Outage Performance of Cognitive AF Relay Networks with Imperfect CSI Based on Geometrical Analysis

作     者：LIU Shuai SUN Dechun LIU Zujun YI Kechu YANG Hong WANG Kan 

作者机构：State Key Laboratory of Integrated Services NetworksXidian University China Academy of Space Technology 

出 版 物：《Chinese Journal of Electronics》 (电子学报(英文))

年 卷 期：2017年第26卷第5期

页      面：1048-1056页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：supported by the National Natural Science Foundation of China(No.61301170,No.61571340) the Fundamental Research Funds for the Central Universities(No.JB150109) the 111 Project(No.B08038) 

主　　题：Cognitive relay networks Imperfect Channel state information(CSI) Geometrical analysis 

摘      要：This paper studies the outage performance of a cognitive Amplify-and-forward(AF) relay network subject to Rayleigh *** the condition of imperfect Channel state information(CSI) estimations of the links from the secondary system to the Primary user(PU),the closed-form upper and lower bounds of the outage probability are derived through a geometrical analysis *** asymptotic analysis of the outage probability is also derived in the high Signal-to-noise ratio(SNR)regime to gain additional insights on the *** simulation results corroborate our theoretical analysis,and the effectiveness of the geometrical analysis method is verified with the conventional approach as a *** asymptotic results are very tight with the analytical lower bound in the high SNR *** also can be observed from the simulation results that the impact of the number of relays as well as the imperfect CSI on the outage probability and the diversity order.