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Wireless Networks

, Volume 24, Issue 4, pp 1161–1174 | Cite as

Distributed transmit-antenna selection in variable-gain relaying systems

  • Diana Cristina González
  • Daniel Benevides da Costa
  • José Cândido Silveira Santos Filho
Article
  • 123 Downloads

Abstract

Recently, distributed transmit-antenna selection schemes have attracted great interest, since they capture the essential benefits of multi-antenna systems while reducing their cost, complexity, delay, and feedback overhead. In those distributed schemes, the antenna selection is based on local channel-state information, in contrast to their optimal centralized counterparts, which require knowing the channel state of all links. Herein, we design two such distributed schemes for a dual-hop variable-gain amplify-and-forward relaying system with one multi-antenna source, one single-antenna relay, and one single-antenna destination. The two schemes differ in the diversity method used at the destination, namely, selection combining or maximal-ratio combining, and in the selection rule accordingly. In addition to conceiving these new schemes, we analyze their outage performance. Since an exact analysis proves intractable, we tackle the outage probability in terms of lower-bound expressions and their asymptotes at high signal-to-noise ratio. Importantly, the derived bounds turn out to be almost indistinguishable from the true performance, assessed via simulation. Our results reveal that the proposed distributed schemes achieve the same diversity order of their optimal centralized counterparts and perform closely to these, specially when the relay is near the source or destination.

Keywords

Cooperative diversity Outage probability Relay channel Spectral efficiency Transmit antenna selection 

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Diana Cristina González
    • 1
  • Daniel Benevides da Costa
    • 2
  • José Cândido Silveira Santos Filho
    • 1
  1. 1.Department of Communications School of Electrical and Computer EngineeringUniversity of Campinas (Unicamp)CampinasBrazil
  2. 2.Department of Computer EngineeringFederal University of Ceará (UFC)SobralBrazil

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