CAJ | 학술논문

该文针对逆合成孔径雷达成像中某些含旋转部件雷达目标,其回波多普勒中心受到旋转部件微多普勒的扰动,使得对回波初相的估计和补偿精度下降,从而导致目标主体成像质量变差的问题,提出一种自适应的距离单元筛选快速最小熵相位补偿方法.该方法利用筛选得到的仅包含目标主体散射点的距离单元数据完成相位校正,既提高了相位补偿的精度,又能加快搜索效率.最后通过实测数据说明该方法的有效性.
해문침대역합성공경뢰체성상중모사함선전부건뢰체목표,기회파다보륵중심수도선전부건미다보륵적우동,사득대회파초상적고계화보상정도하강,종이도치목표주체성상질량변차적문제,제출일충자괄응적거리단원사선쾌속최소적상위보상방법.해방법이용사선득도적부포함목표주체산사점적거리단원수거완성상위교정,기제고료상위보상적정도,우능가쾌수색효솔.최후통과실측수거설명해방법적유효성.
@@@@In the Inverse Synthetic Aperture Radar (ISAR) imaging of targets with rotating parts, the Doppler centroid of the radar returns are disturbed by the micro-Doppler of the rotating parts. As a result, the phase estimation and compensation accuracy will decline and the image of the targets’ main body may be unfocused. To solve this problem, an algorithm based on adaptive range bins selection in the fast minimum entropy phase compensation is presented. By adaptively selecting range bins which only contain the returns of the main body scatterers, the disturbance from the rotating parts can be avoided and the computational efficiency is improved. The result from a set of measured data is given to verify the validity of this algorithm.