Threshold-based relay selection for detect-and-forward relaying in cooperative wireless networks

Furuzan Atay Onat, Yijia Fan, Halim Yanikomeroglu, H. Vincent Poor

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


This paper studies two-hop cooperative demodulate-and-forward relaying using multiple relays in wireless networks. A threshold based relay selection scheme is considered, in which the reliable relays are determined by comparing source-relay SNR to a threshold, and one of the reliable relays is selected by the destination based on relay-destination SNR. The exact bit error rate of this scheme is derived, and a simple threshold function is proposed. It is shown that the network achieves full diversity order (N+1) under the proposed threshold, where N is the number of relays in the network. Unlike some other full diversity achieving protocols in the literature, the requirement that the instantaneous/average SNRs of the source-relay links be known at the destination is eliminated using the appropriate SNR threshold.

Original languageEnglish (US)
Article number721492
JournalEurasip Journal on Wireless Communications and Networking
StatePublished - 2010

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Computer Science Applications
  • Computer Networks and Communications


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