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Physical Layer Network Coding for the K-User Multiple Access Relay Channel

Muralidharan, Vijayvaradharaj T and Rajan, Sundar B (2013) Physical Layer Network Coding for the K-User Multiple Access Relay Channel. In: IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 12 (6). pp. 3107-3119.

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Official URL: http://dx.doi.org/10.1109/TWC.2013.042413.121825


We propose a Physical layer Network Coding (PNC) scheme for the K-user wireless Multiple Access Relay Channel, in which K source nodes want to transmit messages to a destination node D with the help of a relay node R. The proposed scheme involves (i) Phase 1 during which the source nodes alone transmit and (ii) Phase 2 during which the source nodes and the relay node transmit. At the end of Phase 1, the relay node decodes the messages of the source nodes and during Phase 2 transmits a many-to-one function of the decoded messages. To counter the error propagation from the relay node, we propose a novel decoder which takes into account the possibility of error events at R. It is shown that if certain parameters are chosen properly and if the network coding map used at R forms a Latin Hypercube, the proposed decoder offers the maximum diversity order of two. Also, it is shown that for a proper choice of the parameters, the proposed decoder admits fast decoding, with the same decoding complexity order as that of the reference scheme based on Complex Field Network Coding (CFNC). Simulation results indicate that the proposed PNC scheme offers a large gain over the CFNC scheme.

Item Type: Journal Article
Additional Information: Copyrright of this article is belongs to IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Keywords: Diversity gain; Latin Hypercubes; multiple access relay channel; physical layer network coding
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 25 Sep 2013 11:51
Last Modified: 25 Sep 2013 11:51
URI: http://eprints.iisc.ac.in/id/eprint/47316

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