基于预编码方案的多小区多用户MIMO系统干扰抑制研究

摘要

The use of Multiple Input Multiple Output (MIMO) techniques in a wireless communication system provides a significant increase in its throughput, communication reliability and frequency spectrum efficiency through the spatial multiplexing and diversity introduced by the multiple antennas. Multi-user multi-cell MIMO system has been a new area of research in recent years which provides larger increase in system throughput and allows an increase in number of users. However, we have to consider a large of interference generating by multi-user multi-cell MIMO system. This paper provides a pre-coding Scheme for downlink interference mitigation which based on a metric called signal to generating interference, leakage and noise ratio(SGILNR). Simulation results proved that the proposed scheme outperformed the conventional ones.%MIMO技术通过多天线来提高空间分集和复用能够获得比传统单输入单输出系统更高的信道容量、传输可靠性和频谱效率.多小区多用户MIMO系统是MIMO系统发展的一个新方向,它能支持更大的系统吞吐量和更多用户数量.然而,工程应用时必须考虑如何抑制多小区多用户MIMO系统产生的强干扰.本文提出一种以信号与产生的干扰泄漏噪声比(SGILNR)为标准的多小区多用户MIMO系统抑制下行方向干扰的预编码方案.仿真结果表明,这种预编码方案优于多用户波束成形方案和独立注水法方案.