MATLAB Simulation of π/4-DQPSK Modulation and Demodulation

This article presents the MATLAB simulation source code for π/4-DQPSK modulation and demodulation. Please note that this digital modulation/demodulation technique represents a significant advancement in wireless communications due to its improved spectral efficiency and interference resistance. The simulation includes key components such as differential phase encoding, constellation rotation handling, and coherent detection algorithms. Furthermore, this modulation scheme finds practical applications in digital audio broadcasting and satellite communications. By studying this MATLAB implementation, which features signal constellation plotting, phase shift calculations, and error rate monitoring functions, you can gain deeper insights into the operational principles and practical implementations of this technology. The code demonstrates how to handle quadrature phase shifts, manage symbol transitions, and evaluate system performance under noisy channel conditions.