LTE下行链路信道采用扩展单环MIMO信道模型进行建模的研究  

A Performance Study of LTE Downlink Channel Modeling Using the Extended One-Ring MIMO Channel Model

作　　者：赵磊 ZHAO Lei(Guangzhou Metro Design&Research Institute Co.,Ltd.,Guangzhou 510631,China)

机构地区：[1]广州地铁设计研究院股份有限公司,广东广州510631

出　　处：《电声技术》2022年第6期150-156,共7页Audio Engineering

摘　　要：本文主要研究如何对LTE下行链路中的信道采用扩展的单环多入多出(Multiple Input Multiple Output,MIMO)信道模型进行建模,并进行性能的研究。在假设信道状态信息(Channel State Information,CSI)已知的情况下研究该扩展的单环MIMO模型的系统误符号率(Symbol Error Ratio,SER)性能,进而讨论天线的相关性对性能的影响,并分别针对采用空时块码(Space Time Block Code,STBC)、垂直分层空时码(Vertical-BLAST,V-BLAST)以及空频块码(Space Frequency Block Code,SFBC)编码的系统误符号(SER)性能进行比较。仿真结果显示,通过增加在eNodeB(eNB)端的天线元间距,能够得到比增加用户设备(UE)端天线元间距更优异的性能。从空时块码、垂直分层空时码、空频块码三种编码方式的比较中可以发现,空频块码(SFBC)的性能最优,垂直分层空时码(V-BLAST)的性能最差。This paper mainly studies how to model the channel in LTE downlink using the extended single ring MIMO channel model,and studies its performance. Under the assumption that the Channel State Information(CSI) is known, the system Symbol Error Rate(SER) performance of the extended one-ring Multiple Input Multiple Output(MIMO) model is studied, and then the impact of antenna correlation on performance is also discussed. The system error performance of Space Time Block Code(STBC) scheme, Vertical Bell Labs layered Space-Time code(V-BLAST) scheme and Space-Frequency Block Code(SFBC) scheme are compared. The simulation results show that by increasing the antenna spacing at the transmitter at the base station, better performance can be obtained than increasing the antenna spacing of the mobile receiver. In the comparison of the three coding methods of space-time block code, vertical layered space-time code, and space-frequency block code, it can be found that the performance of Space-Frequency Block Code(SFBC)is the best, and that of Vertical Bell Labs layered Space-Time Code(V-BLAST) is the worst.

关 键 词：扩展单环模型 误符号率(SER) 空时块码(STBC) 垂直分层空时码(V-BLAST) 空频块码(SFBC) 

分 类 号：TN929.5[电子电信—通信与信息系统]