Telecommunications – Transmitter – Plural separate transmitters or channels
Reexamination Certificate
2005-03-22
2005-03-22
Chin, Vivian (Department: 2682)
Telecommunications
Transmitter
Plural separate transmitters or channels
C455S105000, C455S127100, C455S127200, C455S561000
Reexamination Certificate
active
06871049
ABSTRACT:
Systems and methods for optimizing the efficiency of each of a plurality of power amplifiers that amplify a corresponding one of a plurality of radio frequency signals for transmission by a corresponding one of a plurality of antennas. Using transmit beamforming, the power of each amplified signal output by the power amplifiers may not be the same for all the power amplifiers, and may vary with changes in the communication channel between the transmitting device and receiving device. Each of the plurality of power amplifiers is controlled to operate with one or more operating parameters that optimize the efficiency for an output power level of corresponding ones of the radio frequency signals. By adjusting one or more operating parameters of each power amplifier according to changing requirements (e.g., the destination device and channel conditions), the efficiency of each power amplifier can be optimized. Consequently, one or more of the power amplifiers are operated with one or more operating parameters that reflects the output power actually needed for the corresponding radio frequency signal to be transmitted.
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PCT Search Report from counterpart PCT application No. PCT/US03/07561 filed Mar. 13, 2003.
Luo Sifen
Sugar Gary L.
Vaidyanathan Chandra
Chin Vivian
Cognio, Inc.
Floam, Esq. D. Andrew
Persino Raymond B.
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