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随着作用距离的增大,基于干涉相位检测运动目标并定位位置的方法的定位误差会越来越大,这成为限制合成孔径雷达-地面运动目标检测(SAR-GMTI)模式在实战中应用的瓶颈问题。文中分析推导了基于干涉相位检测运动目标的测速精度和定位精度,提出了基于知识辅助的高精度SAR-GMTI目标定位方法,利用基于SAR图像的道路检测,可以有效提高运动目标的定位精度,实测数据处理结果验证了方法的有效性。
With the increase of the working distance, the positioning error of the moving target based on the interferometric phase to detect the moving target and locate the position will become larger and larger, which becomes a limitation to the application of the SAR-GMTI mode in actual combat Bottleneck problem. In this paper, the velocity accuracy and the positioning accuracy of the moving target based on the interferometric phase are analyzed and derived. A high precision SAR-GMTI target location method based on knowledge aiding is proposed. Using the road detection based on the SAR image, the positioning accuracy of the moving target can be effectively improved. Data processing results verify the effectiveness of the method.