CAJ | 학술논문

针对双基地逆合成孔径雷达(ISAR)对空间目标单次观测时间有限,不容易获得长时间多视角观测下的回波数据,提出了利用空间目标运动的轨道重访特性,对多次观测数据进行融合成像。该方法给出了多圈次观测图像融合的原理,并通过后向投影算法(Back Proj ection,BP)对回波相位补偿后的数据进行相干融合。仿真结果表明,该方法能有效抵消噪声对成像的影响,得到高质量的 ISAR二维像。
침대쌍기지역합성공경뢰체(ISAR)대공간목표단차관측시간유한,불용역획득장시간다시각관측하적회파수거,제출료이용공간목표운동적궤도중방특성,대다차관측수거진행융합성상。해방법급출료다권차관측도상융합적원리,병통과후향투영산법(Back Proj ection,BP)대회파상위보상후적수거진행상간융합。방진결과표명,해방법능유효저소조성대성상적영향,득도고질량적 ISAR이유상。
The time of single observation of space target of bistatic ISAR is limited,and it is hard to get a long time multi-angle observations echo data.An image fusion method of multipass observation data was proposed. By taking advantage of the orbit revisit character of space target,the principle of multipass observation image fu-sion was presented.And the echo data after phase compensation was coherent integrated through back proj ection algorithm.Finally,a single-scatter and multi-scatters model simulation experiment was carried out,and simula-tion results showed that the proposed method could offset the influence of noise and get high quality image.