"Convolutional Network-Coded Cooperation in Multi-Source Networks With a Multi-Antenna Relay"

AuthorsA. Karbalayghareh, M. Nasiri-Kenari and M. Hejazi
JournalIEEE Transactions on Wireless Communications
Page number4323-4333
Serial number8
Volume number13
Paper TypeFull Paper
Published AtAug. 2014
Journal GradeISI
Journal TypeTypographic
Journal CountryUnited States

Abstract

We propose a novel cooperative transmission scheme called Convolutional Network-Coded Cooperation (CNCC) for a network including N sources, one M-antenna relay, and one common destination. The source-relay (S-R) channels are assumed to be Nakagami-m fading, while the source-destination (S-D) and the relay-destination (R-D) channels are considered Rayleigh fading. The CNCC scheme exploits the generator matrix of a good (N + M', N,v) systematic convolutional code, with the free distance of dfree designed over GF(2), as the network coding matrix which is run by the network's nodes, such that the systematic symbols are directly transmitted from the sources, and the parity symbols are sent by the best antenna of the relay. An upper bound on the BER of the sources, and consequently, the achieved diversity orders are obtained. The numerical results indicate that the CNCC scheme outperforms the other cooperative schemes considered, in terms of the diversity order and the network throughput. The simulation results confirm the accuracy of the theoretical analysis.

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