幅值压扩降低OFDM信号峰均比方法研究

摘要

传统的正交频分复用系统因其高峰值特性,在其信号经过放大器时会产生较大的非线性失真,从而影响系统的工作效率.本文针对正交频分复用系统的高峰值,提出了一种基于大信号幅值压扩从而降低OFDM 信号峰均比的方法.系统仿真验证了本方法的有效性,且与其他同类方法相比,本方法具有更低的误码率与更好的抑制高峰值效果.%High peak to average power ratio reduces the efficiency of the orthogonal frequency division multiplexing(OFDM)system and produces more nonlinear distortion,especially in the presence of power amplifier.In this paper,a new companding method is proposed to reduce the PAPR of OFDM signals.System simulation verifies the effectiveness of this method.Compared with other PAPR methods,our method has lower error rate and better suppression of peak value.