MATLAB Simulation of ASK, PSK, and FSK Digital Modulation Techniques

This article discusses three fundamental digital modulation techniques: ASK (Amplitude Shift Keying), PSK (Phase Shift Keying), and FSK (Frequency Shift Keying). In digital communications, these modulation schemes are widely implemented to enhance data transmission reliability and efficiency. To facilitate better understanding of these concepts, we provide MATLAB simulation programs for digital signal modulation. The implementations include complete modulation and demodulation processes, allowing readers to comprehensively study the working principles of digital modulation techniques. The MATLAB code demonstrates key algorithmic approaches using built-in functions like cos for carrier generation, randi for random bit sequence generation, and custom demodulation logic involving correlators or envelope detectors. Through practical code examples showing waveform generation, constellation diagrams, and error rate calculations, readers can gain deeper insights into the theoretical foundations and practical applications of digital signal modulation.