| 基于单矢量水听器四种方位估计方法 |
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| 引用本文： | 姚直象,惠俊英,殷敬伟,杨娟.基于单矢量水听器四种方位估计方法[J].海洋工程,2006,24(1):122-127131. |
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| 作者姓名： | 姚直象 惠俊英 殷敬伟 杨娟 |
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| 作者单位： | 1. 哈尔滨工程大学,水声工程学院,黑龙江,哈尔滨,150001;海军工程大学,电子工程学院,湖北,武汉,430033
2. 哈尔滨工程大学,水声工程学院,黑龙江,哈尔滨,150001 |
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| 摘 要： | 单矢量水听器能同时拾取声场的声压和振速信息,可以估计目标方位。根据不同的噪声背景和信号形式,单矢量水听器有多种方位估计方法。平均声强器的处理方法能很好地抗各向同性的非相干干扰;线谱方位估计能有效检测辐射线谱信号的目标,并进行目标方位估计。当宽带信号中存在线谱相干干扰,以及线谱信号被宽带相干噪声干扰时,上述两种方法不能检测目标。为解决这个问题,新提出了直方图和加权直方图两种方法,直方图方位估计法能抗强线谱相干干扰,并能区分含线谱的多目标;加权直方图方位估计法能从宽带相干干扰中检测目标,估计目标方位。并着重介绍了后两种方法的原理,对四种方法进行了计算机仿真,并用海试结果验证了上述结论。
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| 关 键 词： | 单矢量水听器 信号处理 直方图 方位估计 平均声强器 相干干扰 |
| 文章编号： | 1005-9865（2006）01-0122-06 |
| 收稿时间： | 2004-12-13 |
| 修稿时间： | 2004-12-13 |
Four approaches to DOA estimation based on a single vector hydrophone |
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| YAO Zhi-xiang,HUI Jun-ying,YIN Jing-wei,YANG Juan.Four approaches to DOA estimation based on a single vector hydrophone[J].Ocean Engineering,2006,24(1):122-127131. |
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| Authors: | YAO Zhi-xiang HUI Jun-ying YIN Jing-wei YANG Juan |
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| Institution: | 1. College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China; 2. College of Electronic Engineering, Navy Engineering University, Wuhan 430033, China |
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| Abstract: | A single vector hydrophone can be used in DOA estimation.According to different existences of noise background and signals,there are several approaches to azimuth angle estimation based on a single vector hydrophone.Acoustic intensity averager can effectively suppress isotropic non-coherent interference.Based on line-spectra we can effectively detect the target radiating line-spectra.But the two methods cann't do well in the condition of either line-spectra coherent interference lying in broadband signal or broadband coherent interference lying in line-spectra signal.Two new approaches are put forward.One is bar graph approach which can suppress line-spectra coherent interference and identify different targets radiating line-spectra.The other is weighted bar graph approach which can detect a target in broadband coherent interference and estimate its azimuth angle.The principles of the two are introduced.Simulations of the 4 approaches based on computer are given.The result of trial in sea validates these conclusions. |
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| Keywords: | single vector hydrophone signal processing bar graph DOA estimation acoustic intensity averager coherent interference |
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