Outage analysis of superposition modulation aided network coded cooperation in the presence of network coding noise

Zhang, Bo, Hu, Jie, Huang, Ying, El-Hajjar, Mohammed and Hanzo, Lajos (2015) Outage analysis of superposition modulation aided network coded cooperation in the presence of network coding noise IEEE Transactions on Vehicular Technology, pp. 1-9. (doi:10.1109/TVT.2014.2322074).


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We consider a network, where multiple sourcedestination pairs communicate with the aid of a half-duplex relay node (RN), which adopts decode-forward (DF) relaying and superposition-modulation (SPM) for combining the signals transmitted by the source nodes (SNs) and then forwards the composite signal to all the destination nodes (DNs). Each DN extracts the signals transmitted by its own SN from the composite signal by subtracting the signals overheard from the unwanted SNs. We derive tight lower-bounds for the outage probability for transmission over Rayleigh fading channels and invoke diversity combining at the DNs, which is validated by simulation for both the symmetric and the asymmetric network configurations. For the high signal-to-noise ratio regime, we derive both an upperbound as well as a lower-bound for the outage performance and analyse the achievable diversity gain. It is revealed that a diversity order of 2 is achieved, regardless of the number of SN-DN pairs in the network. We also highlight the fact that the outage performance is dominated by the quality of the worst overheated link, because it contributes most substantially to the network coding noise. Finally, we use the lower bound for designing a relay selection scheme for the proposed SPM based network coded cooperative communication (SPM-NC-CC) system.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1109/TVT.2014.2322074
ISSNs: 0018-9545 (print)
Keywords: diversity reception, educational institutions, network coding, relays, signal to noise ration, tin
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Organisations: Southampton Wireless Group
ePrint ID: 366677
Date :
Date Event
2 May 2014Accepted/In Press
August 2014e-pub ahead of print
February 2015Published
Date Deposited: 07 Jul 2014 11:46
Last Modified: 19 Jun 2017 16:33
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/366677

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