Outage Equivalence of Opportunistic Relaying and Selection Cooperation in Presence of Co-Channel Interference

• Published in: IEEE transactions on wireless communications 2015-06, Vol.14 (6), p.2981-2991
• Main Authors: Ju, MinChul, Hwang, Kyu-Sung
• Format: Article
• Language: English
• Subjects: Co-channel interference; decode-and-forward (DF)-based relay network; Interference; Mutual information; opportunistic relaying (OR); outage equivalence; outage probability; Protocols; Relay networks (telecommunications); relay selection; selection cooperation (SC); Signal to noise ratio; Wireless communication
• ISSN: 1536-1276; 1558-2248
• DOI: 10.1109/TWC.2015.2398871

In this paper, we investigate two different relay selection schemes, opportunistic relaying (OR) and selection cooperation (SC), for decode-and-forward (DF)-based relay networks consisting of a source, multiple relays, and a destination in the presence of multiple co-channel interferers, where each terminal has a single antenna and operates in a half-duplex mode. For the network, we first extend the conventional OR and SC to relay networks with the direct-path and multiple co-channel interferers, and obtain the exact and closed-form outage probability of the OR. Then, we show that the SC is equivalent to the OR in terms of outage performance for relay networks with the direct-path and multiple co-channel interferers. Finally, we show that the SC and OR are outage-optimal under the aggregate power consumption constraint at the relays for relay networks with the direct-path and multiple co-channel interferers.