CAJ | 학술논문

通过对逆合成孔径雷达（ISAR ）匀速平面旋转体散射中心的距离和多普勒走动分析，提出一种ISAR目标转动速度及旋转中心估计算法，并实现目标聚焦成像。该方法通过Keystone变换补偿一阶距离走动，采用匹配处理补偿一阶多普勒走动，从而实现对非合作目标的转动补偿和聚焦成像。进而，通过图像质量评价获得目标转速和等效旋转中心联合估计。结合对目标的转动估计，提出了较完整的高分辨ISAR聚焦成像及图像尺度标定的处理流程，并分析了其应用条件。最后，通过实测飞机目标数据验证了该方法的有效性。
통과대역합성공경뢰체（ISAR ）균속평면선전체산사중심적거리화다보륵주동분석，제출일충ISAR목표전동속도급선전중심고계산법，병실현목표취초성상。해방법통과Keystone변환보상일계거리주동，채용필배처리보상일계다보륵주동，종이실현대비합작목표적전동보상화취초성상。진이，통과도상질량평개획득목표전속화등효선전중심연합고계。결합대목표적전동고계，제출료교완정적고분변ISAR취초성상급도상척도표정적처리류정，병분석료기응용조건。최후，통과실측비궤목표수거험증료해방법적유효성。
For inverse synthetic aperture radar (ISAR ) imaging of uniformly planar rotating objects ,the characteristic of range walk and Doppler walk of a scattering center is analyzed .Thus ,a method is proposed for rotation estimation and compensa-tion .This method exploits Keystone transform to compensate for the first order range walk ,and exploits matched processing to com-pensate for the first order Doppler walk .With the above compensation ,the rotational center and velocity of a non-cooperative object may be searched .Furthermore ,a complete processing scheme is formed for very high resolution ISAR imaging of non-cooperative targets ,and the necessity for applying delicate imaging algorithms is investigated .Finally ,experiments with some measured airplane data demonstrate the effectiveness of the proposed method .