Performance Assessment of M-ary ASK, FSK, PSK, QAM and FQAM in AWGN Channel

The ever growing demand for high data rates with optimum bandwidth usage and better quality need to be addressed by modern digital communication systems. Choosing a better modulation technique that provides higher immunity to noise and channel distortion along with optimum bandwidth usage could be a possible solution. The main objective of this paper is to give an overview of various digital modulation techniques employed in wireless Communication systems and to conclude with a better modulation technique among them. This paper presents analysis of different modulation techniques such as Amplitude Shift Keying (ASK), Phase Shift Keying (PSK), Frequency Shift Keying (FSK), Quadrature Amplitude Modulation (QAM), and the novel modulation technique: Hybrid Frequency and Quadrature Amplitude Modulation (HFQAM), with the help of MATLAB. These comparisons yield HFQAM as a better choice for communicating in a wireless channel with better efficiency and optimum bandwidth.