摘要
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。
The creative high-pass filter technology to eliminate the light-wave＇s back-scattering underwater was put forward. To validate this technology, the back-scattering＇s mechanism based on frequency domain was studied. And this study consisted of four steps. Firstly, the multiple-scattering＇s effect on transmissing was analyzed Secondly, the back-scattering＇ s physical model of laser＇s transmission underwater was established, and the back-scattering＇s relation with time was gained. Thirdly, the back-scattering＇s frequency characteristic and some useful equations were attained. Finally, the actual values were added to these equations to calculate their actual band-widths, and the result testifies that high-pass filter can eliminate the back-scattering＇s effect obviously
出处
《红外与激光工程》
EI
CSCD
北大核心
2006年第4期441-444,共4页
Infrared and Laser Engineering
基金
总装跨行业基金资助项目(51403020605BQ0215)
南京理工大学科研发展基金资助项目(KYF05025)
关键词
激光水下传输
多次散射
透过率
高通滤波
Laser＇s underwater transmission
Multiple-scattering
Transmissivity
High-pass filter
