激光技术2016，Vol.40Issue(2)：157-160,4.DOI:10.7510/jgjs.issn.1001-3806.2016.02.002
基于小波变换的水下声信号激光探测应用
Application of laser detection of underwater acoustic signals based on wavelet transform
摘要
Abstract
In order to study underwater acoustic signals by laser detection and analyze the characteristic of time frequency distribution of underwater laser interference detection signals , the regularity of wavelet ridges distribution of laser interference signal was discovered .According to this regularity , a method for estimating the instantaneous frequency of underwater acoustic signal was put forward based on wavelet ridges .Detection experiments of underwater acoustic signal with stable-frequency and linearly-modulated frequency were both carried out .The results show that , in the detection experiment of underwater acoustic signal with frequency change rate of 16kHz/s, the fitness result of frequency change rate is 16.05kHz/s after wavelet ridges computation .The results prove this method is validated .关键词
激光技术/小波变换/小波脊/激光干涉/水下声信号Key words
laser technique/wavelet transform/wavelet ridge/laser interference/underwater acoustic signal分类
信息技术与安全科学引用本文复制引用
李志敏,黄文,郝盼超..基于小波变换的水下声信号激光探测应用[J].激光技术,2016,40(2):157-160,4.基金项目
国家自然科学基金资助项目(61101168) （61101168）
重庆市自然科学基金资助项目(CST2009BB2195) （CST2009BB2195）
