OFDM Water-Filling Algorithm MATLAB Simulation Code

This document presents MATLAB simulation code for the OFDM water-filling algorithm. The implementation provides a flexible framework for system-level simulations, utilizing the core water-filling algorithm that dynamically allocates power across subcarriers based on channel conditions to maximize channel capacity. The codebase includes modular sub-functions that support essential communication system components: channel estimation techniques (such as LS or MMSE estimators), encoding/decoding modules (supporting various error-correction codes), and modulation/demodulation schemes (including QPSK, 16-QAM, etc.). The simulation allows performance comparison between theoretical capacity limits and practical implementation results, enabling accuracy validation through metrics like BER (Bit Error Rate) and spectral efficiency measurements. Furthermore, the code structure facilitates algorithm optimization through parameter tuning and alternative power allocation strategies, potentially enhancing system performance metrics such as throughput and power efficiency. The MATLAB implementation incorporates visualization tools for analyzing power distribution patterns and capacity outcomes across different channel realizations. Overall, this OFDM water-filling simulation code serves as a comprehensive tool for understanding and optimizing wireless communication systems, providing insights into adaptive resource allocation techniques in multi-carrier environments.