有限反馈的多小区协作多模传输方法

Coordinated Multi-cell Multi-mode Transmission Scheme with Limited Feedback

多小区协作多天线技术能够有效降低蜂窝系统小区间干扰,提升边缘吞吐率,然而其性能依赖于各基站获取的信道状态信息的准确性和基站间的协作程度.该文以两小区模型为基础,分析了基于有限反馈的信道状态信息对多小区局部联合传输性能的影响,并针对用户在多小区边缘的分布特征,提出基于用户分布位置的多模传输切换策略.仿真结果表明,该策略有效提升了小区边缘吞吐率.

Coordinated multi-cell multi-antenna transmission can effectively mitigate inter-cell interference in cellular MIMO systems,thus improving cell edge throughput.However,the performance heavily depends on the channel state information and cooperation among multiple base stations.In this paper,we investigate the impact of limited feedback on the multi-cell local joint precoding based on 2-cell cooperative transmission. According to the location of cell edge users,we propose a multi-mode transmission method.Simulation results show that it can significantly enhance cell edge throughput.