OFDM系统减小PAPR的方法  

A Method to Reduce the PAPR of OFDM System

作　　者：鲁昌华[1] 李艳红[1] 冯晓星[1] 

机构地区：[1]合肥工业大学计算机与信息学院

出　　处：《电子测量与仪器学报》2006年第6期81-84,共4页Journal of Electronic Measurement and Instrumentation

摘　　要：OFDM(Orthogonal Frequency Division Multiplexing),中文含义为正交频分复用,它是一种多载波调制技术。由于具有良好的抗多径性能,适用于高速的数据传输,OFDM成为近年来人们研究的热点。但是,由于它存在峰平功率比(PAPR)较高的问题,限制了它在实际系统中的应用。本文从概率问题出发,提出了序列预处理的方法,它不在于降低信号幅度的最大值,而是降低信息序列中峰值出现的概率。经过仿真证明序列预处理的方法有良好的效果。Orthogonal frequency-division multiplexing （OFDM） is an attractive transmission technique for high-bit-rate communication systems. Because OFDM can transport information in high speed through multi-channel,it has become the hotspot these years. One major drawback of OFDM is the high peak-to-average power ratio （PAPR） of the transmitter＇s output signal. Because of the high PAPR, the application of OFDM is limited. Based on the probability, the paper presented proposed technique, which does not reduce the high peak of signal, but reduce the probability of high peak appearing. The proposed technique is effective and flexible through MATLAB simulition.

关 键 词：正交频分复用 部分发射序列 峰平功率比 选择性映射 

分 类 号：TN914.3[电子电信—通信与信息系统]