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逆合成孔径成像激光雷达是成像雷达体制的创新和拓展,是逆合成孔径技术和激光雷达技术的创造性结合,以其理论上优异的成像性能和在军事、民用领域的应用前景引起了人们的关注。结合国外典型的逆合成孔径成像激光雷达系统,介绍了该技术的研究进展和现状,理论上分析了激光波段逆合成孔径成像技术相比于微波波段的优势和瓶颈,该技术具有方位向分辨率高、相干积累时间短等优点,但其较大的多普勒频移致使运动补偿相位校正十分困难,讨论了激光雷达逆合成孔径成像技术发展面临的关键问题,诸如激光光源频率稳定性需求、相干探测条件、运动补偿和大气传输补偿等。为进一步对激光雷达逆合成孔径成像技术进行深入理论和实验研究打下了基础。
Inverse synthetic aperture imaging laser radar is the innovation and development of imaging radar system. It is the creative combination of inverse synthetic aperture and laser radar technology, and attracts people’s attention with its theoretically excellent imaging performance and its application prospects in military and civil fields . The research progress and current situation of this technique are introduced with the typical inverse synthetic aperture imaging LIDAR system abroad. The advantages and bottlenecks of laser band inverse synthetic aperture imaging technology compared with microwave band are analyzed theoretically. The technique has the advantages of azimuth resolution However, the large Doppler frequency shift makes the phase compensation of motion compensation very difficult. The key issues in the development of inverse synthetic aperture imaging (LIDAR) laser are discussed, such as the requirement of the frequency stability of the laser light source, Coherent detection conditions, motion compensation and atmospheric transmission compensation. This laid the foundation for further theoretical and experimental research on inverse synthetic aperture imaging of lidar.