Performance Analysis of Trellis Codes with 8-PSK Modulation in MATLAB

This MATLAB code enables comprehensive performance analysis and evaluation of trellis codes combined with 8-PSK modulation. The implementation utilizes MATLAB's Communications Toolbox functions, including convenc for trellis encoding and pskmod for 8-PSK modulation, to simulate digital communication systems under various channel conditions. Key algorithms implemented include Viterbi decoding for error correction and Monte Carlo simulations for statistical performance analysis. Through systematic BER (Bit Error Rate) calculations and constellation diagram visualizations, the code provides quantitative insights into coding gain, spectral efficiency, and error performance metrics. The simulation framework incorporates AWGN (Additive White Gaussian Noise) channel models and supports parameter customization for different trellis structures and signal-to-noise ratio (SNR) ranges. This implementation serves as an essential toolkit for researchers and communication engineers working on coded modulation schemes, offering practical methods for optimizing trellis code parameters and validating system performance through MATLAB's powerful numerical computing and visualization capabilities. The modular code structure allows easy extension to different modulation schemes and channel models while maintaining accurate performance benchmarking.