Computer Science – Information Theory
Scientific paper
2010-05-31
Computer Science
Information Theory
30 pages, 6 figures, submitted to IEEE Transactions on Signal Processing on Nov.20, 2009
Scientific paper
In this paper, joint design of linear relay precoder and destination equalizer for dual-hop non-regenerative amplify-and-forward (AF) MIMO-OFDM systems under channel estimation errors is investigated. Second order moments of channel estimation errors in the two hops are first deduced. Then based on the Bayesian framework, joint design of linear robust precoder at the relay and equalizer at the destination is proposed to minimize the total mean-square-error (MSE) of the output signal at the destination. The optimal designs for both correlated and uncorrelated channel estimation errors are considered. The relationship with existing algorithms is also disclosed. Simulation results show that the proposed robust designs outperform the design based on estimated channel state information only.
Ma Shaodan
Ng Tung-Sang
Wu Yik-Chung
Xing Chengwen
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