Performance of M-QAM, M-DPSK and M-PSK with MRC diversity in a Nakagami-m fading channel  

作　　者：Alam S.M.Shamsul Alam Choi GoangSeog 

机构地区：[1]Department of Information and Communication Engineering,Chosun University

出　　处：《Journal of Central South University》2014年第4期1347-1352,共6页中南大学学报（英文版）

基　　金：Project supported by Research Fund Chosun University 2014,Korea

摘　　要：The nature of a wireless communication channel is very unpredictable. To design a good communication link, it is required to know the statistical model of the channel accurately. The average symbol error probability(ASER) was analyzed for different modulation schemes. A unified analytical framework was presented to obtain closed-form solutions for calculating the ASER of M-ary differential phase-shift keying(M-DPSK), coherent M-ary phase-shift keying(M-PSK), and quadrature amplitude modulation(QAM) over single or multiple Nakagami-m fading channels. Moreover, the ASER was estimated and evaluated by using the maximal ratio-combining(MRC) diversity technique. Simulation results show that an error rate of the fading channel typically depends on Nakagami parameters(m), space diversity(N), and symbol rate(M). A comparison between M-PSK, M-DPSK, and M-QAM modulation schemes was shown, and the results prove that M-ary QAM(M-QAM) demonstrates better performance compared to M-DPSK and M-PSK under all fading and non-fading conditions.The nature of a wireless communication channel is very unpredictable. To design a good communication link, it is required to know the statistical model of the channel accurately. The average symbol error probability（ASER） was analyzed for different modulation schemes. A unified analytical framework was presented to obtain closed-form solutions for calculating the ASER of M-ary differential phase-shift keying（M-DPSK）, coherent M-ary phase-shift keying（M-PSK）, and quadrature amplitude modulation（QAM） over single or multiple Nakagami-m fading channels. Moreover, the ASER was estimated and evaluated by using the maximal ratio-combining（MRC） diversity technique. Simulation results show that an error rate of the fading channel typically depends on Nakagami parameters（m）, space diversity（N）, and symbol rate（M）. A comparison between M-PSK, M-DPSK, and M-QAM modulation schemes was shown, and the results prove that M-ary QAM（M-QAM） demonstrates better performance compared to M-DPSK and M-PSK under all fading and non-fading conditions.

关 键 词：M-ary differential phase-shift keying（M-DPSK） M-ary phase shift keying（M-PSK） Nakagami-m fading channel probability density function（PDF） symbol error rate（SER） M-ary quadrature amplitude modulation（M-QAM） 

分 类 号：TN92[电子电信—通信与信息系统]