一种降低OFDM系统PAPR的改进限幅噪声压缩方法  

An Improved Clipping-noise Compression Methodfor Reducing PAPR of OFDM Systems

作　　者：丁亚青 吕建鸿 王中鹏[1] DING Yaqing;LYU Jianhong;WANG Zhongpeng(School of Information and Electronic Engineering,Zhejiang University of Science and Technology,Hangzhou 310023,China)

机构地区：[1]浙江科技学院信息与电子工程学院,杭州310023

出　　处：《电讯技术》2022年第11期1691-1696,共6页Telecommunication Engineering

基　　金：浙江省自然科学基金重点项目(LZ21F010001)。

摘　　要：为降低正交频分复用(Orthogonal Frequency Division Multip-lexing,OFDM)系统峰均功率比(Peak to Average Power Ratio,PAPR),在最近提出的限幅噪声压缩(Clipping-noise Compression,CNC)方法基础上,提出了一种基于改进的艾里压缩函数来抑制限幅噪声的方法(CNC-Improved Airy Function,CNC-IAF)。改进的艾里压缩函数形式简单,计算复杂度较小,并且对归一化限幅噪声的取值条件没有CNC方法的严格。仿真结果表明,CNC-IAF方法能够抑制OFDM信号的PAPR同时有效地降低系统误码率,性能比CNC方法均有改善。In order to reduce the peak to average power ratio(PAPR)of orthogonal frequency division multiplexing(OFDM)signal and according to the recently proposed clipping-noise compression(CNC)method,a clipping-noise compression method based on improved Airy function(CNC-IAF)is proposed.The improved Airy compression function has the advantages of simple form and low computational complexity,and it is not as strict as CNC method on the value condition of normalized clipping noise.Simulation results show that the CNC-IAF method can reduce PAPR and bit error rate of OFDM system while having better performances than the CNC method.

关 键 词：正交频分复用 峰均功率比抑制 限幅噪声压缩 艾里函数 

分 类 号：TN929.5[电子电信—通信与信息系统]