MIMO系统中基于Alamouti空时编码的性能仿真  

Performance Simulation Based on Alamouti Space-time Coding in MIMO System

作　　者：张钧鑫 张徐芳 李卓航 习彤 姜军 ZHANG Jun-xin;ZHANG Xu-fang;LI Zhuo-hang;XI Tong;JIANG Jun(School of Information Science and Technology,Tibet University,Lhasa Tibet,850000;National Experimental Teaching Demonstration Center for Information Technology,Tibet University,Lhasa Tibet,850000)

机构地区：[1]西藏大学信息科学技术学院,西藏拉萨850000 [2]西藏大学信息技术国家级实验教学示范中心,西藏拉萨850000

出　　处：《山西大同大学学报（自然科学版）》2023年第6期21-25,共5页Journal of Shanxi Datong University(Natural Science Edition)

基　　金：国家自然科学基金资助项目[62261051]。

摘　　要：多输入多输出(Multiple-Input Multiple-Output,MIMO)系统是一种利用多个天线进行数据传输和接收的技术,现已广泛应用于无线通信领域。Alamouti编码作为一种常用的MIMO系统编码方案,可以充分利用空时编码的优势,在多输入多输出系统中同时传输多个信号,从而大幅度提高信道容量和系统吞吐量,为无线通信系统的性能提升和优化做出了重要贡献。介绍了MIMO系统和Alamouti空时编码模型,仿真使用BPSK和QPSK两种调制方式,将Alamouti空时编码与AWGN信道、Rayleigh信道下的情况进行比较,观察不同调制情况下的接收星座图,通过对不同系统模型的误码率性能进行分析,验证了Alamouti空时编码方案在低信噪比的情况下具有较好的误码率性能。Multiple-Input Multiple-Output( MIMO) system is a technology that uses multiple antennas for data transmission and reception.It has been widely used in the field of wireless communication.As a commonly used MIMO system coding scheme,Alamouti coding can make full use of the advantages of space-time coding to transmit multiple signals simultaneously in a multiple-input multiple-output system,thereby greatly improving channel capacity and system throughput.Therefore,Alamouti coding has made important contributions to the performance improvement and optimization of wireless communication systems.This paper introduces the MIMO system and the Alamouti space-time coding model.The simulation uses BPSK and QPSK modulation methods.The Alamouti space-time coding is compared with the AWGN channel and the Rayleigh channel.The receiving constellation diagram under different modulation conditions is observed.By analyzing the bit error rate performance of different system models,it is verified that the Alamouti space-time coding scheme has better bit error rate performance in the case of low signal-to-noise ratio.

关 键 词：多输入多输出 误码率 无线通信 ALAMOUTI 空时编码 

分 类 号：TN929.5[电子电信—通信与信息系统]