基于相位干涉仪的极化和到达角的联合估计

Joint estimation of polarization and arrival angle based on phase interferometer

传统干涉仪天线通常是单极化的,不能测量电波的极化特征。在传统干涉仪阵列天线的基础上增加一个正交极化天线,构成极化干涉仪,它能同时测量电磁波的极化特征和到达角,并且具有硬件结构简单、易于实现等特点。建立了极化干涉仪的理论模型,提出了极化参数和到达角的频域估计方法和时域估计方法,比较了两种方法的优缺点。仿真结果证明了理论模型和算法的正确性。

As the traditional phase interferometer is composed of single polarization antennas, it can＇t measure the polarization of the incident wave. A polarization-phase interferometer is constituted by adding an orthogonal polarization antenna to the traditional one. It can be used to measure the polarization and arrival angle simultaneously, and has the advantages of simple configuration which is suitable for realization, The theory of the polarization-phase interferometer is established. The estimation methods of polarization parameters and arrival angle are given in time domain and frequency domain respectively. The advantages and disadvantages of the two methods are compared as well. Simulation results show the correctness of the theory and the algorithm.