多基线近场目标几何对消比相测角算法  

An Angle Measurement Algorithm for Multi-Baseline Interferometer Under Near Field Target Geometry

作　　者：何靖 周玲厚 

机构地区：[1]北京遥感设备研究所,北京100854 [2]山东工商学院,山东烟台264005

出　　处：《测控技术》2015年第2期137-139,143,共4页Measurement & Control Technology

摘　　要：针对目标距离多基线天线阵较近条件下,平行波相位模型失效的问题,提出了一种基于几何对消的多基线比相测角解模糊算法。首先根据多基线天线阵的布局特点与近场目标的回波特性,建立了近场目标回波的相位模型,结合近场目标回波的特点和平行波逐次递推解模糊测角算法,推导了几何对消测角算法,并给出了算法的实现步骤。该算法具有原理简单、性能稳健的特点,解决了平行波测角算法目标近场模型失配的问题,并且同样适用目标处于远场条件下。大量的计算机仿真试验结果表明,基于近场模型的几何对消测角算法在目标远近、静态及动态条件下均具有良好的测角性能和稳健性。Under the closer condition of target distance phase interferometer antenna array,parallel wave phase model leads to failure problems.To address this issue,one kind fuzzy algorithm based on the geometric cancellation interferometer angle measurement is presented.Firstly,according to the layout characteristics of interferometer antenna array and the echo characteristics of near field target,the phase model of near field target echo is established,combined with the near field target echo characteristic and parallel wave successive recursive solution to fuzzy angle-measurement algorithm,geometry cancellation angle-measurement algorithm is derived,and the algorithm implementation steps are given.The algorithm has the advantages of simple principle,stable performance,and solves the problem of parallel wave angle measurement algorithm for near field model mismatch,and also holds true target in the far field condition.A large number of computer simulation results show that geometric cancellation angle-measurement algorithm based on the near field model has good estimation performance and robustness in target distance,static and dynamic conditions.

关 键 词：相位干涉仪 平行波 近场目标 逐次递推解模糊 

分 类 号：TP911[自动化与计算机技术]