中文摘要：

由于共形载体曲率的影响,共形阵列天线中各阵元单元方向图具有不同的指向,使得共形阵列天线具有了多极化特性（Polarization Diversity）,为了描述共形阵列天线的多极化特性,通常在共形阵列天线的快拍数据模型中引入阵列入射信号的极化参数,因此共形阵列天线的DOA（Direction-Of-Arrival）估计需要与阵列入射信号极化参数联合估计.本文提出了一种盲极化DOA估计算法,通过在锥面共形阵列天线中设置三对特殊子阵,利用ESPRIT（Estimationof Signal Parameters via Rotational Invariance Techniques）算法,将入射信号极化参数与二维角参数去耦合,在入射信号极化参数未知条件下实现了高分辨DOA估计,并对估计性能进行了理论分析与推导,给出了参数估计的CRB（Cramer-RaoBound）,通过Monte Carlo仿真实验验证了DOA估计算法的有效性.

英文摘要：

The pattern of every element in conformal array has a different direction because of the curvature of conformal carrier,which results in polarization diversity of conformal array antenna.In order to describe the polarization diversity of conformal array antenna,polarization parameters of incident signals are contained in observations.Consequently it is usually required that the polarization parameters and DOA（Direction-Of-Arrival） of incident sources are jointly estimated.A blind DOA estimation method with respect to polarization diversity is proposed on the basis of ESPRIT （Estimation of Signal Parameters via Rotational Invariance Techniques） algorithm for conical confonnal array antenna,in which three pairs of special subarrays are designed.Azimuth and ele- vation angles of incident sources are found without knowing the polarization parameters by decoupling them. Then the CRB （Cramer-Rao Bound） of this method is derived and the validity of this algorithm is confirmed by Monte Carlo computer simulations.