摘要
合成孔径激光成像雷达中啁啾激光光源的非线性会严重影响距离向的成像聚焦。基于参考通道非线性测量和相移计算进行目标通道啁啾非线性补偿的概念,提出了一种对目标物点反射信号逐一滤波和校正的方法。建立了该方法从外差探测到距离向成像的一般性数学流程。以星载合成孔径激光成像雷达为模型,进行了计算机仿真,研究了滤波器宽度、非线性大小对距离向压缩脉宽的影响,通过分析得到了合适的滤波器宽度,验证了本方法的可行性。
The nonlinear chirp of laser reduces the range resolution of synthetic aperture imaging ladar. Based on the nonlinear chirp measurement in reference channel and phase-shift algorithm, a compensation method is proposed, which filters and proofreads the target backwave one by one, and mathematical flow of this method is established. The simulation of the airborne synthetic aperture imaging ladar model validates the feasibility. The effects of width of the scan filter and nonlinear chirp are discussed. The conclusion of adequate width of the scan filter is given.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2009年第1期47-54,共8页
Acta Optica Sinica
