OFDM无线通信中高峰均比及其抑制算法研究

The Study of High PAPR and Reduction Algorithm for Wireless Communication Using OFDM Signals

凭借很强的抗符号间干扰(ISI)和抗衰落能力,采用正交频分信道的OFDM技术的无线通信越来越受到人们的重视。但是作为一种多载波调制方式,OFDM技术同样存在着高峰均比(PAPR)的问题,高的PAPR会导致信号畸变,造成子信道间的相互干扰,从而影响OFDM的性能。针对此,重点介绍了OFDM系统中的PAPR比问题的概念,并对降低PAPR的主要算法进行了论述。

With the capability of strong resistance to Inter-Symbol Interference （ISI） and the ability of anti-fading, OFDM, which uses the channel based on orthogonal frequency division, has been paid more attention. However, OFDM technology has the problem of Peak-to-Average Power Ration （PAPR）. High PAPR will lead to signal distortion which may cause interference between sub-channels and affect the performance of OFDM. This paper focuses on the problem of PAPR in the OFDM system firstly, then, the main methods of reduction algorithms of PAPR are discussed.