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Channel estimation for two-way MIMO relay systems in frequency-selective fading environments

Version 2 2024-06-03, 11:47
Version 1 2015-02-04, 09:48
journal contribution
posted on 2024-06-03, 11:47 authored by CWR Chiong, Y Rong, Yong XiangYong Xiang
© 2002-2012 IEEE. In this paper, we investigate the channel estimation problem for two-way multiple-input multiple-output (MIMO) relay communication systems in frequency-selective fading environments. We apply the method of superimposed channel training to estimate the individual channel state information (CSI) of the first-hop and second-hop links for two-way MIMO relay systems with frequency-selective fading channels. In this algorithm, a relay training sequence is superimposed on the received signals at the relay node to assist the estimation of the second-hop channel matrices. The optimal structure of the source and relay training sequences is derived to minimize the mean-squared error (MSE) of channel estimation. Moreover, the optimal power allocation between the source and relay training sequences is derived to improve the performance of channel estimation. Numerical examples are shown to demonstrate the performance of the proposed superimposed channel training algorithm for two-way MIMO relay systems in frequency-selective fading environments.

History

Journal

IEEE Transactions on wireless communications

Volume

14

Pagination

399-409

Location

Champaign, III.

ISSN

1536-1276

Language

eng

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Copyright notice

2015, IEEE

Issue

1

Publisher

IEEE