【摘要】 该文应用物理光学法仿真出平面波以任意角度、不同频率入射时某型导弹的电磁散射回波矩阵,并利用快速傅立叶变换成像处理算法得出目标的像。导弹目标利用部件分解法进行了近似,并引进了散射矩阵的概念而简化了导弹目标回波相关数值计算复杂度,从而提高逆合成孔径雷达成像(ISAR)的实时性。文中运用信号处理相关理论对平面波在不同的入射角下逆合成孔径雷达对导弹目标所成的像进行了分析,所成像能精确地反映出目标地镜像散射区域及目标的旋转情况。此仿真结果表明物理光学法能够简单有效地计算出导弹目标的散射回波并对其进行逆合成孔径雷达成像。更多还原

【Abstract】 In this paper,physical optical(PO) method is introduced and applied to calculate the echo data from a missile illuminated by plane waves with arbitrary aspects and different frequencies for inverse synthetic aperture radar(ISAR) imaging.The missile is approximated by component disassembly method(CMD) and the concept of scattering matrix is introduced to simplify the complexity of numerical calculation.Generated images of several incidence angles are analyzed by signal processing theory and can precisely represent the mirror scattering region and the rotation of the target.The results of the simulation indicate that PO method is simple and effective to calculate the radar echo of a missile for ISAR imaging.更多还原