MATLAB Source Code for FM Signal Modulation and Demodulation Algorithm Simulation

This project presents a comprehensive simulation of FM signal modulation and demodulation algorithms using MATLAB source code. We begin by explaining the fundamental principles and methods of modulation, covering key concepts such as frequency deviation and modulation index. The implementation includes MATLAB functions for generating FM signals with adjustable parameters, demonstrating how carrier frequency varies proportionally with the modulating signal amplitude. Next, we detail the demodulation process, exploring both coherent and non-coherent demodulation techniques. For coherent demodulation, the code implements phase-locked loops (PLL) and frequency discriminators, while non-coherent methods include envelope detection and frequency discrimination approaches. Each algorithm is accompanied by MATLAB functions that showcase practical implementation considerations, such as noise handling and parameter optimization. The complete MATLAB source code provides a working simulation environment where users can: - Generate baseband and FM modulated signals using fmmod() function - Implement demodulators using fmdemod() with configurable parameters - Analyze frequency spectra using FFT algorithms - Evaluate system performance through BER calculations and eye diagrams - Adjust modulation indices and frequency deviations to observe their effects Through this project, you will gain deep understanding of FM signal processing principles and enhance your practical skills in algorithm implementation and simulation analysis. The code includes commented sections explaining key mathematical operations and signal processing techniques, making it suitable for both educational and research applications.