摘要
运动补偿是ISAR成像中的关键技术,通常包括包络对齐和相位补偿,而包络对齐是相位补偿的基础。现有包络对齐方法较多,在无法直观判断包络对齐效果的情况下,需要进行定量评估,以选择最优的对齐方法用于ISAR成像。提出基于距离单元方差的包络对齐评估方法:以对齐后各距离单元方差的加权和作为评估指标,对包络对齐结果直接进行评估。进行了相应的仿真实验,结果证明了该评估方法的有效性。
Motion compensation, which usually includes range alignment and phase compensation, plays a key role in ISAR imaging. As the basis of phase compensation, range alignment has been investigated comprehensively and multifarious range alignment methods have been proposed. When the impact of range alignment cannot be judged directly, it is necessary to choose the optimal range alignment method. An evaluation method based on variance of range bins is proposed. It makes use of weighted sum of range bins＇ variance from range alignment to evaluate impact of range alignment method directly. The results of simulation verify the effectiveness of the method.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2007年第3期56-60,共5页
Journal of National University of Defense Technology
基金
国家自然科学基金资助项目(60672033)
新世纪优秀人才支持计划资助项目(NCET-04-0997)
