8PSK MATLAB Source Code Implementation

This MATLAB source code example demonstrates the complete implementation of 8PSK (8-Phase Shift Keying) modulation and demodulation processes. The program includes essential signal processing stages such as signal generation, 8PSK modulation, channel transmission simulation, coherent demodulation, and bit error rate (BER) calculation.

The implementation features key MATLAB functions including: - Signal constellation mapping using 8 equally spaced phase points (0, π/4, π/2, 3π/4, π, 5π/4, 3π/2, 7π/4) - Digital modulation using phase shifting techniques with cosine and sine carriers - AWGN (Additive White Gaussian Noise) channel simulation with configurable SNR parameters - Maximum likelihood detection for symbol decision making - BER performance analysis through Monte Carlo simulation methods

The code structure follows a systematic approach: generating random binary data streams, mapping bits to 8PSK symbols, applying modulation with carrier signals, adding channel noise, performing phase detection through correlation receivers, and finally comparing transmitted versus received bits to calculate error statistics. This comprehensive example serves as an educational tool for understanding digital communication system design and performance evaluation.