A Polarimetric Detector Based on an Irregular Array Structure.

If the pointing directions of antenna elements are inconsistent, the received signal of each sensor will vary due to the polarization effect, and this will influence the target detection performance. To analyze this problem, we establish an irregular array structure and give a signal model for this structure. Then we propose a polarimetric detector based on two-step GLRT in Gaussian clutter background. By conducting experiments based on simulated clutter data, we prove that the proposed fully adaptive detector has constant false alarm rate (CFAR) property, and the detector has a better performance for low-speed target detection compared with regular array structures.