Method and apparatus for reducing transmitter peak power...

Pulse or digital communications – Transmitters – Antinoise or distortion

Reexamination Certificate

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Reexamination Certificate

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07012970

ABSTRACT:
A peak to average reduction apparatus and method thereof for reducing peak power requirements of a multi-channel transmitter is discussed. The apparatus includes: a Fourier Transform Matrix (FTM) coupled to one or more input signals for providing a plurality of output signals each comprising a combination of phase shifted versions of the one or more input signals; and a processing unit coupled to the output signals for limiting a peak value for each of the output signals to provide a plurality of peak limited output signals, wherein the peak limited output signals are suitable for generating a plurality of signals for driving the multi-channel transmitter. A transmitter further includes a power amplifier having a plurality of amplifiers coupled to these signals, each amplifier coupled to a one of the signals that correspond to one of the peak limited output signals to provide an amplified output signal, wherein the plurality of amplifiers provide a plurality of amplified output signals; and a radio frequency FTM coupled to the amplified output signals to provide one or more transmit signals corresponding one to one with the input signals.

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patent: 6381212 (2002-04-01), Larkin
patent: 2002/0118767 (2002-08-01), Ylamurto
patent: 0966099 (1999-12-01), None

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