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Denoise-and-forward network coding for two-way relay MIMO systems

Lookup NU author(s): Dr Zhiguo Ding


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In this paper, we propose a denoise-and-forward network coding (DNF-NC) transmission scheme for its applications in two-way relay multiple-input and multiple-output (MIMO) systems. We first consider a scenario with a single pair of source nodes, and minimum mean square error (MMSE) receiver is applied at each node. The global optimal precoding design based on the mean square error (MSE) criterion can be achieved by solving two independent convex optimization problems. To achieve a better tradeoff between performance and complexity, an alternative power optimization approach is proposed using a channel diagonalization technique. Then, we proceed to considering a more challenging bidirectional communication scenario with multiple pairs of source nodes. With intrapair coordination at the sources, we modify DNF-NC by employing a signal alignment technique to combat interpair interference. The numerical results demonstrate that the proposed DNF-NC schemes can significantly improve bit error rate (BER) performance in both two scenarios, and such performance gains can be achieved with relatively low computational complexity. © 2013 IEEE.

Publication metadata

Author(s): Zhao Z, Peng M, Ding Z, Wang W, Chen H-H

Publication type: Article

Publication status: Published

Journal: IEEE Transactions on Vehicular Technology

Year: 2014

Volume: 63

Issue: 2

Pages: 775-788

Print publication date: 01/02/2014

Online publication date: 10/09/2013

Acceptance date: 01/09/2013

ISSN (print): 0018-9545

ISSN (electronic): 1939-9359

Publisher: IEEE


DOI: 10.1109/TVT.2013.2281330


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