Threshold-Based Relay Selection for Detect-and-Forward Relaying in Cooperative Wireless Networks
Article 2010 en
Authors
FO
Füruzan Atay Onat
YF
Yijia Fan
HY
Halim Yanıkömeroğlu
Abstract
1 min read
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 ( ) under the proposed threshold, where 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.
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