MATLAB Source Code for LDPC 64QAM Simulation

The following is a MATLAB source code example for simulating LDPC-coded 64QAM communication systems. This implementation demonstrates the complete simulation workflow including LDPC encoding, 64QAM modulation, AWGN channel modeling, decoding algorithms, and bit error rate (BER) calculation. The code structure includes key functions for generating LDPC codewords using parity-check matrices, mapping binary data to 64QAM constellation points, adding Gaussian noise to simulate channel impairments, implementing iterative decoding algorithms (such as belief propagation), and computing performance metrics. Researchers can modify parameters like code rate, signal-to-noise ratio (SNR) ranges, and decoding iterations to adapt the simulation for specific research requirements and optimization studies. The implementation utilizes MATLAB's communications toolbox functions where appropriate while maintaining modularity for educational and research purposes.