MATLAB Code Implementation for DPSK Signal Modulation and Demodulation

This example demonstrates a comprehensive MATLAB implementation of Differential Phase Shift Keying (DPSK) signal modulation and demodulation using quadrature modulation techniques. DPSK, as a form of differential phase shift keying, transmits information through phase differences between adjacent symbols rather than absolute phase values. The MATLAB code provides a complete workflow including: - DPSK signal generation using phase difference encoding - Quadrature modulation implementation with I/Q components - Demodulation process with phase difference detection - Error rate analysis and performance evaluation Key algorithmic aspects covered in the implementation include: - Symbol mapping using differential encoding techniques - Carrier modulation through cosine and sine functions for I/Q channels - Phase comparison methods for symbol recovery - Bit error rate calculation and signal quality assessment The code incorporates MATLAB's communication toolbox functions where appropriate, while maintaining clear implementation logic for educational purposes. Background information about DPSK principles and quadrature modulation advantages is integrated throughout the example to enhance understanding of the underlying communication concepts. Performance analysis sections demonstrate practical considerations such as noise immunity, bandwidth efficiency, and implementation trade-offs specific to DPSK systems. The implementation serves as both a functional communication system prototype and an educational resource for digital modulation techniques.