A Low Complexity Resource Allocation Scheme with Proportional Fairness for MIMO-OFDMA System
一种低复杂度基于公平性的MIMO-OFDMA资源分配方案

This paper presents a new scheme based on proportional fairness for MIMO-OFDM downlink resource allocation to maximize the sum of user data rates, subject to constraints on total power, bit error rate, and proportionality among user data rates. This new scheme embraces the ability to simultaneously exploit space, frequency and multi-user diversity to improve spectrum efficiency. Based on MIMO channel state information, eigen-channels are intelligently used to determine subcarrier allocation and power allocation, which forms the foundation of the new scheme. A linear non-iterative power allocation method with low complexity is deduced that is made by the relaxation of strict user rate proportionality constraints. Simulation results show that this new adaptive allocation scheme can achieve good tradeoff between capacity and fairness, while requiring significantly less computation.