海上舰船目标HRRP特性仿真

系统地介绍了海上舰船目标高频仿真及雷达成像的完整解决方案。对海上舰船进行高精度三维几何建模，采用步进频率信号雷达波照射，基于物理光学(physical optics， PO)双次反弹的高频方法结合增量长度绕射系数(incremental length diffraction coefficients， ILDC)理论计算了复合目标的宽带后向散射场。在频域对回波数据作离散傅里叶逆变换，得到宽带信号的时域响应，从而得到高分辨率距离像(high resolution range profiles， HRRP)和二维聚束合成孔径雷达(synthetic aperture radar， SAR)成像。在给出的算例中，借助射线理论分析了海上舰船目标的距离像特性及其成像机理，验证了仿真结果的准确性和有效性。

Simulation of HRRP characteristics for maritime ship targets

A complete solution of high-frequency simulation and radar imaging for the maritime ship target is proposed. The high-precision three-dimensional geometric modeling of the maritime ship is performed, and the broadband backscattered field of the combined model is obtained by a high-frequency method based on physical optics (PO) with double bounce and incremental length diffraction coefficients (ILDC) theory, using a stepped frequency waveform. By performing an inverse discrete Fourier transform on the backscattered field data in the frequency domain, the time domain response is provided for the wide-band signal. Accordingly, the high resolution range profile (HRRP) and 2-D spotlight SAR image are obtained. Range characteristics and imaging mechanism are analyzed by means of the ray  theory in several examples, which may verify the accuracy and effectiveness of the simulation results.