MATLAB Implementation of Continuous Phase Modulation (CPM)

This implementation provides a complete MATLAB framework for Continuous Phase Modulation (CPM), incorporating modulation interleaving and Viterbi-based demodulation algorithms. The system supports both single modulation index and dual modulation index configurations, offering flexibility for various communication scenarios. The implementation includes key functions for phase trajectory calculation, symbol mapping, and memory management essential for CPM's continuous phase property. Through MATLAB's simulation environment, users can adjust parameters like modulation index values, pulse shaping filters, and trellis structures to optimize modulation and demodulation performance. The Viterbi decoder implementation features path metric calculation and traceback operations for optimal sequence detection. This framework serves as both an educational tool for understanding CPM principles and a practical foundation for wireless communication system design and performance evaluation. The modular structure allows easy integration of additional features such as different pulse shapes, advanced interleaving schemes, or noise resilience enhancements to meet diverse application requirements.