抑制多载波系统PAPR的CFR算法比较  

Comparison of CFR Algorithms of PAPR Reduction in Multi-carrier System

作　　者：张巧文[1] 

机构地区：[1]浙江万里学院,浙江宁波315100

出　　处：《浙江万里学院学报》2013年第2期89-94,共6页Journal of Zhejiang Wanli University

基　　金：浙江省教育厅科研项目(编号:Y201018538)

摘　　要：峰均比是多载波调制系统中一个普遍存在的问题,文章阐述了多载波系统中高峰均比问题的来源、峰均比的特性以及大峰均比对系统性能的影响,分析了限幅类技术中的峰值加窗、噪声成形两种波峰因子减少算法,在给出OFDM系统模型的基础上,用MATLAB语言仿真了两种算法的性能,仿真结果表明在降低峰均比上噪声成形算法优于峰值加窗算法。Peak-to-average power ratio （PAPR） is a fundamental issue in multi-carrier modulation. The paper analyzes the origin of high PAPR in multi-carrier communications,the characteristics of PAPR,and the effect of high PAPR on the performance of multi-carrier systems. Moreover,two Clipping based techniques-Peak Windowing and Noise Shaping methods are implemented to reduce the problems of having high crest factor. Finally based on given system model OFDM system,Matlab is used to simulate the performance of two crest factor reduction algorithms. Simulation results show that noise shaping is better than peak windowing in the PAPR reduction.

关 键 词：多载波 正交频分复用 峰均比 波峰因子减小 

分 类 号：TN92[电子电信—通信与信息系统]