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.
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)
关键词
循环平稳特性
正交频分多路
频率估计
定时估计
cyclostationarity,orthogonal frequency division mult iplexing,estimation of frequeng,e stimeation of time
