Block-based crest factor reduction

摘要

A method and apparatus for a radio base station (200) generates a multicarrier communication signal having a reduced crest factor by processing a block of samples (231) with a peak search window (271) to identify and suppress signal peaks exceeding a power threshold value.

主权项

1. An apparatus for generating a communication signal having a reduced crest factor, comprising:
a sampling block memory for storing a block of input samples from a multicarrier communication signal; and a crest factor reduction block coupled to the sampling block memory for performing block-based processing to detect one or more signal peaks in the block of input samples stored in the sampling block memory which exceed a specified power threshold, and to cancel at least a first selected signal peak selected from the one or more signal peaks by applying a first cancellation pulse to the block of input samples stored in the sampling block memory which is phase-aligned with the selected signal peak, where the crest factor reduction block is configured to use a first predetermined cancellation criterion to implement a minimum separation distance between any cancelled signal peaks.