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ZF DFE transceiver design for MIMO relay systems with direct source-destination link

Millar, Andrew Paul and Weiss, Stephan and Stewart, Robert (2011) ZF DFE transceiver design for MIMO relay systems with direct source-destination link. In: 19th European Signal Processing Conference, 2011-08-29 - 2011-09-02.

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Abstract

In this paper we consider a non-linear transceiver design for non-regenerative multiple-input multiple-output (MIMO) relay networks where a direct link exists between the source and destination. Our system utilises linear processors at the source and relay as well as a zero-forcing (ZF) decision feedback equaliser (DFE) at the receiver. Under the assumption that full channel state information (CSI) is available the precoding and equaliser matrices are designed to minimise the arithmetic mean square error (MSE) whilst meeting transmit power constraints at the source and destination. The source, relay, and destination processors are provided in closed form solution. In the absence of the direct link our design particularises to a previous ZF DFE solution and as such can be viewed as a generalisation of an existing work. We demonstrate the effectiveness of the proposed solution through simulation and show that it outperforms existing techniques in terms of bit error ratio (BER).