ACCURATE BER / SER ANALYSIS AND PERFORMANCE OF DIFFERENT MODULATION SCHEMES OVER WIRELESS FADING CHANNELS

This paper derives accurate analytical expressions for bit-error (BER) and symbol-error (SER) rate of different modulation schemes such as binary phase shift keying (B-PSK), binary frequency shift keying (B-FSK), quadrature phase shift keying (Q-PSK), 8-phase shift keying (8-PSK) and 16- quadrature amplitude modulation (16-QAM) over Nakagami-m fading channels respectively. These analytical expressions are extremely useful for evaluating the system's performance without carrying out time consuming simulations. Subsequently, we verify our derived closed form expressions for Rayleigh fading channels by setting the value of Nakagami fading parameter, m equal to 1. We further validate our derived theoretical results by performing Monte Carlo Simulations of the System Model. The performances of different modulation schemes under Nakagami-m fading channels are analyzed using the average bit / symbol error probability. Furthermore, we also make the performance comparison of modulation schemes under Nakagami-m fading channel with other fading channels such as Rician and Rayleigh and show that the performance of the system is better in case of Nakagami-m fading channels as compared to other fading channels.