Performance of Cooperative Spatial Modulation with AF Protocol in Wireless Relay Network  

作　　者：YU Xiangbin PAN Qing WANG Cheng 

机构地区：[1]College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics [2]National Mobile Communications Research Laboratory,Southeast University

出　　处：《Chinese Journal of Electronics》2019年第1期143-151,共9页电子学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61571225);Natural Science Foundation of Jiangsu Province(No.BK20181289);Open Research Fund of National Mobile Communications Research Laboratory(No.2017D03);Six Talent Peaks Project of Jiangsu(No.DZXX-007);the Fundamental Research Funds for the Central Universities(No.NS2014038)

摘　　要：By combing Spatial modulation(SM) with the Amplify-and-forward(AF) cooperative communication, a cooperative SM scheme with AF(AF-SM) protocol is presented, and the corresponding Bit error rate(BER)performance is investigated. Based on the performance analysis, the error probability of antenna index estimation(Pa) and the error probability of symbol estimation(Pd),which constitutes the overall average BER, are derived,respectively. As a result, tightly approximate closedform expressions of Paand Pdare attained, respectively.Using these expressions, the closed-form overall average BER is achieved. During the analysis, the computational complexity of AF-SM detector is also provided in terms of the complex addition and multiplication numbers.Besides, the asymptotic BER at high SNR and the corresponding diversity gain are further derived, and the resultant diversity gain of Nr+ 1 is obtained for the system with Nrreceive antennas. Simulation results show that our theoretical analysis is valid, and provides good performance evaluation method for cooperative SM system. Moreover, the BER performance can be effectively improved as Nrincreases due to higher diversity gain.By combing Spatial modulation(SM) with the Amplify-and-forward(AF) cooperative communication, a cooperative SM scheme with AF(AF-SM) protocol is presented, and the corresponding Bit error rate(BER)performance is investigated. Based on the performance analysis, the error probability of antenna index estimation(P_a) and the error probability of symbol estimation(P_d),which constitutes the overall average BER, are derived,respectively. As a result, tightly approximate closedform expressions of P_a and P_d are attained, respectively.Using these expressions, the closed-form overall average BER is achieved. During the analysis, the computational complexity of AF-SM detector is also provided in terms of the complex addition and multiplication numbers.Besides, the asymptotic BER at high SNR and the corresponding diversity gain are further derived, and the resultant diversity gain of N_r+ 1 is obtained for the system with N_r receive antennas. Simulation results show that our theoretical analysis is valid, and provides good performance evaluation method for cooperative SM system. Moreover, the BER performance can be effectively improved as N+r increases due to higher diversity gain.

关 键 词：Spatial modulation (SM) COOPERATIVE communication Amplify and FORWARD PROTOCOL Diversity gain AVERAGE BIT error rate 

分 类 号：TN[电子电信]