摘要
利用一种水声信道统计不变特征(波导不变量)实现被动探测。采用双阵元,分别对每一个阵元接收的宽带噪声信号进行LOFAR分析,对LOFAR图利用Hough变换等图像处理方法进行参数估计,得到波导不变量和曲线(文中讨论抛物线)参数估计值,进而运用几何关系估计出运动目标的航向角、速度和距离信息。利用Matlab仿真验证了该方法的正确性。
The passive detection is realized by using a statistical invariant feature of underwater acoustic channel （wa- veguide invariant）. The proposed method needs two sensors at least to calculate the motion parameters. LOFARgrams analysis is made for broadband noise signals which are respectively received by the two sensors. To get the estimation values of wavegnide invariant and parameters of curve, HOUGH conversion is used for parameter estimation of LO- FARgrams. Then the moving target＇s angle, distance and speed are estimated according to geometrical relationship. The method has been employed to process the LOFARgrams obtained from Acoustic Toolbox simulation, and the estimated results of target parameters show the validity of the method.
出处
《声学技术》
CSCD
北大核心
2015年第2期139-142,共4页
Technical Acoustics
基金
国家自然科学基金(11274091
61302124
11274092)
国家海洋局南海维权技术与应用重点实验室2013年度开放基金(1306)
河海大学中央高校基金项目(2011B11014
2013B18514)
淮安河海研究生院开放基金资助项目
关键词
被动探测
波导不变量
参数估计
声学工具箱
passive detection
waveguide invariant
parameter estimation
Acoustic Toolbox
