Method and apparatus for crest factor reduction

摘要

The invention provides apparatuses and method for crest factor reduction. In one embodiment, an apparatus comprising: a plurality of peak detectors respectively corresponding to a plurality of paths, each peak detector detecting a peak from an input signal; a statistical multiplexer, statistically multiplexing the peaks from the plurality of peak detectors; an allocator, allocating one of the multiplexed peaks to one of a plurality of peak cancellation units; the plurality of peak cancellation units, each generating, for an allocated peak, a cancellation peak; a plurality of de-multiplexers respectively corresponding to the plurality of peak cancellation units, each de-multiplexing the cancellation peak onto a corresponding path; a plurality of summation units respectively corresponding to the plurality of paths, each summing the de-multiplexed cancellation peaks on one path; and a plurality of subtraction units, each subtracting the summed cancellation peaks from the input signal on the path to obtain a peak-cancelled signal.

主权项

1. An apparatus for crest factor reduction, comprising:
a plurality of peak detectors respectively corresponding to a plurality of paths, each peak detector being configured for detecting a peak from one input signal on one corresponding path of the plurality of paths; a statistical multiplexer, configured for statistically multiplexing the peaks from the plurality of peak detectors; an allocator, configured for allocating one of the multiplexed peaks to one of a plurality of peak cancellation units; the plurality of peak cancellation units, each configured for generating, for an allocated peak, a cancellation peak; a plurality of de-multiplexers respectively corresponding to the plurality of peak cancellation units, each de-multiplexer being configured for de-multiplexing an cancellation peak onto one corresponding path of the plurality of paths; a plurality of summation units respectively corresponding to the plurality of paths, each configured for summing the de-multiplexed cancellation peaks on one corresponding path of the plurality of paths; and a plurality of subtraction units corresponding to the plurality of paths, each configured for subtracting the summed cancellation peaks from one of the input signals on one corresponding path of the plurality of paths to obtain a peak-cancelled signal.