Abstract
The performance of a dual-hop amplify-and-forward (AF) relay system is studied with the kth worst partial relay selection (PRS) protocol under the joint impact of feedback delay and multiple cochannel interference (CCI) at the relay nodes. In our analysis, the closed-form and asymptotic expressions of the outage probability are derived and the achievable coding gain and diversity gain of the system are accurately revealed. Further, based on the asymptotic analysis we propose a power allocation scheme, which can lead to SNR performance gains of more than 1 dB compared to the equal power allocation scheme. Finally, Monte-Carlo simulation results are presented to verify the validity of our theoretical analysis.
Highlights
Deployment of multiple relays in the wireless communication offers a series of significant performance improvements, including the system’s throughput ability enhancement and the signal coverage advancement
(iii) Based on the asymptotic analysis of the outage probability, we propose a power allocation scheme to improve the system’s performance and the proposed scheme can lead to SNR performance gains of more than 1 dB compared to the equal power allocation scheme
Monte-Carlo simulation results were presented for the validity of theoretical analysis
Summary
Deployment of multiple relays in the wireless communication offers a series of significant performance improvements, including the system’s throughput ability enhancement and the signal coverage advancement. The authors of [5] investigated the performance of PRS scheme affected by CCI with variable gain relaying and derived the probability density function (PDF) of the received SNR and an asymptotic exponential expression. (i) With the kth worst PRS protocol [7], the closed-form expression for outage probability of partial relay selection system with feedback delay and CCI is derived, which provides an efficient means to investigate the International Journal of Distributed Sensor Networks impact of the number and power levels of CCI as well as the correlation coefficient ρ between the actual and the outdated CSI on the outage performance.
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