空军工程大学学报（自然科学版）2012，Vol.13Issue(4)：36-40,5.DOI:10.3969/j.issn.1009-3516.2012.04.008
非均匀转动目标ISAR成像及横向定标
ISAR Imaging and Cross Scaling for Non-uniform Rotating Targets
摘要
Abstract
The use of traditional algorithms cannot obtain a well - focused and cross scaled ISAR image for non - u-niform rotating targets. To solve this problem, a method is proposed to estimate the rotating parameters when targets undergo non - uniform rotation. Firstly, the ratio between the angular acceleration and the angular velocity is estimated by one dimension search. By non - uniformly sampling the raw profile sequence according to the estimated ratio, the phase error caused by angular acceleration can be compensated and a focused ISAR image can be obtained. Based on the rule of image quality, the rotating velocity of the resample signal can be estimated by another one dimension search. Furthermore, the scalar of cross - range can be obtained. A focused, cross - range scaled ISAR imaging can be obtained for non - uniform rotating targets based the proposed algorithm. Experimentations with the simulated and measured ISAR data demonstrate the effectiveness of the algorithm.关键词
ISAR/非均匀转动/横向定标/图像对比度Key words
ISAR/ non - uniform rotation/ cross scaling/ image contrast.分类
电子信息工程引用本文复制引用
贺思三,龙戈农,赵会宁,冯存前..非均匀转动目标ISAR成像及横向定标[J].空军工程大学学报（自然科学版）,2012,13(4):36-40,5.基金项目
陕西省自然科学基金资助项目(2010JQ8007) （2010JQ8007）
