5 Modulated Signal Simulation Methods with Code Implementation

In this article, I present my custom implementations of five modulated signal simulation methods: Continuous Phase Frequency Shift Keying (CPFSK), Frequency Modulation (FM), Amplitude Modulation (AM), Quadrature Phase Shift Keying (QPSK), and Single Sideband Modulation (SSB). The implementations include detailed algorithm explanations covering modulation principles, signal generation techniques, and key MATLAB functions for waveform synthesis and analysis. For CPFSK, the simulation demonstrates phase continuity maintenance through integrated frequency transitions. The FM implementation features instantaneous frequency variation modeling using Bessel functions. AM simulation includes carrier signal multiplication with message signals and envelope detection methods. QPSK implementation covers quadrature component separation, constellation mapping, and phase shift handling. SSB simulation focuses on Hilbert transform applications for sideband suppression and frequency shifting techniques. I hope these comprehensive simulations with their technical insights prove valuable for signal processing applications and educational purposes.