分数阶傅里叶变换对OFDM系统峰均比的影响  

Influence of fractional Fourier transform to PAPR of OFDM system

作　　者：王永学[1] 

机构地区：[1]深圳职业技术学院电信学院通信系,广东深圳518055

出　　处：《计算机工程与应用》2010年第13期127-128,167,共3页Computer Engineering and Applications

基　　金：深圳市科技局支持项目(No.07KJcb137)

摘　　要：分析并讨论了分数阶傅里叶变换对OFDM系统峰均功率比性能的影响,并与传统的采用离散傅里叶变换的OFDM系统的峰均功率比性能进行了比较。结果表明在子载波数较少的情况下,采用分数阶傅里叶变换的OFDM系统的峰均功率比性能要优于采用离散傅里叶变换的OFDM系统的峰均功率比性能,而随着系统子载波数量的逐渐增加,二者性能趋向一致。The influence of Fractional Fourier Transform（FRFT） to the Peak-to-Average Power Ratio（PAPR） performance of the OFDM system is analyzed and compared with the PAPR performance of the OFDM system based on normal Discrete Fourier Transform（DFT）.Simulation results show that the PAPR performance of FRFT-based OFDM system is better than that of DFTbased OFDM system when the number of sub-carrier is not very large.As the number of sub-carrier increases,PAPR performance of both systems becomes to nearly the same.

关 键 词：峰均功率比 分数阶傅里叶变换 离散傅里叶变换 正交频分复用 

分 类 号：TN919.5[电子电信—通信与信息系统]