A simple channel estimator for space-time coded OFDM systems in rapid fading channels

被引：0
|
作者：
单淑伟
罗汉文
宋文涛
机构：
[1] Shanghai Jiaotong University
[2] Shanghai Jiaotong University Shanghai 200030
[3] Department of Electronic Engineering
[4] China
来源：
Journal of Zhejiang University-Science A(Applied Physics & Engineering) | 2004年 / 01期
关键词：
Space time coding; OFDM; Channel estimation; EM algorithm; Doppler channel;
D O I：
暂无
中图分类号：
TN929.5 [移动通信];
学科分类号：
080402 ; 080904 ; 0810 ; 081001 ;
摘要：
A simple channel estimator for space\|time coded orthogonal frequency division multiplexing (OFDM) systems in rapid fading channels is proposed. The channels at the training bauds are estimated using the EM (expectation maximization) algorithm, while the channels at the data bauds are estimated based on the method for modelling the time varying channel as the linear combination of several time\|invariant "Doppler channels". Computer simulations showed that this estimator outperforms the decision directed tracking in rapid fading channels and that the performance of this method can be improved by iteration.
引用
收藏
页码：46 / 50
页数：5
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