现代雷达2013，Vol.35Issue(1)：46-48,54,4.
基于最小熵的斜视SAR多普勒调频率估计
Estimation of the Doppler Frequency Modulation Ratio Based on Minimum Entropy Criteria for Highly Squinted SAR
摘要
Abstract
Doppler frequency modulation ratio is a key parameter for high resolution SAR imaging. The map drift algorithm, which is usually applied in airborne SAR imaging processing, is based on the model that there are echoes of only one point. The hypothesis heavily disaccords with the actual situation and is not applied to the parameter estimation for low contrast region, even sometimes fails. A novel Doppler frequency modulation ratio estimation algorithm based on the minimum entropy criteria is presented in this paper. The algorithm is not based on any echo model, which completes minimum entropy deconvolution by searching method. The outstanding merit of the algorithm is its high robustness and not relied on any echo data, especially for the scenes that there are not some obvious features. The imaging results of live data demonstrate the feasibility and validity of the method proposed in this paper.关键词
高分辨合成孔径雷达/多普勒调频率/子孔径相关/最小熵Key words
high resolution SAR/ Doppler frequency modulation ratio/ map drift/ minimum entropy分类
信息技术与安全科学引用本文复制引用
肖靖,胡学成,章宏,陈知明..基于最小熵的斜视SAR多普勒调频率估计[J].现代雷达,2013,35(1):46-48,54,4.
