A link selection strategy for cooperative ad-hoc networks

作者：Annadurai Chinnamuthu^*; Nagarajan Velmurugan

来源：Computers & Electrical Engineering, 2015, 48: 109-118.

DOI：10.1016/j.compeleceng.2015.01.006

• Ad-hoc networks
• BPSK signaling
• Cooperative diversity
• Decode and forward technique
• Selection combining
• Symbol error probability

Cooperative ad-hoc networks are popular because of their ability to provide reliable communication. In this paper, we consider a cooperative ad-hoc network consisting of a source, two decode-and-forward relays and a destination. The source intends to transmit its data to the destination directly as well as through relays. We employ a weighted selection combining at the destination which chooses either the weighted source-to-relay-1-torelay2-to-destination link or source-to-destination link depending upon the instantaneous signal-to-noise-ratio. We derive the end-to-end symbol error probability (SEP) of a triplehop cooperative network with binary phase-shift keying for a flat, slow Rayleigh fading channel. Further, we develop an algorithm which investigates the performance of this cooperative ad-hoc network in terms of SEP. Results show that the cooperation among the nodes and weighted selection combining improves the performance of ad-hoc networks when compared to a point-to-point link and conventional selection combining.

• 出版日期2015-11