一种降低OFDM系统峰均比的新方案

A New Scheme for Reducing the Peak to Average Power Ratio in OFDM System

提出了一种降低OFDM系统峰均比(PAPR)的实现方案,该方案利用编码和选择性映射(SLM)方法相结合来降低OFDM系统的PAPR,可以认为是一种改进的SLM算法。给出了具体的编解码方案、边信息的传输方案,他通过将边信息嵌入到传输数据中,随数据码元一起发送,不会造成系统频谱利用率的下降。最后,对PAPR和误码率(BER)性能进行了仿真研究,结果表明改进SLM算法可以有效降低OFDM系统的PAPR,同时在瑞利衰落信道下可以降低系统的误码率。

In this paper, we propose a kind of scheme, which combines code with SLM method is put forward to reduce OFDM PAPR. It may be regarded as an improved version of the Selective Mapping（SLM）. The detailed encode and decode scheme,side information transmission scheme are discussed in the paper. The proposed scheme can＇t induce the loss of spectrum efficiency by embedding side information within the transmitted data. Finally, we present the simulation research for PAPR and BER performance,the simulation results of which indicate that the improved SLM algorithm can efficiently reduce the PAPR and the BER of the Rayleigh fading channel in the OFDM system.