降低OFDM信号峰均比的多级迭代限幅方法  

Multi-level Iteration Clipping Method for PAPR Reduction in OFDM System

作　　者：鲁璐[1] 郭道省[1] 杨龙[1] 

机构地区：[1]解放军理工大学通信工程学院,南京210007

出　　处：《无线通信技术》2013年第3期10-14,共5页Wireless Communication Technology

摘　　要：文章在利用直接限幅方法降低OFDM系统峰均功率比(PAPR)的前提下,提出了一种基于查表法的多级迭代限幅方法,该方法针对直接限幅法误码率与限幅比相互制约的情况,对信号采用多级限幅的方法,每次限幅之后记入对应查找表,接收信号以该子载波对应标号作为地址索引,根据查找表信息恢复原信号。仿真结果表明,采用多级迭代限幅的方法可以有效降低系统PAPR,同时,迭代限幅方法相对直接限幅在误码率性能上有很大的提升。Under the condition of direct clipping method for reducing peak to average power ratio （PAPR） of the OFDM system, a novel method of multi -level iterative clipping based on look -up table is proposed. This method aimed at the case of the mutual restraint of bit error rate and direct limiting ratio, using the multi - stage limiter. Signals passed through each clipping limiter part then be written into the corresponding lookup table. The corresponding reference numerals of sub - carrier in received signals are used as the address index for recovering original signal. The simulation results show that the multi - level iteration clipping method can effectively reduce system PAPR and improve the performance of the bit error rate.

关 键 词：PAPR 限幅法 多级迭代 

分 类 号：TN929.5[电子电信—通信与信息系统]