Comparison of Doppler frequency rate Estimators in Bistatic Airborne SAR and experimental results

摘要：

In recent years, the interest in bistatic synthetic aperture radar has rapidly increased and many bistatic SAR models and processing methods are presented When regarding bistatic processing, the bistatic Doppler modulation rate is even more crucial to obtain precisely focused images. In this paper, two Doppler frequency rate Estimators are analysed and compared. First, the traditional Contrast Optimization Autofocus Algorithm (COAA) is presented. The algorithm is a magnitude-based autofocus algorithm. Then, the minimum entropy energy-based Discrete Chirp Fourier Transform (MEE-DCFT) method is proposed. The MEE-DCFT is a new method by using DCFT to estimate the chirp rate. Finally, the results of two algorithms with bistatic airborne real data are presented and compared.

关键词： Bistatic SAR COAA MEE-DCFT Doppler parameter estimation Dominant scatter.

作者: Wang Yinbo Zhang Xiaoling Gong Zhenqiang Tian Zhong

作者单位: Dept.of E.E.Univer.Of Electronic Science and Technology of China Research institute of electronic technology of UESTC Chengdu,Sichuan 610054,P.R.China

会议类型: 国际会议

会议名称: 首届亚太合成孔径雷达会议(1st Asian and Pacific Conference on Synthetic Aperture Radar Proceedings)

会议地点: 安徽黄山

会议语种:英文

在线出版日期: 2007-11-05（万方平台首次上网日期，不代表论文的发表时间）