Fast Estimation of Frequency and 2-D DOAs for Cylindrical Conformal Array Antenna Using State-Space and Propagator Method
Fast Estimation of Frequency and 2-D DOAs for Cylindrical Conformal Array Antenna Using State-Space and Propagator Method
复制标题
DOI：
10.2528/pier12121114
复制
发表时间：
2013
影响因子：
6.7
通讯作者：
Weijian Si;L. Wan;Lutao Liu;Zuoxi Tian
中科院分区：
文献类型：
--
作者：
Weijian Si;L. Wan;Lutao Liu;Zuoxi Tian
共形阵列天线中各阵元的方向图由于共形载体的曲率而具有不同的方向性，从而导致共形阵列天线的极化分集。为了描述共形阵列天线的极化分集特性，在快拍数据模型中考虑了入射信号的极化参数。这就要求对入射信号的极化参数和波达方向（DOA）同时进行估计。针对圆柱共形阵列天线，提出了一种综合频率和方位估计方法。通过构造状态空间矩阵，得到信号源的频率估计。通过对圆柱形载体上阵元的合理配置沿着结合传播算子法（PM）对信号参数的估计，实现了波达方向和极化参数的解耦。提出了一种基于插值技术的多源信号频率和DOA参数配对方法，并在此基础上提出了一种快速的频率-DOA估计算法。仿真实验结果证明了该方法的有效性。
The pattern of each element in conformal array has a difierent direction for the curvature of conformal carrier, which results in polarization diversity of conformal array antenna. Polarization parameters of incident signals are considered in snapshot data model in order to describe the polarization diversity of conformal array antenna. It is required that the polarization parameters and direction of arrival (DOA) of incident signals are estimated together. An integrated frequency and DOA estimation method is proposed in this paper for cylindrical conformal array antenna. The frequency estimation of signal source is obtained by constructing state-space matrix. Through well-designed conflguration of elements on cylindrical carriers along with estimation of signal parameters via propagator method (PM), the decoupling scheme for DOA and polarization parameters is implemented. A novel parameter pairing method for frequency and DOA of multiple sources utilizing the interpolation technique is given, based on which the fast frequency-DOA estimation algorithm is developed. Efiectiveness of the proposed method is demonstrated by simulation experimental results.