极化信号频率、二维到达角和极化参数的同时估计

Joint Estimation of Frequency, 2-D DOA and Polarization of Polarized Signal

本文研究基于标量传感器和/或空域完全伸展矢量传感器极化敏感时间双采样、空间欠采样阵列的多个宽频段窄带极化信号中心频率、二维波达方向和极化参数的同时估计问题。针对时、空多分辨采样数据,利用旋转不变参数估计方法分别估计出与信号频率有关的时间相位因子和对应的含有空间相位信息的所谓混合导向矢量。对估计出的信号时间相位因子的模和相角进行联合,获得模拟频率估计:利用混合导向矢量中还包含的与空间采样间隔无关的极化-角度相干结构信息去除方向余弦估计中的整周模糊并获得相应的极化参数估计。

This paper addresses the problem of simultaneous estimation of center frequency, two-dimensional direction of arrival and polarization of multiple narrowband signals over wide frequency band, involving the use of a polarization sensitive array comprising scalar sensors and/or fully spatially stretched vector sensor（s）. In the given method and its modification version, ESPRIT is extended and implemented by constructing a so-called polar-spatio-temporal signature matrix, of which any principal eigenvalue and corresponding eigenvector embody respectively the temporal phase factor and scaled spatial manifold vector shared by the same signal and by associating them unambiguous frequencies, 2-D DOAs, polarizations can be obtained respectively.