Simulation of ASK, FSK, and PSK Encoding and Decoding

This MATLAB simulation program implements encoding and decoding processes for Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK), and Phase Shift Keying (PSK) modulation techniques. The implementation includes key functions such as signal modulation using built-in MATLAB functions like pskmod() and fskmod(), and demodulation using corresponding demodulation functions. The simulation features comprehensive bit error rate (BER) analysis through comparison of transmitted and received data sequences using error calculation algorithms. Various parameters including signal-to-noise ratio (SNR), carrier frequency, and sampling rate can be adjusted to evaluate performance under different channel conditions. The program also incorporates channel modeling capabilities to simulate noise and fading effects using AWGN channel functions and Rayleigh fading models. Additional signal processing techniques such as filtering and equalization can be integrated to enhance system performance, allowing for deeper analysis and optimization of digital communication systems.