【作者】 李从改； 何晨； 蒋铃鸽；

【Author】 LI Cong-gai HE Chen JIANG Ling-ge (Department of Electronic Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

【机构】 上海交通大学电子工程系；

【摘要】 OFDMA多小区系统中,小区边缘用户受到相邻小区的小区间干扰影响,性能严重降低。为此,需要合适的小区间干扰协调技术。干扰协调的目的是提高小区覆盖和增加小区边缘的吞吐量。频率复用是一种重要的小区间干扰协调和提高资源利用率的方法。通过仿真,显示了分别采用三种已有频率复用方法获得的平均的小区吞吐量、小区中心用户的吞吐量和小区边缘用户的吞吐量的累积概率密度。仿真结果显示:仿真的三种方法中,增强的频率复用方法是最佳的。最后,分析了实际系统对小区间干扰协调技术的要求。更多还原

【Abstract】 In the multi-cell system based on OFDMA,cell edge users are affected by inter-cell interference,which decreases the performance of the cell edge users.For this reason,employing an appropriate inter-cell interference coordination technology is essential.Interference coordination aims to improve cell coverage and increase the cell edge throughput.Frequency reuse is an important inter-cell interference coordination method and can improve resource utilization.Through simulations,we show the CDF of users throughput of the cell by using three types of frequency reuse methods.The user throughput include:the average cell throughput,cell-center throughput and cell-edge throughput.The simulation results illustrate that the enhanced frequency reused scheme is best We also analyze the requirements in practical system for inter-cell interference coordination.更多还原