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access icon free Joint maximum likelihood detection and link selection for cooperative MIMO relay systems

© The Institution of Engineering and Technology
Received 06/11/2013, Accepted 06/05/2014, Revised 28/04/2014, Published 22/07/2014

In this study, the authors propose a cross layer design strategy that consists of a cooperative maximum likelihood detector operating in conjunction with link selection for cooperative multiple-input multiple-output relay networks. The system considered is a two phase relaying model, with amplify-and forward relays. The model considers the effect of relay placement and of large scale shadowing. The authors develop a cooperative maximum likelihood detector for an arbitrary number of relays, and link selection schemes are devised for two scenarios relating to the available knowledge at the destination node, which considers relay combination, with complexity analysis. The authors also propose a cooperative list sphere decoder that processes soft information and implements an iterative detection and decoding scheme. The results of simulations of the systems are presented, with comparisons to system models used in previous literature, and show how the cooperative detector and the proposed link selection schemes affect the bit error rate performance at the destination node, for both the hard decision non-iterative case, and the soft information iterative processing case.

Inspec keywords: maximum likelihood detection; iterative decoding; radio links; amplify and forward communication; cooperative communication; relay networks (telecommunication); MIMO communication

Other keywords: iterative decoding scheme; cooperative MIMO relay systems; cross layer design strategy; bit error rate performance; amplify-and forward relays; soft information iterative processing case; maximum likelihood detection; link selection schemes; iterative detection; cooperative multiple-input multiple-output relay networks; cooperative list sphere decoder; two phase relaying model; relay placement

Subjects: Codes; Radio links and equipment; Other topics in statistics

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