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.
出处
《计算机工程与应用》
CSCD
北大核心
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)
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
peak-to-average power ratio
fractional Fourier transform
discrete Fourier transform
Orthogonal Frequency Division Multiplexing（OFDM）
