DefinePK

Abstract

With the fast development of modern communication techniques, the demand for reliable high data rate transmission is increased significantly. Different modulation techniques allow researchers to send different bits per symbol achieving different and higher throughputs or efficiencies. Because of its efficiency in power and bandwidth, M-ary Quadrature Amplitude Modulation (M-QAM) is one of widely used modulation techniques in the practice. Therefore, a need of studying and evaluating the performance of QAM modulation schemes is an important task for designers. In this paper, M-QAM modulation schemes for even number of bits per symbol (32- and 128-QAM) and for odd number of bits per symbol (16- and 64-QAM), over Additive White Gaussian Noise (AWGN) channel, are studied. A Simulink-based simulation model for M-ary QAM is designed. Theoretical and simulation results for Bit Error Ratio (BER) performance of QAM modulation schemes are obtained using Matlab/Simulink and Matlab/BERTool. The results are evaluated and compared.