On the Outage Performance of Selection Amplify-and-Forward Relaying Scheme

• Published in: IEEE communications letters Vol. 18; no. 3; pp. 423 - 426
• Main Authors: Lee, Jeehoon, Rim, Minjoong, Kim, Kiseon
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.03.2014; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Access methods and protocols, osi model; amplify-and-forward relaying; Antenna arrays; Applied sciences; Cooperative communications; Correlation; Diversity methods; Exact sciences and technology; outage probability; Probability density function; Random variables; Relays; retransmission; Signal to noise ratio; Telecommunications; Telecommunications and information theory; Teleprocessing networks. Isdn; Performance evaluation; Relaying; Relay network; Outage; Wireless telecommunication; Transmission protocol; Cooperative systems; Adaptive method; amplify-and-forward relaying; Cooperative communications; outage probability; Routing protocols; retransmission
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2014.011214.132477

In this letter, we propose a selection amplify-and-forward (AF) relaying scheme which has the lower outage probability than that of a conventional AF relaying scheme in cooperative relay networks. In real wireless environments, as the channel of source-to-destination (SD) link varies with an increase in time, we can also obtain a diversity gain through the SD link by retransmission in common with a conventional AF relaying scheme. Thus, we can expect a performance enhancement by adaptively determining the transmitting node between the relaying and source nodes. We propose a method for adaptively determining between AF relaying and retransmission schemes, and show that the additional diversity gain can be obtained by the proposed scheme.