Method and apparatus for crest factor reduction

Abstract

An apparatus and method for performing crest factor reduction (CFR). A peak detection circuit detects peaks from input signal samples based on a first threshold. The first threshold is higher than a second threshold that is determined based on a target peak-to-average power ratio (PAPR). A gain computation circuit determines a gain factor for at least one detected peak. A scaled cancellation pulse generation circuit generates a scaled cancellation pulse for the at least one detected peak based on the gain factor. A combiner circuit combines the scaled cancellation pulse with the input signal samples to generate an output signal. A hard clipping circuit may compress the output signal based on the second threshold. The first threshold is set slightly higher than the second threshold.

Dependencies are inferred from the claim text.