Transceiver Design for Dual-Hop Nonregenerative MIMO-OFDM Relay Systems Under Channel Uncertainties

In this paper, linear transceiver design for dual-hop nonregenerative [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...

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Bibliographic Details
Published in:IEEE transactions on signal processing 2010-12, Vol.58 (12), p.6325-6339
Main Authors: CHENGWEN XING, SHAODAN MA, WU, Yik-Chung, NG, Tung-Sang
Format: Article
Language:English
Subjects:
Amplify-and-forward (AF)
Applied sciences
Channel estimation
Channels
Covariance matrix
Design engineering
Detection, estimation, filtering, equalization, prediction
equalizer
Equalizers
Error analysis
Errors
Exact sciences and technology
forwarding matrix
Hops
Information, signal and communications theory
Mean square error methods
MIMO
minimum mean-square-error (MMSE)
Miscellaneous
Multiplexing
Optimization
Orthogonal Frequency Division Multiplexing
Relay systems
Relays
Signal and communications theory
Signal processing
Signal, noise
Telecommunications and information theory
Time domain analysis
Transceivers
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Summary:In this paper, linear transceiver design for dual-hop nonregenerative [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 forwarding matrix at the relay and equalizer at the destination under channel estimation errors 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. Moreover, this design is extended to the joint design involving source precoder design. Simulation results show that the proposed design outperforms the design based on estimated channel state information only.
ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2010.2070797