基于Alamouti的MIMO系统仿真设计  

Simulation design of MIMO system based on Alamouti

作　　者：于子甲[1] 董全德[1] 徐旭[1] YU Zi-jia;DONG Quan-de;XU-Xu(Suzhou University,Suzhou 234000,Anhui China)

机构地区：[1]宿州学院,安徽宿州234000

出　　处：《贵阳学院学报（自然科学版）》2020年第1期106-109,116,共5页Journal of Guiyang University：Natural Sciences

基　　金：2016年省级卓越工程师项目:“软件工程专业卓越工程师教育培养计划”(项目编号:2016zjjh064);2017年安徽省质量工程新工科研究与实践项目:“多方协同共建VR学院”(项目编号:2017xgkxm49);2019年宿州学院重点科研项目:“基于OpenFlow软件定义网络架构的主动防御技术研究”(项目编号:2019yzd04)。

摘　　要：针对传统SISO传输系统误比特率高和信噪比低的问题,提出了基于Alamouti空时编码方案,实现了MIMO系统设计。该方案设计过程为:首先通过Alamouti空时编码技术对系统进行分集,等效出信道矩阵,消除信道传输中的码间串扰,降低系统的误比特率(BER);然后,在接收端使用最佳判决式的解作为MIMO系统的译码准则,明显缩小选择最佳发射信号的捕获空间,减少搜索时间,从而大幅度的简化了接收端的复杂度。最后,通过仿真实验对比分析,提出的方案在低信噪比的情况下系统误码率比较低,可以明显改善系统传输性能。In order to solve the problem of high bit error ratio(BER)and low signal-noise ratio(SNR)in traditional SISO transmission systems,a space-time coding scheme based on Alamouti is proposed in this paper,it realizes the design of MIMO system.The design method of the proposed solution consists of three main operations.Firstly,space-time coding technology of Alamouti is used to diversity the system,which is equivalent to the channel matrix,it can eliminate inter-symbol crosstalk in channel transmission,and reduce bit error rate(BER)of the system.Secondly,the solution of the optimal decision-type is used as the decoding criterion of the MIMO system at the receiving end,which significantly reduces the acquisition space for selecting the best transmitted signal and reduces the search time,thereby it can greatly simplify the complexity of the receiving end.The simulation results demonstrate that the proposed scheme has a relatively low bit error ratio(BER)under low signal-noise ratio(SNR),which can significantly improve the transmission performance of the system.

关 键 词：通信 协议仿真 多输入多输出 误比特率 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]