一种基于分数阶傅立叶变换的时变信道参数估计方法  

A Method for Time-Varying Channel Parameter Estimation Based on Fractional Fourier Transform

作　　者：陈恩庆[1] 陶然[1] 张卫强[1] 

机构地区：[1]北京理工大学电子工程系,北京100081

出　　处：《电子学报》2005年第12期2101-2104,共4页Acta Electronica Sinica

基　　金：国家部委基金项目(No.6140445);高等学校优秀青年教师教学科研奖励计划项目

摘　　要：时变衰落信道环境对准确的信道估计提出了巨大挑战.本文提出了一种基于分数阶傅立叶变换的时变信道参数估计方法.该方法根据信道参数模型,通过发射多分量线性调频信号探测信道,在接收端应用分数阶傅立叶变换对接收信号进行参数估计,从而获得时变信道参数.分析和数值仿真结果表明,这一方法具有较高的估计精度,并且计算简单.Time-varying fading channel greatly challenges the accurate channel estimation. This paper proposes a method for time-varying ehannel parameter estimation based on fractional Fourier transform. According to the channel parametric model, a multi- component LFM signal is sent to detect the channel. At the receiver, fractional Fourier transform is implemented to estimate the parameters of LFM signal and finally obtain the parameters of time-varying channel. Theoretical analysis and simulation results show that the proposed algorithm exhibits good performances and has a low computational complexity.

关 键 词：线性调频信号 信道参数估计 分数阶傅立叶变换 

分 类 号：TN911.23[电子电信—通信与信息系统]