We present a new method for calculating the probability of error per symbol (Symbol Error Probability, SEP) of M-ary Quadrature Amplitude Modulation (MQAM) over a slow, flat, identically independently distributed Rician fading channels. Since fading is one of the major constraints in wireless communications, the diversity modulation technique is used for the efficient transfer of message signals. | Yugoslav Journal of Operations Research 25 (2015), Number 1, 93-105 DOI: DISPLAY PROBABILITY OF SYMBOL ERRORS FOR MQAM ON RICIAN FADING CHANNEL BASED ON MGF METHOD Predrag JOVANOVIC Institute for Telecommunications and Electronics, IRITEL . BELGRADE, Batajnički put 23, 11080 pesccia@ Dragan MITIC Institute for Telecommunications and Electronics, IRITEL . BELGRADE, Batajnički put 23, 11080 mita@ Aleksandar LEBL Institute for Telecommunications and Electronics, IRITEL . BELGRADE, Batajnički put 23, 11080 lebl@ Radoslav RAJKOVIC University of Belgrade, Faculty of Mechanical Engineering, Innovation center, QueenMary 16, 11000 Belgrade, Serbia, Received: January 2013 / Accepted: November 2013 Abstract: We present a new method for calculating the probability of error per symbol (Symbol Error Probability, SEP) of M-ary Quadrature Amplitude Modulation (MQAM) over a slow, flat, identically independently distributed Rician fading channels. Since fading is one of the major constraints in wireless communications, the diversity modulation technique is used for the efficient transfer of message signals. Exact analysis of error probability per symbol for MQAM, transmitted over Rician fading channels, is performed by N branches of diversity reception using maximum ratio of signal-to-noise power (maximal-ratio-combining, MRC), where the information in the channel on the 94 P. Jovanovic, et al. / Display Probability of Symbol Errors for MQAM receiver side is known. We also analyzed the performances of MQAM over Rician fading channels are here also analyzed. Approximate formula is used to represent SEP for MQAM transmitted over Gaussian channels. Boundary condition for the approximation is M≥4 and 0≤SNR≤30 dB. Keywords: MQAM (M-ary Quadrature Amplitude Modulation), MRC (Maximal Ratio Combining), MGF (Moment Generating Function), SEP (Symbol Error Probability). MSC: 65EO5, 65D15, .
