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Performance of M-QAM, M-DPSK and M-PSK with MRC diversity in a Nakagami-m fading channel
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作者 Alam S.M.Shamsul Alam Choi GoangSeog 《Journal of Central South University》 SCIE EI CAS 2014年第4期1347-1352,共6页
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(A... 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. 展开更多
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)
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