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Optimal Joint Source and Relay Beamforming for Parallel MIMO Relay Networks

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Open access
Authors
Toding, Apriana
Khandaker, Muhammad
Rong, Yue
Date
2010
Type
Conference Paper

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Toding, Apriana and Khandaker, Muhammad R.A. and Rong, Yue. 2010. Optimal Joint Source and Relay Beamforming for Parallel MIMO Relay Networks, in Cuthbert, L. (ed), The 6th International Conference on Wireless Communications, Networking and Mobile Computing, Sep 23 2010. Chengdu, China: IEEE.
Source Title
Proceedings of the 6th International Conference on Wireless Communications, Networking and Mobile Computing
Source Conference
The 6th International Conference on Wireless Communications, Networking and Mobile Computing
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Department of Electrical and Computer Engineering
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Abstract

In this paper, we study the optimal structure of the source precoding matrix and the relay amplifying matrices for multiple-input multiple-output (MIMO) relay communication systems with parallel relay nodes. We show that both the optimal source precoding matrix and the optimal relay amplifyingmatrices have a beamforming structure. Using the optimal structure, a joint source and relay power loading algorithm is developed to minimize the mean-squared error (MSE) of the signal waveform estimation. Compared with existing algorithms for parallel MIMO relay networks, the proposed joint source and relay beamforming algorithm has a significant improvement in the system bit-error-rate performance.