MATLAB Functions for Digital Modulation

This article presents 12 MATLAB functions designed for digital communication system development. The functions implement core modulation schemes including Binary Phase Shift Keying (2PSK), Quadrature Phase Shift Keying (4PSK), 8-level Phase Shift Keying (8PSK), and 16-level Quadrature Amplitude Modulation (16QAM). The implementation features configurable parameters for symbol rate, carrier frequency, and signal-to-noise ratio (SNR) settings. Key functions include: - Modulation generators using phase mapping algorithms for PSK schemes - QAM modulation with optimal constellation point arrangement - Constellation diagram visualization with scatter plot functionality - AWGN (Additive White Gaussian Noise) channel modeling - Signal analysis tools for measuring error rates and signal quality These functions provide a complete framework for signal processing tasks, communication system simulation, and educational demonstrations. Each function includes error checking and parameter validation to ensure reliable operation across various simulation scenarios.