用T形天线进行近场辐射源定位的一种新方法

A Novel Algorithm for Localizing Near-Field Source Using Uniform T-Shaped Linear Array

提出了基于T形阵列近场辐射源定位的一种新方法.首先假定辐射源为远场源,利用两个水平子阵列及近场与远场源的关系确定近场辐射源的距离和入射角,由垂直子阵列确定另一个入射角,再由两个入射角即可确定近场辐射源的仰角与方位角(距离已经确定),得到近场位置坐标;最后在该位置附近采用3D-MUSIC算法进行局部搜索,得到最佳结果.仿真结果表明,该方法在获得精确定位结果的同时,大大缩短了计算时间,有效地提高了定位的实时性.

assumption source A novel algorithm based on a T- shaped of the actual near-field, equations for array for location of near-field source is presented. Under the far-field the bearings of far-field and the range and bearing of the near-field derived from two horizontal subarrays. The range and bearing of the near-field are obtained, and the bearing of another subarray determined. The azimuth and elevation of the near-field source can be determined from two bearings. The location of the near-field can then be estimated. More accurate results can be obtained by a local search. Simulation results show that the algorithm is accurate, effective and suitable for real-time applications.