Feature Extraction of Acoustic/Seismic Signal of Target  

目标声 /地震动信号特征提取(英文)

作　　者：张中民[1] 李科杰[1] 李贵涛[1] 尚雅玲[1] 

机构地区：[1]北京理工大学机电工程与控制国家级重点实验室,北京100081

出　　处：《Journal of Beijing Institute of Technology》2000年第3期312-317,共6页北京理工大学学报（英文版）

基　　金：National 9thFiveYearAdvancedResearchProject

摘　　要：A microphone and a seismic sensor always become a basic unit of UGS(unattended ground sensors) system. The mechanism of acoustic and seismic property of target and its propagation are described. The acoustic and seismic signals of targets are analyzed with time frequency distribution according to its non stationary property. Narrow band energy function (NEF) and local power spectral density (LPSD) are proposed to extract features for target identification. Experiment results show that local power spectral density indicates corresponding target clearly.声和地震动传感器通常是构成地面传感器侦察系统的基本单元 .在分析战场常见的目标噪声场和地震动场特性的基础上 ,根据目标声 /地震动信号的非平稳特性 ,对目标声 /地震动信号进行了时 频分析 .提出了窄带能量函数 (NEF)和局部功率谱密度 (LPSD)的分析方法 ,有效地从目标声 /地震动信号时

关 键 词：time  frequency analysis narrow  band energy function (NEF) local power spectral density(LPSD) 

分 类 号：E933[军事—军事装备学]