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提出了用高通滤波技术实现激光水下传输后向散射消除,基于频域对激光水下传输后向散射进行了深入的理论研究。研究主要分四步完成:首先分析了散射特别是多次散射对激光水下传输透过率的影响;其次建立了激光水下传输后向散射研究的物理模型并推导出后向散射随时间变化规律;然后利用傅里叶变换研究出后向散射信号的频域特性;最后通过代入典型数值的计算,证明了用高通滤波法实现激光雷达的后向散射消除是完全可行的。
Proposed using high-pass filter technology to achieve laser underwater transmission backscatter elimination, based on the frequency domain laser underwater transmission backscattering in-depth theoretical study. The research is mainly completed in four steps: First, the influence of scattering, especially multiple scattering, on laser underwater transmission transmittance is analyzed. Secondly, the physical model of laser underwater transmission backscattering is established and the backscattering is deduced with time Then the frequency domain properties of the backscattered signal are studied by using Fourier transform. Finally, by substituting into the typical numerical calculation, it is proved that it is feasible to eliminate the backscattering of the lidar by the high-pass filter.