Abstract:

The system unfavourable factors that affect the performance of moving targets location can be examined through channel imbalance and antenna array misalignment etc. A concept called error equivalent baseline (EEB) is introduced to describe the influence of these factors and a novel method of moving targets location for the scan-ground moving target indication (SCAN-GMTI) system is developed. The proposed method involves measuring the clutter suppression sharpness ratio (CSSR) corresponding to the potential EEBs, determining the optimal EEB, and locating the moving targets. The key procedure of estimating the optimal EEB that maximizes the CSSR virtually provides a good fit for the error characteristic of the measured data. Therefore, the location performance of the obtained optimal EEB is superior to that of the nominal baseline. The processing results of measured data validate the effectiveness of the proposed method.