Approximate Outage Probability Expressions for Evaluating Cooperative Communications
Cooperative communication systems have emerged as a significant concept to improve reliability and throughput in wireless systems.Some existing cooperative diversity protocol are shown to increase the diversity order,allowing single-antenna nodes to cooperate and achieve performance like a real MIMO system.In this paper,we focus on improving the precision of analysis of Amplify-and-Forward(AF),Decode-and-Forward(DF)in terms of outage probability.Especially,we derive some approximate expressions of outage probability for these three relaying protocols.The approximate expressions are proved to be better than some existing ones,in other words our approximations are much closer to the truth value.In our research,we use the outage probabilities calculated by Monte Carlo Method(MCM)as the reference for the reason that they are the nearest to the truth value.We show analytically and experimentally that our expressions are better than some existing approximate expressions in low Signal to Noise Ratios(SNR)as well.The simulation results and our analysis can prove the accuracy and concision of the expressions.Besides,the approximate expressions are useful to the analysis of outage probability when we investigate the performance of relaying protocols.
Chengkun Sun Takashi Kodama Hua-An Zhao
Department of Computer Science and Electrical Engineering,Kumamoto University,Japan
国际会议
Progress in Electromagnetics Research Symposium 2011(2011年电磁学研究新进展学术研讨会)
苏州
英文
297-301
2011-09-01（万方平台首次上网日期，不代表论文的发表时间）