Methods and systems for beam steering crest factor reduction (CFR) clip noise

摘要

Signal-to-noise ratios (SNRs) and/or amplifier performance can be improved in crest factor reduction (CFR) applications by steering clipping noise in a different direction than the data signal achieving upon reception. Indeed, using clipping noise signals that have a different amplitude-phase relationship than the input/baseline signal causes the clipping noise signal and data signal to exhibit different antenna patterns, effectively steering the clipping noise in a different direction than the data signal. For instance, clipping noise can be steered away from potential receivers to improve received signal quality. In addition, higher magnitude clipping noise can be used to achieve improved power amplifier performance without increasing received SNR.

主权项

1. A method for crest factor reduction (CFR), the method comprising:
receiving an input signal having an initial magnitude exceeding a CFR threshold; and introducing a clipping noise signal into the input signal to produce an output signal having a resulting magnitude that is less than or equal to the CFR threshold, wherein the clipping noise signal and the input signal have different amplitude-phase relationships such that a resulting phase of the output signal differs from an initial phase of the input signal, and wherein the clipping noise signal has a different phase than the input signal.