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CTH17-2: Energy-efficient cooperative relaying over fading channels with simple relay selection

  • R K Madan
  • N B Mehta
  • Andreas Molisch
  • J Zhang
Publiceringsår: 2006
Språk: Engelska
Publikation/Tidskrift/Serie: IEEE
Dokumenttyp: Konferensbidrag


We consider a cooperative wireless network where the source broadcasts data to relays, some or all of which cooperatively beamform to forward the data to the destination. The network is subject to an overall outage constraint. We generalize the standard approaches for cooperative communications in two respects: (i) we explicitly model and factor in the cost of acquiring

channel state information (CSI), and (ii) we consider more general, yet simple, selection rules for the relays and compute the optimal one among them. These rules include as special cases several relay selection criteria proposed in the literature. We present analytical results for the

homogeneous case, where the links have identical mean channel gains. For this case, we show that the optimal transmission scheme is simple and can be computed efficiently. Numerical results show that while the cost of training and feedback of CSI is significant, relay cooperation is still beneficial.


  • Electrical Engineering, Electronic Engineering, Information Engineering


IEEE Global Telecommunications Conference, 2006
  • Radio Systems-lup-obsolete
  • ISSN: 1930-529X
  • ISBN: 1-4244-0356-1

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