多径环境下基于检索信号子空间的直接定位算法  

Direct position determination algorithm based on retrieval signal subspace in multipath environments

作　　者：万鹏武 李文杰 彭康 温一凡 段晨晨 WAN Pengwu;LI Wenjie;PENG Kang;WEN Yifan;DUAN Chenchen(School of Communications and Information Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,China;Shaanxi Key Laboratory of Information Communication Network and Security,Xi’an 710121,China)

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121 [2]陕西省信息通信网络及安全重点实验室,陕西西安710121

出　　处：《西安邮电大学学报》2024年第6期11-19,共9页Journal of Xi’an University of Posts and Telecommunications

基　　金：国家自然科学基金项目(62101441);西安邮电大学研究生创新基金一般项目(CXJJYL2021073)。

摘　　要：针对多径环境下直接定位(Direct Position Determination,DPD)算法性能下降的问题,提出一种多径环境下基于检索信号子空间的直接定位算法。该算法采用重构噪声子空间的多重信号分类算法在提取信号子空间与噪声子空间的同时降低阵列信号相关性,并基于噪声子空间估计信号到达角度(Angle of Arrival,AOA)解算多个辐射源位置。为降低所提算法的复杂度,等间隔划分目标区域求得多个辐射源权重位置,再联立信号子空间与权重位置检索信号子空间中视距(Line-of-Sight,LOS)分量最大的阵列元素,采用稀疏算法识别目标辐射源位置。仿真结果表明,所提算法明显优于传统的两步定位法和重构噪声子空间的多重信号分类(Reconstructing Noise Subspaces Multiple Signal Classification,IRNSMUSIC)算法,能够提升多径环境下直接定位算法的定位精度。In order to address the performance degradation of the direct position determination(DPD)algorithm in a multipath environment,a DPD algorithm based on retrieval signal subspace is proposed.It adopts the multiple signal classification algorithm of the reconstructing noise subspaces to reduce the array signal correlation while extracting the signal subspace and noise subspace.The signal angle of arrival(AOA)is estimated based on the noise subspace,and multiple radiation source position vectors are solved.To reduce the complexity of the algorithm,the target area is divided into equal intervals to obtain the weight position vectors of multiple radiation sources.Then,the signal subspace and the weight position vectors are linked to identify the array element with the largest line-of-sight(LOS)component in the signal subspace.The sparse algorithm is used to identify the location of the target radiation source.Simulation results show that the proposed algorithm is obviously better than the traditional two-step localization method and the IRNSMUSIC algorithm,and can improve the localization accuracy of the direct localization algorithm in multipath environments.

关 键 词：信号子空间 直接定位算法 噪声子空间 视距 非视距 多重信号分类 稀疏算法 

分 类 号：TN911.7[电子电信—通信与信息系统]