MSK, QPSK, OQPSK, QAM Digital Modulation Simulator with Algorithm Implementation

This simulation program provides a comprehensive framework for modeling and analyzing various digital modulation schemes, including Minimum Shift Keying (MSK), Quadrature Phase Shift Keying (QPSK), Offset Quadrature Phase Shift Keying (OQPSK), and Quadrature Amplitude Modulation (QAM). The implementation features MATLAB-based algorithms that generate modulated signals, calculate bit error rates (BER), and visualize constellation diagrams and eye patterns. Key simulation components include: - Symbol mapping algorithms using Gray coding for optimal bit-to-symbol assignment - Baseband pulse shaping with raised-cosine filters for spectral control - Carrier modulation/demodulation with coherent detection schemes - Timing synchronization modules with early-late gate detectors - BER performance comparison under additive white Gaussian noise (AWGN) conditions Through this simulator, users can gain practical insights into modulation principles, evaluate system performance metrics, and understand real-world communication system applications. The modular code structure allows for easy extension to additional modulation schemes and channel models.