降低OFDM系统中PAPR的技术分析

Analysis of PAPR Reduction Techniques for OFDM System

正交频分复用(OFDM)具有较高的频谱利用率、良好的抗多径干扰能力,长期以来一直受到广泛的关注。目前,OFDM已经被公认为是下一代移动通信系统的核心技术之一,但其较高的峰值平均功率比(PAPR)却一直是制约OFDM技术发展的问题之一。如何降低OFDM系统的PAPR是目前通信领域的研究热点之一,本文对目前常用的降低PAPR方法进行了综合分析和比较,并讨论了各方法的优缺点。

Due to a high ratio of frequency and good capability of repelling multipath disturbances, Orthogonal Frequency Divi- sion Multiplexing （OFDM） has always attracted much attention. Now OFDM is regarded as one of the key techniques of the next wireless communication systems. However, the high Peak-to-Average Power Ratio （PAPR） is always one of the main prob- lems of OFDM development. Therefore, how to reduce the PAPR of OFDM signals is one research focus of communication. This paper has a comprehensive analysis and compare of the important methods to reduce PAPR ,and discusses their advantages and shortages..