OFDMA Power Allocation Classic Literature: MATLAB Implementation of Proportional Resource Allocation Algorithm

In OFDMA systems, power allocation is crucial for ensuring adequate channel capacity and signal-to-noise ratio for each user. To achieve fair resource distribution, researchers have proposed numerous algorithms. The seminal paper "A Low Complexity Algorithm for Proportional Resource Allocation in OFDMA Systems" introduces a computationally efficient method for proportional resource allocation in OFDMA networks. This algorithm optimally distributes transmit power across subcarriers while maintaining proportional rate constraints among users. Our provided MATLAB code implements this algorithm with key functions including channel gain calculation, water-filling power allocation, and proportional fairness optimization. The implementation features adaptive subcarrier assignment and iterative power adjustment loops, allowing users to easily simulate and analyze system performance under various channel conditions. This codebase serves as a practical tool for researchers and engineers to validate the algorithm's efficiency in achieving balanced throughput distribution with low computational overhead.