多基站ISAR三维非平稳转动转台目标成像

摘要

在多基站ISAR三维转动转台目标成像模型的基础上给出了多基站ISAR三维非平稳转动目标转台成像算法.基于Wigner-Ville时频分析方法,通过建立在多基站ISAR三维转动转台目标成像模型基础上的距离向投影方程组和方位向多普勒方程组的联合求解,获得了三维非平稳转动转台目标散射点位置和运动参数的估计,同时对系统的成像约束进行了分析.仿真实验验证了多基站ISAR三维非平稳转动转台目标的成像.%In this paper, the 3-dimensional turntable imaging of multi-static ISAR non-stationary rotating target is discusscd based on the multi-static ISAR 3-dimensional turntable model.The Wigner-Ville timefrequency distribution is used to identify the interval used for imaging and to generate instant-Doppler images of non-stationary target.The positions and movement parameters of target scatters are obtained accurately via solving the range direction projcction equations and azimuth Doppler equations deduced by multi-static ISAR 3-dimensional turntable model.Furthermore, the multi-static ISAR 3-dimensional turntable imaging constraints are analyzed.The multi-static ISAR 3-dimensional turntable model and imaging method are verified by simulation experiments.