OFDM系统下行链路多小区半分布式资源分配

针对LTE(long-term evolution)系统下行链路采用OFDM技术所致的小区间干扰问题,通过对多种资源分配方法的研究与总结,提出一种简单有效的多小区半分布式资源分配算法。该算法使用二进制功率控制策略,利用基站间的信息交互协调小区间的资源分配,用以改善小区间的干扰,提升系统总容量。通过在LTE系统级仿真平台的建模及仿真,表明新算法提高了13%的吞吐量,由此证明该算法的优越性。

A Half Distributed Resource Allocation Strategy for Multi-Cell OFDM System Downlink Channel

In the downlink channel of LTE system,OFDM technology is adopted.In order to solve the problem of LTE inter-cell interference,the authors present a multi-cell half-distributed resource allocation algorithm by investigating and comparing many resource allocation strategies,which is simple and practical.At the cost of spectrum efficiency,this algorithm uses the mutual information between base stations and binary power control strategy to coordinate the resource allocation which alleviates inter-cell interference and improves system capacity.Through the algorithm in the LTE system level simulation platform implementation,simulation results show that the new algorithm can improve overall throughput by thirteen percent.Thus,it prove that this algorithm has its advantages.