Abstract: For the low performance of cell-edge users in OFDMA networks, an improved algorithm of interference coordination based on that the equal performance will not be depressed is proposed, which can improve the performance of the cell-edge users. In order to treat the problem of the service of the users in cell-edge and cell-center, combining with RRM technology, the users in cell-edge choose channels prior to the users in cell-center, and the power of them is controlled. The results indicate that the algorithm can improve 35 percent to 40 percent of the total performance and the performance of users in cell-edge is not depressed.

Key words: Orthogonal Frequency Division Multiple Access（OFDMA）, downlink, power control, interference coordination

摘要： 针对OFDMA网络中提高总体性能导致小区边缘用户性能下降的问题，在不影响系统平均性能的前提下，提出一种改进边缘用户性能的下行干扰协调算法。该算法根据小区中心和边缘用户的业务量，结合无线资源管理技术，对小区边缘用户优先选择分集效应较好的信道，对用户进行补偿式功率控制。仿真结果表明，提出的改进算法在不影响小区边缘用户的性能前提下，可以提高系统的总体性能的35%到40%。

关键词: 正交频分复用多址, 下行链路, 功率控制, 干扰协调