A disclosed radio communication apparatus transmits a radio signal to multiple users via multiple transmit antenna groups at appropriate transmit power levels, each of the transmit antenna groups including one or more transmit antennas, the transmit antenna groups having respective transmit power constraints. The apparatus includes a precoding unit configured to perform precoding on signals modulated for individual users and generate transmit weights, an optimum transmit power calculation unit configured to receive the transmit weights from the precoding unit and use components of the transmit weights and respective transmit power limit values for the transmit antenna groups to calculate an initial value for a transmit power optimization problem for calculation of the appropriate transmit power levels for the users, and a transmission unit configured to transmit radio signals at the calculated transmit power levels.

Claims

14 · 2 independent · depth 3

14 granted claims

›1.independentA radio communication apparatus for transmitting a radio signal to multiple users via multiple transmit antenna groups at appropriate transmit power l…+6

›2.↳ 1The radio communication apparatus as claimed in claim 1, wherein the initial value comprises a minimum of values for the transmit antenna groups, the …d2

›3.↳ 1The radio communication apparatus as claimed in claim 1, wherein the optimum transmit power calculation unit is configured to use the interior point m…d2+2

›6.↳ 1The radio communication apparatus as claimed in claim 1, wherein the optimum transmit power calculation unit is configured to perform optimization und…d2

›7.↳ 1The radio communication apparatus as claimed in claim 1, wherein the optimum transmit power calculation unit is configured to perform optimization und…d2

›8.independentA radio communication method for transmitting a radio signal to multiple users via multiple transmit antenna groups at appropriate transmit power leve…+6

›9.↳ 8The radio communication method as claimed in claim 8, wherein the initial value comprises a minimum of values for the transmit antenna groups, the val…d2

›10.↳ 8The radio communication method as claimed in claim 8, wherein the calculation comprises using the interior point method combined with a steepest desce…d2+2

›13.↳ 8The radio communication method as claimed in claim 8, wherein the calculation comprises performing optimization under the constraints to make respecti…d2

›14.↳ 8The radio communication method as claimed in claim 8, wherein the calculation comprises performing optimization under the constraints to maximize chan…d2

Classifications

4 codes

IPC · International Patent Classification

Section H — Electricity

H04B1/04

USPC · US Patent Classification

455/127.2455/103455/522

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Pendency

3.6 y

1,315 days filing → grant

Office actions

non-final + final

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no RCE

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Examiner

Lincoln Donovan

art unit 2816 · TC 2800

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Citations: 8 back · 0 forward

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20090280760 A1	12 Nov 2009

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