正交频分复用信号峰值因子及包络变化特性研究Crest Factor and Envelope Variance Properties of OFDM Signal
张琛,陈洪,张尔扬
摘要(Abstract)：
正交频分复用(OFDM)技术的一个主要缺点是信号包络动态变化较大,在符号周期内呈现出较高的峰值因子,导致功率放大器效率降低。针对相移键控(PSK)和正交幅度调制(QAM)的OFDM信号,研究了以信号峰值因子、导数和相干时间变化量为内容的包络特性,从基于过电平理论的互补累积概率函数(CCDF)入手推导了更紧的峰值因子界限。最后通过仿真进行了分析。
关键词(KeyWords)： 正交频分复用(OFDM);包络特性;互补累积概率函数(CCDF);峰值因子
基金项目(Foundation):
作者(Author): 张琛,陈洪,张尔扬
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