Physical layer network coding for the K-user multiple access relay channel

Muralidharan, Vijayvaradharaj T. ; Sundar Rajan, B. (2013) Physical layer network coding for the K-user multiple access relay channel In: 2013 IEEE Wireless Communications and Networking Conference (WCNC), 7-10 Apr 2013, Shanghai, China.

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Official URL: http://ieeexplore.ieee.org/document/6554618/

Related URL: http://dx.doi.org/10.1109/WCNC.2013.6554618

Abstract

A Physical layer Network Coding (PNC) scheme is proposed for the K-user wireless Multiple Access Relay Channel (MARC), in which K source nodes transmit their messages to the destination node D with the help of a relay node R. The proposed PNC scheme involves two transmission phases: (i) Phase 1 during which the source nodes transmit, the relay node and the destination node receive and (ii) Phase 2 during which the source nodes and the relay node transmit, and the destination node receives. 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. Wireless networks in which the relay node decodes, suffer from loss of diversity order if the decoder at the destination is not chosen properly. A novel decoder is proposed for the PNC scheme, which offers the maximum possible diversity order of 2, for a proper choice of certain parameters and the network coding map. Specifically, the network coding map used at the relay is chosen to be a K-dimensional Latin Hypercube, in order to ensure the maximum diversity order of 2. Also, it is shown that the proposed decoder can be implemented by a fast decoding algorithm. Simulation results presented for the 3-user MARC show that the proposed scheme offers a large gain over the existing scheme for the K-user MARC.

Item Type:Conference or Workshop Item (Paper)
Source:Copyright of this article belongs to Institute of Electrical and Electronics Engineers.
ID Code:110151
Deposited On:08 Dec 2017 10:19
Last Modified:08 Dec 2017 10:19

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