极化敏感阵列抗干扰数目上界研究OA

In order to solve the problem of the upper bound of anti-interference number for polarization sensitive array,the upper bound of the anti-interference number is formulated to the maximum number of linearly independent steering vectors.From the per-spective of Khatri-Rao product,the deterministic and general conditions for the linearly independent steering vectors are provided.For the N-element orthogonal dipole uniform linear arrays,it is proved that the sufficient and necessary condition for the steering vectors to be linearly independent is the number of signals K≤N.When no more than two signals have the same incident angles,it is proved that the sufficient and necessary condition for the steering vectors to be linearly independent with probability 1 is the number of signals K≤2N.Theoretical results show that when the number of completely polarized mainlobe interferences does not exceed 1,the polarization sensitive array can suppress at most 2N-1 interferences.While there are 2 completely polarized main-lobe interferences or 1 partially polarized mainlobe interference,the polarization sensitive array can not completely suppress inter-ferences.Simulation experiments validate the correctness of the theoretical conclusions too.The research provides theoretical guid-ance for the application of polarization sensitive arrays in radar,communication,navigation,and electronic countermeasures.