【摘要】 确定低分辨雷达目标横向成像的距离定标(横向距离因子),是正确获取目标横向距离像和进行雷达目标识别的一个前提。根据逆合成孔径雷达(ISAR)原理,目标横向距离因子取决于雷达波长和目标对于雷达视线(RLOS)在相干处理时间内的转角,前者可已知,但对于非合作的运动目标,后者在简单的ISAR方式下,是难以确定的。该文根据合成阵列以及干涉SAR(INSAR)的原理,利用两个水平方向放置的天线,通过对两个天线所成一维横向距离像进行比相,便可对目标进行横向定标。通过理论分析和仿真实验证明,该方法是正确和有效可行的。更多还原

【Abstract】 Cross-range scaling of low-resolution radar is very important to obtain correctly cross-range image and target classification and recognition. According to the technology of in-verse synthetic aperture radar(ISAR), the cross-range scale depends on both radar wavelength and rotating angle of target relative to radar-line-of-sight(RLOS) during the coherent accumu-lation. The former is known while the latter is difficult to determine especially in the case of ISAR. In this paper, a new approach is proposed which is based on the principle of synthetic array and interferometric inverse synthetic aperture. The phase difference of some scatters between two instant cross-range images by two antennae which are placed on one level, can be calculated. The proposed algorithm is applied to the emulational data of two antennae. The theoretical analysis and the processing results show that the proposed method is correct and effective.更多还原