Modulation Simulation GUI with Comprehensive Digital Modulation Analysis Tools

This article presents a comprehensive GUI-based simulation framework featuring a main graphical interface controller and five specialized digital modulation processing modules: 2-ASK (Amplitude Shift Keying), 2-FSK (Frequency Shift Keying), 2-DPSK (Differential Phase Shift Keying), 2-MSK (Minimum Shift Keying), and M-DPSK (Multiple Differential Phase Shift Keying) simulators. Each module implements core modulation algorithms through MATLAB's communication toolbox functions, featuring real-time constellation diagram visualization and bit error rate (BER) calculation capabilities. Additionally, the system includes a comparative performance analysis module that evaluates modulation schemes against key parameters like bandwidth efficiency and power consumption, plus a dedicated 2-FSK theoretical validation module that compares simulated BER results against theoretical curves using Q-function implementations. Through detailed code walkthroughs covering signal generation, modulation/demodulation workflows, and performance metric calculations, readers will gain practical understanding of digital communication system implementation and apply these tools to their specific research or development requirements.