一种用于MIMO组簇系统的自适应预编码技术

摘要： 针对多小区内多输入多输出（MIMO）的组簇系统，提出了一种有效提升系统性能的预编码技术.该技术根据相邻时隙内用户信道状态信息变化程度，决定每个用户在两种预编码下的码字.中心处理节点为每个小区自适应分配预编码后，使用1 bit指示符号通知各小区基站所选定的预编码.仿真结果表明，本文中提出的自适应预编码技术与传统技术相比，可以较大地提升系统吞吐量，同时有效地降低了系统后台的反馈开销.
关键词：中图分类号：文献标志码： A
An Adaptive Precoding Technology for MIMO Cluster System
LI Xiu na,LUO Han wen,DING Ming,LIU Wei,MA Ji peng
Abstract： An efficient precoding technology was proposed for multi cell multiple input multiple output (MIMO) system consisting of several clusters. According to the variation of channel state information (CSI) in two contiguous slots, the central processor determines users’ precoding codeword between two precoding schemes and uses extra 1 bit overhead to indicate the selection scheme. The simulation results show that the proposed scheme can achieve better throughput performance and cut down the sum backhaul overhead than the traditional schemes.
Key words： multi cell; intra cluster interference; adaptive precoding; signal to noise ratio

An Adaptive Precoding Technology for MIMO Cluster System

An efficient precoding technology was proposed for multi cell multiple input multiple output (MIMO) system consisting of several clusters. According to the variation of channel state information (CSI) in two contiguous slots, the central processor determines users’ precoding codeword between two precoding schemes and uses extra 1 bit overhead to indicate the selection scheme. The simulation results show that the proposed scheme can achieve better throughput performance and cut down the sum backhaul overhead than the traditional schemes.