混沌选择性映射降低MC-CDMA系统的峰均功率比

Peak to average power reduction of MC-CDMA using chaotic selected mapping

选择性映射是降低MC-CDMA系统信号峰均功率比(PAPR)的一种有效方法。采用不同相位序列的选择性映射降低PAPR的效果是不同的。提出了将混沌序列作为相位序列来降低MC-CDMA系统的PAPR,研究结果表明混沌序列能有效地降低MC-CDMA系统的PAPR,并且效果优于当前所采用的Golay Comp lem entary,Shap iro-Ru-d in,Random等序列。发现Lyapunov指数越大,混沌序列降低MC-CDMA系统的PAPR效果越好。

Selected Mapping(SLM) is an effective method to reduce Peak-to-Average Power Ratio (PAPR) of MC-CDMA signal. Different phase sequences have different effects on reducing PAPR in SLM. In this paper, chaotic sequence is proposed as phase sequence to reduce PAPR of MC-CDMA .The research results demonstrate that chaotic sequence can effectively reduce PAPR and is superior to other phase sequences used currently, such as Golay Complementary,Shapiro-Rudin,Random, and so on.Also, we find that the chaotic sequences with greater Lyapunov exponent can reduce PAPR more effectively.