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Multi-source multi-destination relay network: Constrained optimization for higher diversity

Lookup NU author(s): Dr Shouhong Zhu, Dr Zhiguo Ding

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Abstract

The authors consider a cooperative communication system where multiple sources transmit data to multiple destinations, being helped by multiple half-duplex relay nodes: relay nodes perform `amplify and forward` as their cooperative technique, with the use of complex weights for forwarding; complex forwarding weights are optimised, based on the obtained channel information, to improve data transmission performance, especially its corresponding diversity order. In particular, the authors investigate the constrained optimisation on the forwarding weights, under the two constraints of interference-free data reception at all destinations and total forwarding power at all relays, to (i) maximise the signal-to-noise ratio (SNR) of any given source`destination pair; (ii) optimise (here maximise the minimum among) the SNRs of all source`destination pairs. Performance (especially diversity order) analysis and Monte-Carlo simulations show the achieved diversity order and the consistence between analytical and numerical results.

Publication metadata

Author(s): Ding Z; Zhu S

Publication type: Article

Publication status: Published

Journal: IET Communications

Year: 2010

Volume: 4

Issue: 12

Pages: 1484-1494

Print publication date: 26/07/2010

ISSN (print): 1751-8628

ISSN (electronic): 1751-8636

Publisher: Institution of Engineering and Technology

URL: http://dx.doi.org/10.1049/iet-com.2009.0529

DOI: 10.1049/iet-com.2009.0529

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