Average outage rate and average outage duration of adaptive selection DF relaying in cooperative networks
Zhengwei Ni, Xiaoyi Liu, Xin Zhang, Dacheng Yang · 2013
Performance metrics such as outage probability, average error rate and capacity have been studied in cooperative diversity systems by a large number of papers. However, the second-order statistics properties in cooperative diversity systems have not been completely investigated. In this letter, we investigate the second-order statistics properties of an adaptive selection decode-and-forward relaying (SR) cooperative diversity system. We focus on two performance metrics: average outage rate (AOR) and average outage duration (AOD). The accurate closed-form approximations for the AOR and AOD performances are derived using Gauss-Legendre quadrature. The accuracy of our approximations is validated by the Monte-Carlo simulations. Furthermore, we compare conventional SR protocol and adaptive SR protocol in AOR and AOD. It is shown that adaptive SR protocol has a better performance in AOR but two protocols have similar performance in AOD.