针对正交频分多址无线蜂窝系统下行链路,提出一种基于用户速率调和均值公平的多小区干扰协调功率分配算法.为了优先减轻小区边缘用户的同频干扰,把多小区功率分配问题建模为一个以用户速率调和均值公平为目标的非凸优化问题,并提出一种迭代算法求其接近最优解.该算法需要相邻的基站通过交互干扰信息进行相互协作.仿真结果表明,该算法在保证小区中心用户有较高通信速率的同时,极大提升了小区边缘用户的通信速率.
We propose a multi-cell power allocation algorithm based on harmonic mean fairness of users' rate for interference coordination in downlink OFDMA-based wireless cellular system. In order to mitigate the co-channel interference of cell edge users first, we formulate the multi-cell power allocation problem as a non-convex optimization problem with an objective of harmonic mean fairness of users' rate, and propose an iterative algorithm to work out the near-optimal solution to the problem. The algorithm requires cooperation between the adjacent base-stations by exchanging interference messages. Simulation results show that the proposed algorithm achieves a high data rate of cell center users, while greatly enhances the data rate of cell edge users.
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