基于小波多分辨率分析的激光雷达弱信号处理

Faint signal processing of lidar based on wavelet multi-resolution analysis

摘要: 提出了小波多分辨率分析方法对激光回波弱信号进行处理,从而突破了传统滤波处理方法,对于激光回波信号处理十分有效,提高了信号分析的准确性。结果表明,采用一台TEA CO2激光器进行实验,当采样速率达到120MHz时,对于S/N≥1.2的含噪信号能有效地去掉噪声,准确可靠地提取出有效信号,并保持了原信号的特征。采用该数字处理方法可以大幅度提高目前激光雷达的工作能力。

Abstract: A wavelet multi-resolution analytical method (WMRA) was used to analyze those echosignals.By the measure,for those signals with S/N above 1.2,the noise can be eliminated,and effective signals can be picked up.When applying the WMRA to a TEA CO2 DIAL lidar,a satisfying result was obtained.When using this method,the ability of laser radar can be greatly improved.