Equalization and semi-blind channel estimation for space-time block coded signals over a frequency-selective fading channel

被引：33
|
作者：
Choi, JH [1 ]
机构：
[1] Univ New S Wales, Sch Elect Engn & Telecommun, Sydney, NSW 2052, Australia
来源：
IEEE TRANSACTIONS ON SIGNAL PROCESSING | 2004年 / 52卷 / 03期
关键词：
blind channel identification; cyclostationary; equalization; frequency-selective fading; MIMO channels; semiblind method; space-time block codes; subspace method;
D O I：
10.1109/TSP.2003.822361
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we investigate the equalization and channel identification for space-time block coded signals over a frequency-selective multiple-input multiple-output (MIMO) channel. The equalization has been considered by taking into account the cyclostationarity of space-time block coded signals. The minimum mean square error (MMSE) solutions have been derived for the linear and decision feedback (DF) equalizers. The channel estimation is required for the equalization. With known symbols (as pilot symbols), MIMO channels can be estimated. In addition, due to the redundancy induced by space-time block code, it is possible to identify MIMO channels blindly using the subspace method. We consider both blind and semi-blind channel estimation for MIMO channels. It is shown that the semi-blind channel estimate has fewer estimation errors, and it results in less (bit error rate) performance degradation of the MMSE linear and DF equalizers.
引用
收藏
页码：774 / 785
页数：12
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