Decomposition-Based Joint Subcarrier and Power Allocation Algorithm for OFDM Downlink System

In this paper, we propose a decomposition-based joint subcarrier and power allocation algorithm for the downlink OFDM system, which maximizes the system throughput while maintaining each user´s minimum data rate requirement. According to the user-centric decomposition, the proposed algorithm employs a completely novel and distributed architecture for the allocation problem by separating it into the master problem and the subproblems. While the users assist in the subproblems, the computational complexity and feedback overhead are reduced remarkably. Numerical results show that our algorithm provides high throughput in various wireless environments with much lower feedback overhead.