基于分布式MIMO网络的室内终端单站定位技术  

Indoor terminal localization technology using a single access point based on distributed MIMO networks

作　　者：李泽[1] 邹建 黄曾 田增山[2] LI Ze;ZOU Jian;HUANG Zeng;TIAN Zengshan(Key Laboratory of Industrial Internet of Things and Networked Control,Ministry of Education,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;School of Communications and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学工业物联网与网络化控制教育部重点实验室,重庆400065 [2]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《通信学报》2023年第12期193-205,共13页Journal on Communications

基　　金：国家自然科学基金资助项目(No.92267106);重庆市自然科学基金博士后科学基金资助项目(No.CSTB2023NSCQ-BHX0160)。

摘　　要：针对分布式MIMO网络中的终端定位问题,提出了基于分布式MIMO网络的室内终端单站定位系统。首先,将接入点天线布置在室内不同的位置,并利用压缩感知算法对终端每个天线上接收路径的离开角(AoD)和飞行时间(ToF)进行估计;其次,联合多个路径的AoD和ToF建立非线性定位模型,并利用一种改进的Levenberg-Marquardt算法进行求解;再次,理论分析了定位误差的影响因素以及给出了天线布局的理论依据;最后,利用电磁仿真软件和软件无线电平台进行了仿真和实测验证,仿真和实测结果表明,所提定位系统的性能优于现有基于自然多径辅助的单站定位系统。Regarding the terminal localization in distributed MIMO networks,an indoor terminal localization system us-ing a single access point(AP)based on distributed MIMO networks was proposed.Firstly,the AP’s antennas were ar-ranged at different locations in the room,and the compressed sensing algorithm was used to estimate the angle of depar-ture(AoD)and time of flight(ToF)of the receiving path on each antenna of the terminal device.Secondly,AoDs and ToFs of multiple paths were combined to establish a nonlinear localization model,and an improved Levenberg-Marquardt algorithm was used to solve the problem.Then,theoretical analysis has been examined for the factors that influence the lo-calization error,and the criteria for the antenna layout was provided.Finally,electromagnetic simulation software was used to build simulation environment and conducted the simulation for system verification.Moreover,software-defined radio platforms were used to conduct practical tests.Both simulation and experimental results indicate that the performance of the proposed localization system is superior to existing single-AP localization systems based on natural multipath.

关 键 词：室内定位 离开角 飞行时间 分布式MIMO 

分 类 号：TN92[电子电信—通信与信息系统]