基于空间分布稀疏特性的多辐射源直接定位方案  

A Direct Positioning Scheme for Multiple Radiation Sources Based on Sparse Spatial Distribution Characteristics

作　　者：张国梅[1,2] 赵晓丹 尹佳文 金峰 ZHANG Guomei;ZHAO Xiaodan;YIN Jiawen;JIN Feng(School of Information and Communications Engineering,Xi'an Jiaotong University,Xi'an 710049,China;State Key Laboratory of Geo-Information Engineering,Xi'an 710054,China;Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,China)

机构地区：[1]西安交通大学信息与通信工程学院,陕西西安710049 [2]地理信息工程国家重点实验室,陕西西安710054 [3]西安测绘研究所,陕西西安710054

出　　处：《无线电工程》2023年第5期1123-1130,共8页Radio Engineering

基　　金：国家部委基金资助项目。

摘　　要：针对多个时频域混叠的辐射源位置识别问题,提出了一种基于空间分布稀疏特性的无源直接定位方案。分别在接收站采用单天线和天线阵列2种场景下,建立了压缩感知模型和对应的定位优化问题;采用正交匹配追踪和二阶锥规划算法进行稀疏重构,根据稀疏向量映射得到多个辐射源位置。仿真结果表明,所提方案的在线计算复杂度均低于基于网格搜索的直接定位方法,且分布式单天线场景下可获得远优于两步间接定位方案的精度。A passive direct positioning scheme based on sparse spatial distribution is proposed for the position identification of multiple overlapping radiation sources in time-frequency domain.Firstly,the compressed sensing model and the corresponding position optimization problem are established under the scenarios in which the distributed receiving stations are assembled with a single antenna and an antenna array,respectively.Then the orthogonal matching pursuit and the second-order cone programming algorithms are used for sparse reconstruction.Finally the emitters’positions are mapped according to the sparse vector.The simulation results show that the online computational complexity of the proposed scheme is much lower than that of the direct positioning method based on grid search.Moreover,the accuracy of the scheme for the distributed single antenna scenario is much better than that of the two-step indirect positioning scheme.

关 键 词：多辐射源定位 直接定位 压缩感知 稀疏重构 

分 类 号：TN972.4[电子电信—信号与信息处理]