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On the design of a novel joint network-channel coding scheme for the multiple access relay channel

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3 Author(s)
Hernaez, M. ; Centro De Estudios e Investig. Tec. de Gipuzkoa (CEIT), TECNUN Univ. of Navarra, Donostia-San Sebastián, Spain ; Crespo, P.M. ; Del Ser, J.

This paper proposes a novel joint non-binary network-channel code for the Time-Division Decode-and-Forward Multiple Access Relay Channel (TD-DF-MARC), where the relay linearly combines - over a non-binary finite field - the coded sequences from the source nodes. A method based on an EXIT chart analysis is derived for selecting the best coefficients of the linear combination. Moreover, it is shown that for different setups of the system, different coefficients should be chosen in order to improve the performance. This conclusion contrasts with previous works where a random selection was considered. Monte Carlo simulations show that the proposed scheme outperforms, in terms of its gap to the outage probabilities, the previously published joint network-channel coding approaches. Besides, this gain is achieved by using very short-length codewords, which makes the scheme particularly attractive for low-latency applications.

Published in:

Selected Areas in Communications, IEEE Journal on  (Volume:31 ,  Issue: 8 )

Date of Publication:

August 2013

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