 14 0.1826 + 0.7535i 0.1893 + 0.7416i 0.1516 + 0.7621i 0.1596 + 0.7470i 0.4024 + 0.6084i 14.5 0.1878 + 0.7652i 0.1918 + 0.7501i 0.1441 + 0.7789i 0.1507 + 0.7597i 0.4094 + 0.6093i 15 0.6334 + 1.5624i 0.3445 + 1.0222i 0.3767 + 1.3678i 0.3375 + 1.0864i 0.3311 + 0.6416i 15.5 0.1266 + 1.3390i 0.4298 + 0.9537i 0.2698 + 1.2595i 0.4136 + 1.0326i 0.4146 + 0.6068i 16 0.4307 + 1.3657i 0.3427 + 1.0736i 0.5886 + 1.6752i 0.3211 + 0.9921i 0.3296 + 0.6232i 16.5 0.2029 + 1.6229i 0.4061 + 0.9419i 0.4138 + 1.2839i 0.3981 + 0.9966i 0.3744 + 0.6031i 17 0.4551 + 1.5890i 0.3688 + 0.9394i 0.3994 + 1.2831i 0.3584 + 1.0296i 0.3706 + 0.5982i 17.5 0.4310 + 1.5685i 0.3749 + 0.9291i 0.3899 + 1.2664i 0.3578 + 1.0211i 0.3781 + 0.5910i 18 0.4257 + 1.5553i 0.3653 + 0.9212i 0.3793 + 1.2595i 0.3474 + 1.0247i 0.3805 + 0.5765i 18.5 0.4244 + 1.5436i 0.3639 + 0.9208i 0.3774 + 1.2582i 0.3430 + 1.0368i 0.3915 + 0.5705i 19 0.7690 + 1.4112i 0.6649 + 1.1380i 0.4761 + 1.4765i 0.4596 + 1.1970i 0.4764 + 0.7356i 19.5 0.4619 + 1.4871i 0.4964 + 0.9866i 0.3490 + 1.2589i 0.3490 + 1.0371i 0.4558 + 0.6134i 20 0.3324 + 1.2294i 0.3300 + 1.0062i 0.3879 + 1.4978i 0.2451 + 0.8999i 0.4353 + 0.5950i 20.5 0.3324 + 1.2302i 0.3334 + 1.0155i 0.3846 + 1.4868i 0.2478 + 0.9074i 0.4435 + 0.6045i 21 0.3284 + 1.2285i 0.3320 + 1.0206i 0.3786 + 1.4755i 0.2471 + 0.9090i 0.4494 + 0.6106i 21.5 0.3217 + 1.2283i 0.3261 + 1.0269i 0.3716 + 1.4663i 0.2470 + 0.9085i 0.4549 + 0.6160i 22 0.3100 + 1.2397i 0.3058 + 1.0469i 0.3607 + 1.4682i 0.2567 + 0.9079i 0.4631 + 0.6208i 22.5 0.3044 + 1.2443i 0.3002 + 1.0568i 0.3505 + 1.4648i 0.2617 + 0.9117i 0.4705 + 0.6290i 23 0.3452 + 1.1540i 0.4129 + 0.9793i 0.3125 + 1.3457i 0.2563 + 0.9501i 0.4782 + 0.6393i 23.5 0.2993 + 1.2594i 0.2906 + 1.0772i 0.3403 + 1.4686i 0.2690 + 0.9234i 0.4846 + 0.6443i 24 0.4884 + 1.4147i 0.4408 + 0.9883i 0.2990 + 1.3047i 0.3098 + 1.1123i 0.5034 + 0.6582i 24.5 0.4818 + 1.4041i 0.4361 + 0.9895i 0.2934 + 1.3012i 0.3024 + 1.1113i 0.5119 + 0.6637i 25 0.4778 + 1.3940i 0.4318 + 0.9909i 0.2896 + 1.2989i 0.2959 + 1.1112i 0.5190 + 0.6693i 25.5 0.4747 + 1.3846i 0.4279 + 0.9924i 0.2865 + 1.2969i 0.2905 + 1.1114i 0.5249 + 0.6752i 26 0.4711 + 1.3764i 0.4242 + 0.9942i 0.2836 + 1.2952i 0.2860 + 1.1119i 0.5308 + 0.6813i w SNR w45 w46 w47 5 0.2696 + 0.4521i 0.5169 + 1.2065i 0.5169 + 1.2065i 5.5 0.2663 + 0.4530i 0.5115 + 1.2092i 0.5115 + 1.2092i 6 0.4570 + 0.2642i 0.4570 + 0.2642i 0.4570 + 0.2642i 6.5 0.5752 + 1.1632i 0.5752 + 1.1632i 0.5752 + 1.1632i 7 0.3344 + 1.0806i 0.3631 + 1.2644i 0.3443 + 1.1417i 7.5 0.4714 + 0.2435i 1.0924 + 0.3124i 1.1489 + 0.3175i 8 0.2729 + 0.4799i 0.2729 + 0.4799i 0.2969 + 0.5272i 8.5 0.2708 + 0.4861i 0.2708 + 0.4861i 0.2980 + 0.5370i 9 0.2626 + 0.6762i 0.1956 + 0.7959i 0.2892 + 0.7605i 9.5 0.2653 + 0.6756i 0.1970 + 0.8057i 0.3015 + 0.7610i 10 0.7657 − 1.1516i 0.5486 − 0.8998i 0.5630 − 0.9155i 10.5 0.7744 − 1.1516i 0.5496 − 0.8870i 0.5674 − 0.9058i 11 0.3347 + 0.5953i 0.3347 + 0.5953i 0.3374 + 0.5982i 11.5 0.3433 + 0.5965i 0.3466 + 0.5998i 0.3458 + 0.5975i 12 0.3593 + 0.6011i 0.3576 + 0.5990i 0.3624 + 0.5994i 12.5 0.3778 + 0.6065i 0.3777 + 0.6018i 0.3817 + 0.6013i 13 0.3903 + 0.6093i 0.3925 + 0.6005i 0.3948 + 0.5996i 13.5 0.3971 + 0.6093i 0.4022 + 0.5964i 0.4020 + 0.5952i 14 0.3991 + 0.6069i 0.4059 + 0.5914i 0.4018 + 0.5896i 14.5 0.4040 + 0.6061i 0.4153 + 0.5858i 0.4089 + 0.5826i 15 0.3353 + 0.7232i 0.3182 + 0.6339i 0.3260 + 0.7097i 15.5 0.4236 + 0.6703i 0.4011 + 0.5965i 0.4047 + 0.6466i 16 0.3421 + 0.6984i 0.3115 + 0.6358i 0.3204 + 0.7350i 16.5 0.3838 + 0.6977i 0.3484 + 0.6000i 0.3571 + 0.6873i 17 0.3667 + 0.7052i 0.3292 + 0.5917i 0.3315 + 0.6797i 17.5 0.3716 + 0.7091i 0.3216 + 0.5867i 0.3245 + 0.6863i 18 0.3633 + 0.7147i 0.3133 + 0.5726i 0.3120 + 0.6868i 18.5 0.3623 + 0.7269i 0.3080 + 0.5673i 0.3034 + 0.6934i 19 0.5686 + 0.9186i 0.3592 + 0.7734i 0.4125 + 0.9576i 19.5 0.4773 + 0.7891i 0.3323 + 0.6317i 0.3411 + 0.8066i 20 0.4122 + 0.7607i 0.3109 + 0.5751i 0.2807 + 0.7485i 20.5 0.4193 + 0.7714i 0.3125 + 0.5857i 0.2831 + 0.7571i 21 0.4225 + 0.7777i 0.3144 + 0.5907i 0.2838 + 0.7596i 21.5 0.4247 + 0.7818i 0.3170 + 0.5938i 0.2850 + 0.7600i 22 0.4319 + 0.7788i 0.3205 + 0.5962i 0.2904 + 0.7595i 22.5 0.4380 + 0.7857i 0.3259 + 0.6027i 0.2955 + 0.7625i 23 0.4531 + 0.8051i 0.3394 + 0.6131i 0.3093 + 0.7816i 23.5 0.4495 + 0.7999i 0.3381 + 0.6175i 0.3079 + 0.7726i 24 0.5007 + 0.8232i 0.3521 + 0.6461i 0.3534 + 0.7992i 24.5 0.5063 + 0.8279i 0.3591 + 0.6480i 0.3581 + 0.8012i 25 0.5110 + 0.8331i 0.3652 + 0.6503i 0.3620 + 0.8038i 25.5 0.5140 + 0.8384i 0.3704 + 0.6529i 0.3647 + 0.8068i 26 0.5155 + 0.8438i 0.3755 + 0.6565i 0.3664 + 0.8105i w SNR w48 w49 w50 w51 w52 5 0.2696 + 0.4521i 0.2696 + 0.4521i 0.5170 + 1.2065i 0.5169 + 1.2065i 0.2696 + 0.4521i 5.5 0.2663 + 0.4530i 0.2663 + 0.4530i 0.5115 + 1.2092i 0.5115 + 1.2092i 0.2663 + 0.4530i 6 0.5067 + 1.2102i 0.5067 + 1.2102i 0.5067 + 1.2102i 0.5067 + 1.2102i 0.2642 + 0.4570i 6.5 0.2553 + 0.4543i 0.2553 + 0.4543i 0.2553 + 0.4543i 0.2553 + 0.4543i 0.2699 + 0.4632i 7 0.2570 + 0.4231i 0.2737 + 0.4610i 0.2407 + 0.3854i 0.2570 + 0.4231i 0.2424 + 0.4005i 7.5 0.2297 + 0.4213i 0.2153 + 0.3744i 0.3279 + 1.2665i 0.3690 + 1.7569i 0.2435 + 0.4714i 8 0.3708 + 0.2078i 0.4230 + 0.2228i 0.4230 + 0.2228i 0.4792 + 0.2369i 0.3788 + 0.2257i 8.5 0.3693 + 0.1998i 0.4280 + 0.2156i 0.4280 + 0.2156i 0.4909 + 0.2299i 0.3747 + 0.2178i 9 0.2427 + 0.2263i 0.2838 + 0.2486i 0.2831 + 0.2190i 0.3278 + 0.2440i 0.2459 + 0.2248i 9.5 0.2335 + 0.2229i 0.2775 + 0.2471i 0.2850 + 0.2115i 0.3342 + 0.2392i 0.2370 + 0.2213i 10 0.1636 − 0.3155i 0.1635 − 0.3150i 0.2161 − 0.6148i 0.2169 − 0.6216i 0.1635 − 0.3150i 10.5 0.1570 − 0.3085i 0.1564 − 0.3061i 0.2066 − 0.6354i 0.2071 − 0.6404i 0.1564 − 0.3061i 11 0.3051 + 0.1518i 0.3018 + 0.1510i 0.3018 + 0.1510i 0.2985 + 0.1501i 0.3037 + 0.1699i 11.5 0.2979 + 0.1464i 0.3017 + 0.1473i 0.2941 + 0.1456i 0.2979 + 0.1465i 0.2972 + 0.1662i 12 0.2697 + 0.1443i 0.2704 + 0.1433i 0.2644 + 0.1442i 0.2650 + 0.1432i 0.2763 + 0.1638i 12.5 0.2423 + 0.1395i 0.2424 + 0.1389i 0.2387 + 0.1394i 0.2388 + 0.1389i 0.2516 + 0.1583i 13 0.2256 + 0.1346i 0.2253 + 0.1344i 0.2241 + 0.1346i 0.2237 + 0.1345i 0.2350 + 0.1552i 13.5 0.2177 + 0.1304i 0.2168 + 0.1304i 0.2184 + 0.1305i 0.2174 + 0.1306i 0.2264 + 0.1539i 14 0.2139 + 0.1264i 0.2129 + 0.1265i 0.2177 + 0.1267i 0.2167 + 0.1268i 0.2205 + 0.1529i 14.5 0.2048 + 0.1245i 0.2036 + 0.1246i 0.2137 + 0.1252i 0.2125 + 0.1253i 0.2114 + 0.1549i 15 0.1245 + 0.1187i 0.1244 + 0.1173i 0.1239 + 0.1191i 0.1238 + 0.1176i 0.1179 + 0.3687i 15.5 0.1162 + 0.1238i 0.1165 + 0.1240i 0.1164 + 0.1233i 0.1167 + 0.1236i 0.1232 + 0.3743i 16 0.1246 + 0.1126i 0.1236 + 0.1147i 0.1260 + 0.1137i 0.1249 + 0.1158i 0.1145 + 0.3722i 16.5 0.1108 + 0.1164i 0.1102 + 0.1224i 0.1146 + 0.1160i 0.1140 + 0.1221i 0.1117 + 0.3822i 17 0.1115 + 0.1115i 0.1120 + 0.1205i 0.1194 + 0.1109i 0.1199 + 0.1199i 0.1072 + 0.3744i 17.5 0.1091 + 0.1073i 0.1100 + 0.1219i 0.1238 + 0.1068i 0.1247 + 0.1214i 0.1034 + 0.3767i 18 0.1029 + 0.1005i 0.1036 + 0.1205i 0.1336 + 0.1000i 0.1343 + 0.1201i 0.0984 + 0.3716i 18.5 0.0939 + 0.0943i 0.0946 + 0.1241i 0.1446 + 0.0939i 0.1449 + 0.1242i 0.0911 + 0.3755i 19 0.0784 + 0.0928i 0.0827 + 0.2753i 0.0788 + 0.0929i 0.0872 + 0.2754i 0.0877 + 0.6350i 19.5 0.0788 + 0.0768i 0.0782 + 0.2154i 0.1113 + 0.0765i 0.1213 + 0.2125i 0.0760 + 0.5036i 20 0.0713 + 0.0697i 0.0711 + 0.1478i 0.2060 + 0.0687i 0.2046 + 0.1520i 0.0715 + 0.3878i 20.5 0.0696 + 0.0636i 0.0695 + 0.1639i 0.2051 + 0.0633i 0.2044 + 0.1665i 0.0700 + 0.4057i 21 0.0696 + 0.0610i 0.0696 + 0.1698i 0.2077 + 0.0610i 0.2073 + 0.1721i 0.0698 + 0.4114i 21.5 0.0707 + 0.0595i 0.0706 + 0.1722i 0.2119 + 0.0599i 0.2114 + 0.1748i 0.0701 + 0.4134i 22 0.0723 + 0.0588i 0.0719 + 0.1737i 0.2166 + 0.0598i 0.2155 + 0.1775i 0.0704 + 0.4157i 22.5 0.0730 + 0.0592i 0.0727 + 0.1768i 0.2188 + 0.0604i 0.2178 + 0.1809i 0.0710 + 0.4212i 23 0.0720 + 0.0615i 0.0717 + 0.1851i 0.2162 + 0.0625i 0.2153 + 0.1881i 0.0692 + 0.4430i 23.5 0.0735 + 0.0614i 0.0734 + 0.1846i 0.2204 + 0.0628i 0.2198 + 0.1888i 0.0720 + 0.4369i 24 0.0668 + 0.0698i 0.0669 + 0.2101i 0.2012 + 0.0697i 0.2017 + 0.2100i 0.0675 + 0.5006i 24.5 0.0679 + 0.0704i 0.0679 + 0.2120i 0.2045 + 0.0702i 0.2048 + 0.2113i 0.0689 + 0.5043i 25 0.0687 + 0.0711i 0.0686 + 0.2143i 0.2073 + 0.0705i 0.2070 + 0.2122i 0.0701 + 0.5091i 25.5 0.0699 + 0.0718i 0.0690 + 0.2167i 0.2111 + 0.0703i 0.2080 + 0.2118i 0.0711 + 0.5149i 26 0.0711 + 0.0728i 0.0687 + 0.2202i 0.2153 + 0.0697i 0.2074 + 0.2103i 0.0722 + 0.5215i w SNR w53 w54 w55 5 0.2696 + 0.4521i 0.5169 + 1.2065i 0.5169 + 1.2065i 5.5 0.2663 + 0.4530i 0.5115 + 1.2092i 0.5115 + 1.2092i 6 0.2642 + 0.4570i 0.2642 + 0.4570i 0.2642 + 0.4570i 6.5 0.2699 + 0.4632i 0.2699 + 0.4632i 0.2699 + 0.4632i 7 0.2551 + 0.4393i 0.2293 + 0.3637i 0.2424 + 0.4005i 7.5 0.2297 + 0.4213i 0.3175 + 1.1489i 0.3279 + 1.2665i 8 0.4288 + 0.2485i 0.4288 + 0.2485i 0.4799 + 0.2729i 8.5 0.4300 + 0.2432i 0.4300 + 0.2432i 0.4861 + 0.2708i 9 0.2871 + 0.2468i 0.2869 + 0.2171i 0.3312 + 0.2418i 9.5 0.2813 + 0.2455i 0.2895 + 0.2096i 0.3382 + 0.2371i 10 0.1634 − 0.3145i 0.2169 − 0.6216i 0.2176 − 0.6290i 10.5 0.1557 − 0.3037i 0.2071 − 0.6404i 0.2075 − 0.6460i 11 0.3007 + 0.1685i 0.3007 + 0.1685i 0.2977 + 0.1671i 11.5 0.3006 + 0.1678i 0.2937 + 0.1646i 0.2971 + 0.1662i 12 0.2768 + 0.1626i 0.2715 + 0.1630i 0.2719 + 0.1618i 12.5 0.2517 + 0.1576i 0.2482 + 0.1578i 0.2483 + 0.1571i 13 0.2347 + 0.1549i 0.2335 + 0.1550i 0.2331 + 0.1547i 13.5 0.2255 + 0.1538i 0.2269 + 0.1542i 0.2260 + 0.1541i 14 0.2196 + 0.1529i 0.2239 + 0.1539i 0.2230 + 0.1539i 14.5 0.2104 + 0.1549i 0.2194 + 0.1573i 0.2184 + 0.1573i 15 0.1194 + 0.3492i 0.1158 + 0.3713i 0.1175 + 0.3517i 15.5 0.1224 + 0.3681i 0.1248 + 0.3757i 0.1240 + 0.3695i 16 0.1158 + 0.3451i 0.1155 + 0.3659i 0.1168 + 0.3397i 16.5 0.1114 + 0.3519i 0.1161 + 0.3836i 0.1157 + 0.3531i 17 0.1092 + 0.3378i 0.1154 + 0.3802i 0.1176 + 0.3422i 17.5 0.1065 + 0.3301i 0.1187 + 0.3819i 0.1221 + 0.3339i 18 0.1017 + 0.3147i 0.1253 + 0.3759i 0.1301 + 0.3177i 18.5 0.0942 + 0.3061i 0.1336 + 0.3799i 0.1399 + 0.3092i 19 0.0879 + 0.4564i 0.1446 + 0.6281i 0.1074 + 0.4545i 19.5 0.0772 + 0.3648i 0.1642 + 0.4957i 0.1421 + 0.3594i 20 0.0710 + 0.2879i 0.1957 + 0.3967i 0.2012 + 0.2903i 20.5 0.0696 + 0.2929i 0.1995 + 0.4139i 0.2029 + 0.2955i 21 0.0697 + 0.2939i 0.2034 + 0.4201i 0.2063 + 0.2971i 21.5 0.0705 + 0.2935i 0.2066 + 0.4231i 0.2100 + 0.2979i 22 0.0713 + 0.2939i 0.2086 + 0.4265i 0.2132 + 0.3001i 22.5 0.0721 + 0.2976i 0.2107 + 0.4330i 0.2155 + 0.3047i 23 0.0709 + 0.3116i 0.2088 + 0.4508i 0.2131 + 0.3169i 23.5 0.0730 + 0.3094i 0.2145 + 0.4495i 0.2184 + 0.3170i 24 0.0672 + 0.3530i 0.2047 + 0.4981i 0.2028 + 0.3524i 24.5 0.0683 + 0.3561i 0.2088 + 0.4995i 0.2060 + 0.3542i 25 0.0690 + 0.3598i 0.2121 + 0.5000i 0.2083 + 0.3552i 25.5 0.0694 + 0.3642i 0.2146 + 0.4990i 0.2095 + 0.3547i 26 0.0699 + 0.3698i 0.2171 + 0.4970i 0.2104 + 0.3528i w SNR w56 w57 w58 w59 w60 5 0.2696 + 0.4521i 0.2696 + 0.4521i 0.5170 + 1.2065i 0.5170 + 1.2065i 0.2696 + 0.4521i 5.5 0.2663 + 0.4530i 0.2663 + 0.4530i 0.5115 + 1.2092i 0.5115 + 1.2092i 0.2663 + 0.4530i 6 0.5067 + 1.2102i 0.5067 + 1.2102i 0.5067 + 1.2102i 0.5067 + 1.2102i 0.2642 + 0.4570i 6.5 0.2553 + 0.4543i 0.2553 + 0.4543i 0.2553 + 0.4543i 0.2553 + 0.4543i 0.2699 + 0.4632i 7 0.2737 + 0.4610i 0.2897 + 0.4968i 0.2571 + 0.4231i 0.2737 + 0.4610i 0.2551 + 0.4393i 7.5 0.4213 + 0.2297i 0.3744 + 0.2153i 1.2665 + 0.3279i 1.7569 + 0.3690i 0.4714 + 0.2435i 8 0.4230 + 0.2228i 0.4792 + 0.2369i 0.4792 + 0.2369i 0.5341 + 0.2486i 0.4288 + 0.2485i 8.5 0.4280 + 0.2156i 0.4909 + 0.2299i 0.4909 + 0.2299i 0.5508 + 0.2411i 0.4300 + 0.2432i 9 0.2535 + 0.2242i 0.2958 + 0.2464i 0.2959 + 0.2162i 0.3401 + 0.2408i 0.2568 + 0.2226i 9.5 0.2466 + 0.2220i 0.2928 + 0.2463i 0.3019 + 0.2094i 0.3505 + 0.2369i 0.2504 + 0.2203i 10 0.1777 − 0.3146i 0.1775 − 0.3142i 0.3118 − 0.5742i 0.3157 − 0.5798i 0.1775 − 0.3142i 10.5 0.1726 − 0.3073i 0.1716 − 0.3050i 0.3219 − 0.5854i 0.3250 − 0.5893i 0.1716 − 0.3050i 11 0.6517 + 0.1968i 0.6553 + 0.1969i 0.6553 + 0.1970i 0.6593 + 0.1971i 0.5926 + 0.3323i 11.5 0.6651 + 0.1874i 0.6629 + 0.1867i 0.6676 + 0.1867i 0.6652 + 0.1860i 0.5987 + 0.3415i 12 0.6488 + 0.1696i 0.6462 + 0.1706i 0.6456 + 0.1745i 0.6431 + 0.1753i 0.5854 + 0.3186i 12.5 0.6316 + 0.1560i 0.6315 + 0.1561i 0.6247 + 0.1604i 0.6248 + 0.1604i 0.5783 + 0.3024i 13 0.6170 + 0.1462i 0.6194 + 0.1456i 0.6069 + 0.1499i 0.6096 + 0.1493i 0.5711 + 0.2953i 13.5 0.6100 + 0.1390i 0.6146 + 0.1379i 0.5973 + 0.1418i 0.6021 + 0.1407i 0.5671 + 0.2989i 14 0.6083 + 0.1348i 0.6131 + 0.1340i 0.5937 + 0.1359i 0.5986 + 0.1351i 0.5634 + 0.3136i 14.5 0.6021 + 0.1286i 0.6083 + 0.1281i 0.5829 + 0.1293i 0.5889 + 0.1287i 0.5602 + 0.3179i 15 0.3704 + 0.1254i 0.3712 + 0.1251i 0.3655 + 0.1247i 0.3663 + 0.1243i 0.3507 + 0.3864i 15.5 0.3691 + 0.1161i 0.3726 + 0.1149i 0.3462 + 0.1176i 0.3495 + 0.1166i 0.3880 + 0.3542i 16 0.3798 + 0.1221i 0.3814 + 0.1262i 0.3718 + 0.1223i 0.3734 + 0.1263i 0.3551 + 0.3930i 16.5 0.3595 + 0.1122i 0.3649 + 0.1166i 0.3317 + 0.1131i 0.3362 + 0.1181i 0.3658 + 0.3713i 17 0.3728 + 0.1147i 0.3680 + 0.1240i 0.3411 + 0.1128i 0.3369 + 0.1221i 0.3747 + 0.3766i 17.5 0.3820 + 0.1125i 0.3761 + 0.1279i 0.3399 + 0.1094i 0.3352 + 0.1245i 0.3834 + 0.3812i 18 0.4034 + 0.1051i 0.3990 + 0.1268i 0.3351 + 0.1017i 0.3324 + 0.1227i 0.3940 + 0.3783i 18.5 0.4172 + 0.0983i 0.4129 + 0.1333i 0.3295 + 0.0948i 0.3269 + 0.1276i 0.4055 + 0.3867i 19 0.2459 + 0.0870i 0.2683 + 0.2541i 0.2324 + 0.0875i 0.2491 + 0.2574i 0.3841 + 0.5754i 19.5 0.3357 + 0.0722i 0.3554 + 0.1787i 0.2645 + 0.0759i 0.2773 + 0.1974i 0.4211 + 0.4555i 20 0.4915 + 0.0675i 0.4864 + 0.1749i 0.3507 + 0.0674i 0.3479 + 0.1618i 0.4601 + 0.4402i 20.5 0.4886 + 0.0646i 0.4846 + 0.1827i 0.3469 + 0.0633i 0.3450 + 0.1729i 0.4639 + 0.4505i 21 0.4930 + 0.0636i 0.4893 + 0.1869i 0.3495 + 0.0617i 0.3478 + 0.1777i 0.4697 + 0.4569i 21.5 0.5002 + 0.0638i 0.4966 + 0.1905i 0.3552 + 0.0612i 0.3533 + 0.1810i 0.4764 + 0.4630i 22 0.5063 + 0.0651i 0.5034 + 0.1956i 0.3611 + 0.0619i 0.3592 + 0.1852i 0.4850 + 0.4713i 22.5 0.5098 + 0.0662i 0.5076 + 0.1992i 0.3641 + 0.0628i 0.3625 + 0.1888i 0.4912 + 0.4790i 23 0.5089 + 0.0667i 0.5074 + 0.2012i 0.3614 + 0.0643i 0.3600 + 0.1938i 0.4951 + 0.4835i 23.5 0.5134 + 0.0686i 0.5133 + 0.2063i 0.3668 + 0.0653i 0.3660 + 0.1965i 0.5011 + 0.4924i 24 0.4796 + 0.0697i 0.4800 + 0.2104i 0.3382 + 0.0697i 0.3390 + 0.2100i 0.4925 + 0.5035i 24.5 0.4861 + 0.0706i 0.4859 + 0.2131i 0.3435 + 0.0702i 0.3439 + 0.2114i 0.5003 + 0.5082i 25 0.4922 + 0.0714i 0.4900 + 0.2154i 0.3482 + 0.0705i 0.3474 + 0.2123i 0.5068 + 0.5129i 25.5 0.5014 + 0.0721i 0.4909 + 0.2174i 0.3548 + 0.0706i 0.3488 + 0.2127i 0.5120 + 0.5180i 26 0.5101 + 0.0730i 0.4897 + 0.2198i 0.3616 + 0.0709i 0.3479 + 0.2135i 0.5175 + 0.5233i w SNR w61 w62 w63 5 0.2696 + 0.4521i 0.5170 + 1.2065i 0.5169 + 1.2065i 5.5 0.2663 + 0.4530i 0.5115 + 1.2092i 0.5115 + 1.2092i 6 0.2642 + 0.4570i 0.2642 + 0.4570i 0.2642 + 0.4570i 6.5 0.2699 + 0.4632i 0.2699 + 0.4632i 0.2699 + 0.4632i 7 0.2668 + 0.4777i 0.2424 + 0.4005i 0.2551 + 0.4393i 7.5 0.4213 + 0.2297i 1.1489 + 0.3175i 1.2665 + 0.3279i 8 0.4799 + 0.2729i 0.4799 + 0.2729i 0.5272 + 0.2969i 8.5 0.4861 + 0.2708i 0.4861 + 0.2708i 0.5370 + 0.2980i 9 0.2992 + 0.2445i 0.2999 + 0.2142i 0.3435 + 0.2384i 9.5 0.2968 + 0.2446i 0.3066 + 0.2074i 0.3545 + 0.2345i 10 0.1773 − 0.3138i 0.3157 − 0.5798i 0.3199 − 0.5859i 10.5 0.1707 − 0.3028i 0.3250 − 0.5893i 0.3285 − 0.5937i 11 0.5953 + 0.3347i 0.5953 + 0.3347i 0.5983 + 0.3373i 11.5 0.5967 + 0.3408i 0.5999 + 0.3441i 0.5977 + 0.3433i 12 0.5862 + 0.3167i 0.5864 + 0.3275i 0.5873 + 0.3254i 12.5 0.5798 + 0.3002i 0.5773 + 0.3109i 0.5787 + 0.3085i 13 0.5733 + 0.2925i 0.5681 + 0.3029i 0.5702 + 0.3000i 13.5 0.5699 + 0.2952i 0.5622 + 0.3050i 0.5648 + 0.3012i 14 0.5659 + 0.3081i 0.5560 + 0.3149i 0.5581 + 0.3094i 14.5 0.5630 + 0.3124i 0.5492 + 0.3184i 0.5514 + 0.3131i 15 0.3567 + 0.3730i 0.3413 + 0.3842i 0.3479 + 0.3703i 15.5 0.3859 + 0.3426i 0.3721 + 0.3619i 0.3694 + 0.3510i 16 0.3657 + 0.3748i 0.3422 + 0.3818i 0.3526 + 0.3629i 16.5 0.3698 + 0.3435i 0.3402 + 0.3754i 0.3436 + 0.3473i 17 0.3717 + 0.3453i 0.3348 + 0.3800i 0.3339 + 0.3472i 17.5 0.3805 + 0.3416i 0.3287 + 0.3836i 0.3290 + 0.3417i 18 0.3941 + 0.3266i 0.3224 + 0.3797i 0.3242 + 0.3257i 18.5 0.4070 + 0.3192i 0.3165 + 0.3859i 0.3192 + 0.3168i 19 0.3150 + 0.4197i 0.3139 + 0.6000i 0.2782 + 0.4299i 19.5 0.3908 + 0.3235i 0.3141 + 0.4762i 0.2975 + 0.3417i 20 0.4756 + 0.3132i 0.3316 + 0.4177i 0.3417 + 0.2995i 20.5 0.4766 + 0.3165i 0.3324 + 0.4313i 0.3406 + 0.3039i 21 0.4820 + 0.3193i 0.3355 + 0.4373i 0.3439 + 0.3060i 21.5 0.4895 + 0.3231i 0.3397 + 0.4416i 0.3490 + 0.3083i 22 0.4975 + 0.3302i 0.3439 + 0.4470i 0.3544 + 0.3131i 22.5 0.5027 + 0.3358i 0.3482 + 0.4545i 0.3582 + 0.3185i 23 0.5034 + 0.3391i 0.3505 + 0.4649i 0.3566 + 0.3265i 23.5 0.5105 + 0.3465i 0.3558 + 0.4698i 0.3634 + 0.3304i 24 0.4833 + 0.3548i 0.3463 + 0.4979i 0.3414 + 0.3526i 24.5 0.4895 + 0.3586i 0.3523 + 0.4998i 0.3464 + 0.3545i 25 0.4941 + 0.3621i 0.3574 + 0.5015i 0.3500 + 0.3558i 25.5 0.4965 + 0.3657i 0.3613 + 0.5034i 0.3518 + 0.3569i 26 0.4992 + 0.3698i 0.3655 + 0.5062i 0.3537 + 0.3587i

›DESCRIPTION OF THE EMBODIMENTS · 8 of 8

e) 1 kQQAM-AWGN Channel

Next, a definition of the QQAM constellation shall be provided. Each input cell word (y 0 , . . . , y m-1 ) shall be modulated using a non-uniform QQAM constellations to give a constellation point zq prior to normalization, where m corresponds to the number of bits per QAM symbol m=log 2 (M). The vector of complex constellation points x 0 . . . M-1 for all combinations of the input bits y 0 . . . m-1 (corresponding to the decimal values 0 to M-1) are given in the above shown tables for the various constellation sizes depending on the QQAM position vector w 0 . . . b-1 , which defines the constellation point positions of a first quadrant of the non-uniform constellation. The length b of the QQAM position vector w is defined by b=M/4. The QQAM position vector defines a first quadrant of the constellation (e.g. representing the first quadrant of a cartesian coordinate system according to which the constellation is oriented), namely the constellation points with the decimal values 0 (e.g. y 0 . . . m =0000 in case of a 16-QQAM) to b-1 (e.g. y 0 . . . m =0011 in case of a 16-QQAM), while the constellation points of the remaining quadrants are derived as follows:

x 0 . . . b-1 =w 0 . . . b-1 (1. quadrant I)

x b . . . 2b-1 =conj( w 0 . . . b-1 ) (2. quadrant II)

x 2b . . . 3b-1 =−conj(w 0 . . . b-1 ) (4. quadrant IV)

x 3b . . . 4b-1 =−w 0 . . . b-1 (3. quadrant III)

with conj being the complex conjugate. For example, for SNR=2 dB, the corresponding constellation point z q for a 16-QQAM defined by the QQAM position vector (w 0 . . . 3 )=(0.5879+0.4053i, 1.0566+0.6114i, 0.4053+0.5879i, 0.6114+1.0566i) and the input cell word (y 0 . . . y m-1 )=(1100) is x 12 =−w 0 /=−0.5879−0.4053i. The complete constellation for this NUC position vector for SNR=2 dB for 16-QQAM is shown in the FIG. 9 with all input cell words marked at the corresponding constellation points.

As mentioned above the constellation position vector w as defined herein does not necessarily contain the constellation points of the first quadrant of the constellation, but could also contain the constellation points of any of the four quadrants. Due to the quadrant symmetry this leads to constellations with a different bit mapping but with identical performance. The constellation position vector w in the tables defined herein should therefore be considered as an example for all four symmetric constellations with different bit mapping but identical performance.

Obviously, numerous modifications and variations of the present disclosure are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the disclosure may be practiced otherwise than as specifically described herein(e.g., if the NUC position vectors are rounded to a smaller number of digits).

In the claims, the word “comprising” does not exclude other elements or steps, and the indefinite article “a” or “an” does not exclude a plurality. A single element or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

In so far as embodiments of the disclosure have been described as being implemented, at least in part, by software-controlled data processing apparatus, it will be appreciated that a non-transitory machine-readable medium carrying such software, such as an optical disk, a magnetic disk, semiconductor memory or the like, is also considered to represent an embodiment of the present disclosure. Further, such a software may also be distributed in other forms, such as via the Internet or other wired or wireless telecommunication systems.

A circuit that may be used for implementing one or more of the elements of the claimed apparatus is a structural assemblage of electronic components including conventional circuit elements, integrated circuits including application specific integrated circuits, standard integrated circuits, application specific standard products, and field programmable gate arrays. Further a circuit includes central processing units, graphics processing units, and microprocessors which are programmed or configured according to software code. A circuit does not include pure software, although a circuit includes the above-described hardware executing software.

Any reference signs in the claims should not be construed as limiting the scope.

Claims as granted

21 claims

Classifications

5 codes

IPC · International Patent Classification

Section H — Electricity

H04L27/34
H04L1/00
H03M13/35
H03M13/25
H04L27/36

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this application are not paired with the granted ones in what we hold.

File wrapper

⤢ drag to zoom

USPTOApplicanthover for detail · click to open

Pendency

2.0 y

718 days filing → grant

Office actions

non-final + final

Responses

no RCE

Examiner

Kevin M Burd

art unit 2632 · TC 2600

Law firm

Law firm · Log in to unlock

Citations: 67 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Documents

Log in to open the documents of this file: the application as filed, every office action and response, the notice of allowance.

Chain of title

⤢ drag to zoom

Titlehover for detail · click to open

See the full assignment history — every owner this patent has passed through, with recordation dates and reel/frame numbers.