逆合成孔径成像激光雷达系统设计

微波波段逆合成孔径雷达的成像分辨率受到发射信号带宽的限制,在对远距离目标、微小目标成像或提取目标精细微动特征时已不能提供足够高的距离分辨率.为解决这一问题,提出一种新体制雷达--逆合成孔径成像激光雷达,将逆合成孔径技术应用于激光波段,利用激光信号的极大带宽和极短波长实现对运动目标的超高分辨实时成像.分析了逆合成孔径成像激光雷达的高分辨原理,并结合激光信号和运动目标的特点,给出了雷达系统的初步设计方案.仿真实验证明:与利用微波信号成像的逆合成孔径雷达相比,逆合成孔径成像激光雷达能够实现对运动目标更快速、更高分辨的成像.

The System Design of Inverse Synthetic Aperture Imaging LADAR

The range resolution of inverse synthetic aperture radar (ISAR) is limited by the bandwidth of signal. Therefore, ISAR cannot supply high enough imaging resolution for long distance targets, small targets, and so on. A new radar system which is called inverse synthetic aperture imaging laser radar (ISAIL) is proposed in this paper. The use of ISAIL can realize real time and high resolution imaging for moving target with the laser signal''s large bandwidth and short wavelength. In this paper, the imaging theory of ISAIL is analyzed, the characters of laser signal and moving target are researched, and the system design project is proposed. Simulation shows that the images achieved by this ISAIL are of higher quality and within shorter time than those achieved by ISAR.