Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2006-03-14
2006-03-14
Bocure, Tesfaldet (Department: 2631)
Pulse or digital communications
Transmitters
Antinoise or distortion
Reexamination Certificate
active
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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Franson Glen A.
Greenwood William C.
Porco Ronald L.
Bocure Tesfaldet
Wills Kevin D.
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