机载SAR变采样开启波门技术研究  

A Study on Variable Sampling Wave Gate Technology of Airborne SAR

作　　者：贺彩琴[1] 李敏慧[1] 朱力[1] 

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《现代雷达》2016年第3期51-53,共3页Modern Radar

摘　　要：对于方位大斜视角、宽观测带、高分辨率机载合成孔径雷达(SAR)系统,由于距离徙动量巨大,若采用固定波门采样技术,将导致无效数据量过大。针对这一技术问题,提出一种在雷达回波窗不跨脉冲重复周期的情形下连续变采样开启波门技术方法,根据距离徙动变化曲线,连续变化采样开启波门位置,以此对距离徙动进行校正,可解决固定采样开启波门存在的无效数据量过大的技术问题。通过SAR系统仿真、机载飞行试验获得的高质量成像结果,验证了此方法的有效性。For large squint azimuth and high resolution wide swath imaging airborne synthetic aperture radar （ SAR）, there is much useless data caused by range cell migration using solid sampling wave gate. A method of using variable sampling wave gate to deal with the problem is introduced in this paper. Under the condition of none range ambiguity,the cell migration is calibrated by changing sampling wave gate. The effectiveness of this method is testified by the results from the SAR simulation and flight test from high resolution profiles.

关 键 词：变采样开启波门 距离徙动 机载合成孔径雷达 

分 类 号：TN957.52[电子电信—信号与信息处理]