MATLAB Implementation of 16QAM Modulation with Source Code

In this document, we present a MATLAB implementation of 16QAM modulation along with comprehensive bit error rate analysis. The source code provides a complete framework for implementing 16QAM modulation, featuring constellation mapping, signal generation, and demodulation components. The implementation includes critical functions for symbol mapping using Gray coding to minimize adjacent symbol errors, carrier modulation with adjustable parameters, and AWGN channel simulation for realistic transmission conditions. The bit error rate analysis module enables performance evaluation under various signal-to-noise ratio (SNR) conditions, allowing users to assess transmission reliability across different channel scenarios. The code structure supports easy modification of modulation parameters, noise levels, and transmission schemes, making it suitable for educational purposes and system optimization studies. Key algorithmic components include: - Constellation point generation with optimal spacing - Symbol-to-bit mapping/demapping algorithms - Monte Carlo simulation for BER calculation - Performance comparison with theoretical values This implementation helps users understand 16QAM modulation principles, practical implementation techniques, and performance evaluation methods. The modular design facilitates customization for specific research requirements and system optimization studies.