基于互相关的分布式多信源交叉定位算法  

Cross-locating algorithm for distributed multiple sources based on cross-correlation

作　　者：陈增茂 葛梁 白永珍[1] CHEN Zengmao;GE Liang;BAI Yongzhen(College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2021年第10期1543-1549,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51879046);中央高校基本科研业务费专项资金项目(3072021CF0809);黑龙江省高精度卫星、导航及海洋应用重点实验室开放基金项目(HKL-2021-Y02).

摘　　要：非相干分布式信源的不相关散射分量会造成波达方向估计性能下降,同时当信源数大于空间观测站的数量时,通过交叉定位方法确定信源位置会出现模糊点。针对上述问题,本文提出一种基于互相关的非相干分布式多信源交叉定位算法。该算法先通过2个较远阵列接收数据之间的互相关性,减弱不相关的散射分量对DOA估计的影响;再通过2个阵列接收信号之间的角度关联性,对信号子空间进行重构,得到每个信源相对于2个阵列的不同入射角,最后利用交叉定位的方法即可确定信源位置。该算法通过角度匹配的方法解决了双站交叉定位存在虚假点的问题。仿真分析表明:所提算法可以自动将2个阵列的入射角与信源相对应,且算法估计性能较好,适用于需要进行多目标定位但阵列资源受限的情况。The uncorrelated scattering components of incoherently distributed sources lead to performance loss in the direction of arrival(DOA)estimation.When the number of sources is greater than the number of space observation stations,fuzzy points appear while a cross-locating algorithm is used to determine source locations.To solve these problems,this study proposes a cross-locating algorithm for incoherent distributed multiple sources that is based on cross-correlation.First,the proposed algorithm reduces the influence of uncorrelated scattering components on DOA estimation through the cross-correlation between the data received by two distant arrays.Second,through the angular correlation between the signals received by two other arrays,the signal subspace is reconstructed to obtain the different incident angles of each source relative to the two arrays.Finally,the source location can be determined using the cross-locating algorithm.The algorithm solves the problem of false points in bistatic cross-positioning via angle matching.Simulation analysis shows that the proposed algorithm can automatically match the incident angles of two arrays with the source and realizes strong estimation performance,which is suitable for multitarget locations with limited array resources.

关 键 词：阵列信号处理 互相关矩阵 DOA估计 阵列扩展 非相干分布式信源 交叉定位 多目标测向 泰勒展开 

分 类 号：TN911.72[电子电信—通信与信息系统]