基于知识辅助的高精度SAR-GMTI目标定位技术

Technology of High Accuracy SAR-GMTI Target Location Based on Knowledge-aid

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。

Because of the long distance, the error of position estimation of ground moving target became bigger based on the method of interferential phase, which resulted in the method was very difficult to be used. The precision of velocity and position estimation was analyzed of the GMTI method based on the interferential phase. A new method was proposed based on the knowledge-aid, which made use of road detection based on the SAR image, and the accuracy of position estimation could be increased greatly. The validity of method was validated using measured data.