轨道目标ISAR中频回波模拟技术研究

该文目的是研究一种空间目标宽带ISAR雷达回波的模拟实现方法，为空间目标探测雷达的研制及空间目标特性的研究提供信号来源。该文首先深入研究了空间目标的运动特性，给出了弹道目标轨道方程的计算方法，由目标的轨迹可以确定任意时刻目标的姿态，从而得到目标的散射中心分布。然后分析了目标在大时宽带宽雷达照射下的回波信号特性，结合目标轨道计算提供的散射中心分布信息，模拟出目标的中频回波信号。最后，提出了一种轨道目标ISAR雷达回波模拟器的实现方案，给出了实验结果。在实际应用中证明，用该方法模拟空间目标宽带雷达回波完全可行。

Orbit Object ISAR Echo Signal Simulation

The aim of this article is to study a method to simulate the ISAR radar echo of space objects, thus providing signal and data for the development of Space Target Detection Radar and the research of the characteristics of space targets. Firstly, the space object' s moving characteristics are researched, and a way to calculate the orbit of ballistic object is given, by which the target' s gesture can be fixed at any time, and the scatters' distribution of the target can be got. Then, the radar echo characteristics are researched under the irradiation of long - pulse - wide - band radar signal. With the distribution information of scatters provided by the orbit computation, the IF echo is simulated. At last, a method to realize the ISAR echo signal simulator based on orbit object is proposed, and the experimentation result is presented. Proved in the application, it's feasible to simulate the wide - band radar echo of space targets by this means.