一种搜索匹配式相位干涉仪测角方法

Angle Searching Algorithm of Interferometer Based on Phase-matching

针对空间噪声环境下非均匀相位干涉仪测角算法模糊的问题,提出一种基于相位矢量相关匹配处理的搜索式测角算法。对天线阵测量得到的相位差值构建相位矢量,根据阵列流型重构角度估计值对应的相位差矢量,在测角范围内进行相关匹配,根据匹配结果的极值搜索角度估计值,并针对非均匀线阵匹配算法代价函数峰值的特点,对全局搜索算法进行改进,提出局部搜索匹配算法,进一步提高测角性能。算法具有原理简单、性能稳健的特点,解决了直接利用相位差导致失配的问题,并且对相位噪声的适应能力较强。大量的计算机仿真实验结果表明,非均匀线阵搜索匹配式测角及其改进算法具有良好的测角性能和稳健性。

A searching algorithm of angle measurement based on the phase vector correlation and matching processing is proposed in accordance with the problem of ambiguity while using the non-uniform phase interferometer in the spatially noise environment in this paper.The proposed local searching method is based on the cost function and the matching result of the phase vectors which are built on the phase difference measured by the antenna array and estimated according to the array manifold within the measurement range of angle.The analysis and simulation results show that the searching algorithm of angle measurement based on the phase vector correlation and matching processing and its improved algorithm are efficient to the problem and robust in the angle measurement with phase noise.