Comparative Analysis of Frequency Shift Keying (FSK) and Gaussian Frequency Shift Keying (GFSK) Modulation Techniques over an AWGN Channel in MATLAB

In the recent years, an expeditious growth in the demand for wireless communication applications has increased potential research being carried out in digital modulation techniques. GFSK modulation, a continuous phase variant of FSK modulation has been popular these days for numerous high data rate applications in digital communication systems. The simulations of both the modulation schemes have been carried out over an AWGN channel in MATLAB 15.0. It has been observed that BER for GFSK modulation shows an improvement compared to FSK modulation at all the SNR values leading to high PTE. Besides, the periodogram of the GFSK modulated signal has been observed to have a higher PSD at the respective carrier signal frequency showing higher spectral efficiency for GFSK modulation.