2*2MIMO系统模型搭建及误码率分析  

2*2 MIMO System Model Construction and Error Rate Analysis

作　　者：姜英爽 刘东林 曹喜生 JIANG Yingshuang;LIU Donglin;CAO Xisheng(Tianshui Normal University,Tianshui 741000,Gansu,China;Tianshui Electric Drive Research Institute Group Co.,Ltd.,Tianshui 741020,Gansu,China;State Key Laboratory of Electric Drive System and Equipment Technology,Tianshui 741020,Gansu,China)

机构地区：[1]天水师范学院,甘肃天水741000 [2]天水电气传动研究所集团有限公司,甘肃天水741020 [3]大型电气传动系统与装备技术国家重点实验室,甘肃天水741020

出　　处：《电气传动自动化》2024年第4期67-70,共4页Electric Drive Automation

基　　金：甘肃省教育厅2023年度高等学校科研项目(2023CXZX-812)。

摘　　要：针对普通单天线收发系统无法满足现有互联网通信容量日益增大的问题,提出了一种多天线技术MIMO(Multiple Input Multiple Output)。首先搭建了2*2MIMO通信系统,其中发送端包括QPSK映射模块和Alamouti编码模块,信道为瑞利衰落信道,接收端包括最大比合并模块;然后对所设计的系统用Matlab软件进行了仿真;最后通过仿真对2*2MIMO系统的误码率性能进行了分析。仿真结果表明,2*2MIMO系统比2*1MIMO系统在相同信噪比的情况下误符号率性能更好,证实了2*2MIMO系统可增大信道的容量并提高系统的可靠性。Aiming at the problem that the common single antenna transceiver system cannot meet the increasing communication capacity of the existing Internet,a multi antenna technology MIMO(Multiple Input Multiple Output)is presented.Firstly,a 2*2MIMO communication system is built,where the transmitting end includes a QPSK mapping module and an Alamouti encoding module,the channel is a Rayleigh fading channel,and the receiving end includes a maximum ratio combining module;Then,the designed system is simulated by Matlab software;Finally,the error rate performance of the 2*2MIMO system is analyzed through simulation.The simulation results show that the 2*2MIMO system has better symbol error rate performance than the 2*1 system under the same signal-to-noise ratio,which confirms that the 2*2MIMO system can increase channel capacity and improve system reliability.

关 键 词：2*2MIMO Alamouti编码 QPSK调制解调 误符号率 

分 类 号：TN914[电子电信—通信与信息系统] TN82[电子电信—信息与通信工程]