在前视条件下,合成孔径雷达(SAR)成像技术因距离-方位耦合成像质量急剧下降。对此,文中提出一种单脉冲成像方法,该方法将距离高分辨技术与单脉冲测角技术相结合,利用脉冲压缩实现距离维高分辨,并用单脉冲测角技术实现不同距离单元强散射点的方位维高分辨,能有效弥补SAR成像技术在前视成像领域的不足。相对实波束成像,单脉冲成像能有效改善图像质量,仿真实验验证了这一结论。

In the state of forward-looking, the quality of SAR image descends rapidly because of the coupling of range and azimuth. A mono-pulse imaging algorithm was raised to solve the problem above, the algorithm combine high range resolution technology with monopulse angle measurement technology, using pulse compress to achieve range high resolution, and using monopulse angle measurement to achieve azimuth high resolution of intense scatter which distribute in different range cell. The method in this paper can make up the disadvantage of SAR in forward-looking state. Comparing to real beam imaging, monopulse can improve the quality of image, simulation proved it.