OFDM系统频率和时间估计的循环平稳实现  

A Cyclonstationary Approach for Joint Estimation of Frequency and Time in OFDM System

作　　者：崔小准[1] 陈豪 胡光锐[1] 

机构地区：[1]上海交通大学,上海200030 [2]西安空间无线电技术所,西安710000

出　　处：《通信技术》2003年第3期44-45,共2页Communications Technology

基　　金：国家自然科学基金资助项目(60172018)

摘　　要：提出了一个用于频率选择性衰落信道中传输的正交频分多路(OFDM)的定时和频率联合估计的算法。这种估计器利用了接收信号的二阶循环特性,而且不需要信道冲激响应的信息。计算机仿真表明,采用所提出的方案能显著地提高估计器的性能。In this paper,a blind estimation alg orithm is developed for estimating j ointly timing and frequency offset o f Orthogonal frequency division multiplexing(OFDM)signals transmitted through a frequ ency -selective fading channel.The pro-posed estimator exploits the second-order cyclostationarity of receiv ed signals and does not require the in formation of impulse response of channel.The results show a significant performance improvement when using the scheme presented in this paper through computer simulation.

关 键 词：循环平稳特性 正交频分多路 频率估计 定时估计 

分 类 号：TM93[电气工程—电力电子与电力传动]