宽带循环平稳信号二维DOA和极化参数联合估计算法

Algorithm for Jointly Estimating 2-D Direction-of-Arrival and Polarization of Wideband Cyclostationary Sources

基于圆形紧凑矢量传感器阵列,提出一种新的宽带信号二维波达方向(DOA)和极化参数联合估计算法。充分利用了信号的循环平稳特性以及均匀圆阵的阵列流形,对宽带信号和窄带信号均有效,而且能利用信号在极化域的差异来定位空间上靠的很近的信号。在估计过程中不需谱峰搜索,二维DOA以及极化参数自动配对,具有很好的实用性。能抑制宽带干扰和加性噪声的影响。仿真结果验证了该方法的有效性。

Based on a uniform circular array （UCA） of trimmed vector sensors, a new algorithm was proposed for the two-dimension （2-D） direction-of-arrival and polarization estimation of wideband cyclostationary sources. By sufficiently utilizing the cyclostationarity of the signals and array manifold of UCA, the proposed method could be employed to both wideband and narrowband cases, and could distinguish the closely.spaced sources by exploiting their polarization diversity. Besides, the proposed algorithm has the capability of suppressing additive noise and wideband interference, and the 2-D DOA and polarization can be automatically paired without spectral peak searching. Simulations illustrate the efficacy of the algorithm.