A method of tuning a station is disclosed, wherein a first pilot signal is applied on a circuit of the station and the resulting output power of the signal circuit is subsequently detected. A second pilot signal is then applied to the circuit and the resulting output power of the circuit is detected. The offset of the circuit is then tuned based on information of the resulting output power detected for the first and second signals. A station that is adapted to implement the method may be tuned by the manufacturer thereof or later after having already been taken into use. The tuning may occur automatically as response to a predefined event.

Claims

51 · 2 independent · depth 6

51 granted claims

›1.independentA method of tuning a station, the method comprising:na) applying a first signal to a first input of a circuit of the station and subsequently detectin…+31

›2.↳ 1The method of claim 1, wherein steps a) to c) are repeated at least once.d2+2

›3.↳ 1The method of claim 1, wherein the signal comprises a reference voltage.d2+1

›5.↳ 1The method of claim 1, wherein said signal is a pilot signal.d2

›8.↳ 1The method of claim 1, wherein the offset is tuned until substantially equal resulting output power is detected subsequent to the application of said …d2

›9.↳ 1The method of claim 1, wherein the output power comprise output power of modulator means of the circuit.d2

›10.↳ 1The method of claim 1, wherein the tuning is accomplished based on the difference determined for the resulting output power in steps a) and b).d2

›11.↳ 1The method of claim 1, wherein the circuit comprises at least one of an in-phase (I) branch and a quadrature phase (Q) branch of an IQ modulator for a…d2+1

›13.↳ 1The method of claim 1, wherein the output power are detected by envelope detector means.d2

›14.↳ 1The method of claim 1, wherein the tuning is based on information regarding detected carrier leakage in the station.d2

›15.↳ 1The method of claim 1, wherein at least one further error is compensated by tuning the station.d2

›16.↳ 1The method of claim 1, wherein the tuning is controlled by a digital signal processor.d2

›17.↳ 1The method of claim 1, wherein the station comprises a mobile station of a cellular communication system.d2+9

›18.↳ 17The method of claim 17, wherein the tuning is accomplished during the manufacture of the mobile station.d3+4

›19.↳ 17The method of claim 17, wherein the tuning is accomplished in response to an event after the mobile station has been taken in use.d3+3

›27.↳ 1The method of claim 1, wherein the first pilot signal is selected such that the tuning of the station does not substantially interfere with the operat…d2

›28.↳ 1The method of claim 1, wherein said offset is an DC offset.d2

›29.↳ 1The method of claim 1, wherein said offset is a gain offset.d2

›48.↳ 1The method of claim 1, further comprising:nd) compensating phase offset of the circuit based on information of the resulting output power detected in …d2+2

›30.independentA station comprising:na modulator circuit including at least a first input and at least one component for subjecting a signal applied to said first in…+18

›31.↳ 30The station of claim 30, wherein the station comprises a mobile station for communication via a cellular communication system.d2+7

›32.↳ 30The station of claim 30, wherein the modulator circuit comprises at least one of an in-phase (I) signal branch and a quadrature phase (Q) signal branc…d2+3

›34.↳ 30The station of claim 30, wherein the detector means comprise an envelope detector.d2+1

›38.↳ 30The station of claim 30, further comprising a digital signal processor adapted for controlling the tuning of the station.d2

›46.↳ 30The station of claim 30, wherein the station is adapted to tune itself in response to an event.d2+1

›51.↳ 30The station of claim 30, further comprising:nmeans for tuning a phase offset of the modulator circuit based on information of said output power detect…d2

Classifications

6 codes

IPC · International Patent Classification

Section H — Electricity

H04B1/40

USPC · US Patent Classification

455/77375/130455/161.1455/166.1375/141

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Type	Document	Date
related publication	US 20030053561 A1	20 Mar 2003

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