Telecommunications – Transmitter – Plural separate transmitters or channels
Reexamination Certificate
2006-08-31
2009-08-11
Le, Thanh C (Department: 2618)
Telecommunications
Transmitter
Plural separate transmitters or channels
C455S561000
Reexamination Certificate
active
07574181
ABSTRACT:
System and method for preprocessing a signal for transmission by a power amplifier. In a preferred embodiment a multiple input multiple output processor is coupled to a plurality of power amplifiers for transmitting a signal, where the number of power amplifiers exceeds the number of antennas. The multiple input multiple output processor performs an algorithm to optimize the output vector ensuring that the transmit power for any one amplifier is below a predetermined threshold. In a preferred embodiment a Remez optimization algorithm is performed. Alternative optimization algorithms may be used. In a preferred embodiment the processor is a single integrated circuit. A method is disclosed where a multiple output vector is produced for transmission, using an optimization algorithm to produce an output vector that ensures that for any of the power amplifiers, the transmit power is maintained below a predetermined threshold.
REFERENCES:
patent: 5163181 (1992-11-01), Koontz
patent: 2004/0014500 (2004-01-01), Chun
patent: 2006/0116087 (2006-06-01), Sugar et al.
Brady III Wade J.
Le Thanh C
Patti John J.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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