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Transceiver Optimization for MIMO Multi-Relay Systems Using Projected Gradient Approach

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2014
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Conference Paper

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Toding, A. and Khandaker, M. and Rong, Y. 2014. Transceiver Optimization for MIMO Multi-Relay Systems Using Projected Gradient Approach, in S. Hanly (ed), The International Symposium on Information Theory and Its Applications, Oct 26-29 2014, pp. 635-639. Melbourne, Australia: IEEE.
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Proceedings of the International Symposium on Information Theory and Its Applications
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Department of Electrical and Computer Engineering
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Abstract

In this paper, we develop the optimal source precoding matrix and relay amplifying matrices for non-regenerative multiple-input multiple-output (MIMO) relay communication systems with parallel relay nodes using the projected gradient (PG) approach. We show that the optimal relay amplifyingmatrices have a beamforming structure. Exploiting the structure of relay matrices, an iterative joint source and relay matrices optimization algorithm is developed to minimize the mean-squared error (MSE) of the signal waveform estimation at the destination using the PG approach. The performance of the proposed algorithm is demonstrated through numerical simulations.