Average BER Analysis of NOMA Systems under TWDP fading

This paper presents the average bit-error rate (BER) analysis of downlink non-orthogonal multiple access (NOMA) systems for binary phase-shift keying (BPSK) modulated data. The fading environment is considered to follow the two-wave with diffuse power (TWDP) distribution. The average BER expressions are analyzed for two-user and three-user NOMA systems using the moment generating function (MGF)-based method. Data detection at the users is done using the successive interference cancellation (SIC) method. The deduced analytical expressions are used to show the effects of variation in fading parameter values on the systems’ performance. The simulation results are shown that validate the analytical outcome.