不相关瑞利衰落下大规模MIMO预编码性能分析  

Massive MIMO precoding performance analysis under uncorrelated rayleigh fading model

作　　者：方莹 吴君钦[1] 王成敏 FANG Ying;WU Junqin;WANG Chenmin(School of Information Engineering,Jiangxi University of science and technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学信息工程学院,江西赣州341000

出　　处：《电视技术》2018年第9期37-41,共5页Video Engineering

基　　金：国家自然科学基金应急管理项目(61741109);国家自然科学基金青年基金项目(61501210)

摘　　要：在多小区多用户蜂窝网络移动通信系统中,线性检测器和预编码技术对于大规模MIMO系统容量有着至关重要的作用。针对上述问题,在不相关瑞利衰落信道模型下,对大规模多输入多输出(MIMO)上行链路(UL)和下行链路(DL)的系统容量进行了分析,分析过程中首先使用MMSE估计信道,推导出上下行链路遍历容量表达式,并实验仿真得到几种线性预编码器和检测器的性能结果。实验结果表明,在有导频污染的情况下,上行链路中MMSE检测技术最佳,下行链路中RZF预编码技术最佳。In a multi - cell multi - user cellular network mobile communication system, linear detectors and precoding techniques play a crucial role in the capacity of large - scale MIMO systems. In view of the above problems, this paper analyzes the system capacity of large - scale multiple - input multiple - output （MIMO） uplink （UL） and downlink （DE） under the uncorrelated Ray leigh fading channel model. The MMSE estimates the channel, derives the uplink and downlink ergodic capacity expressions, and experimentally simulates the performance results of several linear precoders and detectors. Experimental results show that in the case of pilot pollution, the MMSE detection technology is the best in the uplink, and the RZF precoding technology is the best in the downlink.

关 键 词：大规模多输入多输出(MIMO) 信道估计 导频污染 线性检测器 线性预编码 

分 类 号：TN92[电子电信—通信与信息系统]