摘  要：小波变换具有表征信号局部特征的能力，适于分析信号中的瞬态和奇异现象，并可展示其成份,所以采用小波多分辨率分析方法对激光回波弱信号进行处理。利用这种方法,可以有效消除噪声,提取有用的信号。结果证明小波多分辨率分析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。   关键词：小波变换；多分辨率分析；直接探测；回波信号；信号特征   中图分类号：TP391.77 文献标识码：A 文章编号：1672-4984（2007）04-0013-03   Application of wavelet multi-resolution analysis in echo signal processing of the laser rapid scanning CHEN Jin-ling1，2， XIE De-lin1， CHEN Hong-bin1， LUO Jian1，2， SHI Chuan1，2 （1.Institute of Optics and Electronics，Chinese Academy of Sciences，Chengdu 610209，China； 2.Graduate School of the Chinese Academy of Sciences，Beijing 100039，China）   Abstract: Wavelet transform has the ability of denoting local signal characteristics, so it is often use to analyze instantaneous and fantastic phenomena. In this method, noise can be eliminated and effective signals can be picked up. When applying the wavelet transform to the experiments, a satisfying result was obtained. With this method, the ability of edge detection can be greatly improved.   Key words: Wavelet transform； Multi-resolution analysis; Direct detection; Echo signal; Signal characteristics