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为提高合成孔径激光雷达(SAL)的分辨率,从激光脉冲调制与脉冲重复频率(PRF)的矛盾入手,提出了一种沿方位向放置多个望远镜接收的系统设计方法,利用空间自由度解决由于较低PRF带来的方位模糊问题。分析了SAL系统由于平台连续运动的影响(表现为多普勒频移项),提出了多普勒平移补偿方法。通过仿真实验验证了本文所提系统设计的正确性,和所给方法的有效性,有效地解决了方位模糊问题。
In order to improve the resolution of synthetic aperture lidar (SAL), from the contradiction between laser pulse modulation and pulse repetition frequency (PRF), a system design method for receiving multiple telescopes along the azimuth is proposed. The spatial DOF is used to solve the problem. Obfuscation of orientation due to lower PRF. The effect of the continuous motion of the platform (represented by Doppler shift term) in the SAL system is analyzed. A Doppler shift compensation method is proposed. Through the simulation experiments, the correctness of the system design and the effectiveness of the proposed method are verified, and the azimuth ambiguity problem is effectively solved.