MATLAB Code Implementation for Digital Communication Simulation

This article provides MATLAB source code implementations for digital communication simulations, covering various modulation techniques including BPSK (Binary Phase Shift Keying), AM (Amplitude Modulation), and QPSK (Quadrature Phase Shift Keying). The simulation codes implement core digital communication algorithms such as signal modulation/demodulation, channel modeling, and error rate calculations. Each implementation includes detailed explanations of key MATLAB functions like pskmod() for phase modulation, awgn() for additive white Gaussian noise channel simulation, and berawgn() for theoretical bit error rate analysis. The provided source codes help users understand fundamental principles and operational mechanisms of digital communications through practical implementation examples. Additional detailed documentation and sample scenarios are included to assist users in conducting actual digital communication simulation experiments, enabling comprehensive exploration of different communication schemes and their performance characteristics under various channel conditions.