CAJ | 학술논문

包络对齐是逆合成孔径雷达（ISAR）平动补偿的关键技术之一。本文通过分析目标平动和转动对距离像的影响，建立了距离单元统计模型，并提出了一种基于该统计模型的包络对齐方法。该方法通过两个步骤完成包络对齐：利用目标回波数据提取各距离单元统计模型的参数；搜索使各距离单元的联合概率密度函数取得最大值的距离偏移量进行包络对齐。分析表明包络相关法是该方法的一个特例。仿真实验对本文提出方法的有效性进行了验证。
포락대제시역합성공경뢰체（ISAR）평동보상적관건기술지일。본문통과분석목표평동화전동대거리상적영향，건립료거리단원통계모형，병제출료일충기우해통계모형적포락대제방법。해방법통과량개보취완성포락대제：이용목표회파수거제취각거리단원통계모형적삼수；수색사각거리단원적연합개솔밀도함수취득최대치적거리편이량진행포락대제。분석표명포락상관법시해방법적일개특례。방진실험대본문제출방법적유효성진행료험증。
Envelope alignment is one of the key technologies in inverse synthetic aperture radar （ISAR） transla-tional motion compensation. Through analyzing effect of target translational motion and rotation in range profile, a range cells statistical model （RCSM） is built; and a new envelope alignment method was proposed based on the RCSM. The envelope alignment can be accomplished in two steps ： firstly extract parameters of each range cell sta- tistic model according to target echo data; then search and use the range displacement which let the joint probability density function obtains its maximum value to carry out envelope alignment to the range displacement. Analysis re- sults show that envelope correlation method is a special example of this method. Effectiveness of the method is veri- fied by the simulation experiments.