基于非线性压扩的降低OFDM信号PAPR的算法

Nonlinear Companding Method for Reducing Peak-to-Average Power Ratio of OFDM Signals

本文在分析高PAPR形成的原因及常用的解决方法的基础上,提出了一种新的基于信号压扩的算法。通过处理后的信号与原信号在时域和频域的对比证明了本文提出的算法的正确性,并通过与其它方法的比较体现了本文算法的优势。

How to reduce the Peak - to - Average Power Ratio （PAPR） in Orthogonal Frequency Division Multiplexing （OFDM） signals has become one of the key problems in OFDM system. By analyzing the reason of high PAPR, a new nonlinear companding method is proposed to reduce the PAPR. Then we give the optimal value of the parameter in this scheme. At last, our simulation results confirm that the suggested scheme exhibits good performances in both time and frequency fields by comparing with other method.