Synthetic Bandwidth Method for SAR in Deramp-on-Receive Mode

摘要：

As current airborne SAR systems aiming to produce SAR imagery at resolution less than 0.1m,attaining ultrawideband signal become a difficult problem.Synthetic bandwidth based on frequency-stepped chirps is an available method to achieve this type of ultrawideband signal,the advantage of which is the reduction of the instantaneous bandwidth and sampling rate requirements of the radar system. This paper analyzed the synthetic bandwidth method for derampon-receive signal in detail. To evaluate the capability of this method,simulations were carried out.For the lack of real deramped frequency-stepped chirps SAR data,we proposed an approach to transform the common non-deramped total bandwidth SAR data to deramped frequency-stepped chirps data,then process the transformed data with synthetic bandwidth method,and the imaging results show the validity of the proposed method.

关键词： SAR ultra-high resolution frequency-stepped chirp synthetic bandwidth

作者: Yang Jungang Huang Xiaotao An Daoxiang Zhou Zhimin

作者单位: College of Electronic Science and Engineering National University of Defense Technology (NUDT) Changsha,China

会议类型: 国际会议

会议名称: 2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar(第二届亚太合成孔径雷达会议)

会议地点: 西安

会议语种:英文

页码: 439-442

在线出版日期: 2009-10-26（万方平台首次上网日期，不代表论文的发表时间）