MATLAB Implementation of Phase-Locked Loop (PLL) with Simulation Code

This phase-locked loop program is implemented using MATLAB to simulate the working process of a genuine phase-locked loop system. The code operates by sampling input signals and comparing them with reference signals, generating an error signal that serves as a phase control signal to adjust the input signal's phase. The implementation typically includes three main components: a phase detector that calculates phase differences, a loop filter (often a proportional-integral controller) that processes the error signal, and a voltage-controlled oscillator that adjusts the output frequency based on the filtered error. Phase-locked loops are particularly valuable for maintaining phase synchronization during signal processing, thereby enhancing signal transmission quality. This MATLAB implementation can be applied to various domains including communication systems, measurement equipment, and audio processing devices, making it highly valuable for both educational and practical applications. The code structure demonstrates real-time phase adjustment algorithms and provides insights into digital PLL design methodologies.