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Robust channel estimation algorithm for dual-hop MIMO relay channels

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Open access
Authors
Chiong, C.
Rong, Yue
Xiang, Y.
Date
2012
Type
Conference Paper

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Chiong, Choo W. R. and Rong, Yue and Xiang, Yong. 2012. Robust channel estimation algorithm for dual-hop MIMO relay channels, in Jamalipour, Abbas (ed), The 23rd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, (PIMRC) Sep 9-12 2012, pp. 2347-2352. Sydney, Australia: IEEE.
Source Title
Proceedings of the 23rd IEEE International Symposium on Personal, Indoor and Mobile Communications
Source Conference
The 23rd IEEE International Symposium on Personal, Indoor and Mobile Communications
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Abstract

In conventional two-phase channel estimation algorithms for dual-hop multiple-input multiple-output (MIMO) relay systems, the relay-destination channel estimated in the first phase is used for the source-relay channel estimation in the second phase. For these algorithms, the mismatch between the estimated and the true relay-destination channel affects the accuracy of the source-relay channel estimation. In this paper, we investigate the impact of such channel state information (CSI) mismatch on the performance of the two-phase channel estimation algorithm. By explicitly taking into account the CSI mismatch, we develop a robust algorithm to estimate the source-relay channel. Numerical examples demonstrate the improved performance of the proposed algorithm.