检索结果-内蒙古大学图书馆

passive source localization by two hydrophones in direct arrival zone and shadow zone

APPLIED ACOUSTICS 2025年 231卷

作者： Zheng, Kang Qin, Jixing Wu, Shuanglin Qi, Yubo Peng, Zhaohui Chinese Acad Sci State Key Lab Acoust Inst Acoust Beijing 100190 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

A broadband source localization method based on two kinds of multipath time delays using dual vertical hydrophones suitable for both direct arrival zone (DAZ) and shadow zone (SZ) in deep water is presented. We analyze the multipath time delays in the DAZ and SZ for sound source near the surface, which are related to source depth and range. Thus, source position can be estimated using these time delays. However, there is currently a problem of source position ambiguity in the previous localization methods, especially misjudgment of sound zones. Our approach addresses the above issues from two perspectives. On the one hand, two types of time delays are used for localization to avoid the ambiguous position results caused by using a single time delay. On the other hand, we use dual hydrophones to overcome the problem of misjudgment in sound zones. Four positioning results can be obtained by locating the signals received by two vertical hydrophones using time delays calculated in the DAZ and SZ, and the average of the two results with the highest similarity is the accurate source position. The simulation results and the experimental data indicate that the method has good localization performance and robustness in the both DAZ and SZ.

关键词： passive source localization Multipath time delay Dual vertical hydrophones Direct arrival zone Shadow zone

来源：评论

学校读者我要写书评

暂无评论

passive source localization using importance sampling based on TOA and FOA measurements

引用

Frontiers of Information Technology & Electronic Engineering 2017年第8期18卷 1167-1179页

作者： Rui-rui LIU Yun-long WANG Jie-xin YIN Ding WANG Ying WU National Digital Switching System Engineering & Technology Research Center Zhengzhou 450001 China

passive source localization via a maximum likelihood （ML） estimator can achieve a high accuracy but involves high calculation burdens, especially when based on time-of-arrival and frequency-of-arrival measurements for its internal nonlinearity and nonconvex nature. In this paper, we use the Pincus theorem and Monte Carlo importance sampling （MCIS） to achieve an approximate global solution to the ML problem in a computationally efficient manner. The main contribution is that we construct a probability density function （PDF） of Gaussian distribution, which is called an important function for efficient sampling, to approximate the ML estimation related to complicated distributions. The improved performance of the proposed method is at- tributed to the optimal selection of the important function and also the guaranteed convergence to a global maximum. This process greatly reduces the amount of calculation, but an initial solution estimation is required resulting from Taylor series expansion. However, the MCIS method is robust to this prior knowledge for point sampling and correction of importance weights. Simulation results show that the proposed method can achieve the Cram6r-Rao lower bound at a moderate Gaussian noise level and outper- forms the existing methods.

关键词： passive source localization Time of arrival (TOA) Frequency of arrival (FOA) Monte Carlo importance sampling(MCIS) Maximum likelihood (ML)

来源：评论

学校读者我要写书评

暂无评论

TDOA and RSSD Based Hybrid passive source localization with Unknown Transmit Power

引用

IETE JOURNAL OF RESEARCH 2020年第4期66卷 533-545页

作者： Wang, Zengfeng Zhang, Hao Lu, Tingting Liu, Xing Wei, Zhaoqiang Gulliver, T. Aaron Ludong Univ Sch Informat & Elect Engn Yantai Peoples R China Ocean Univ China Dept Elect Engn Qingdao Peoples R China Univ Victoria Dept Elect & Comp Engn Victoria BC Canada

passive source localization is an important issue as there are numerous applications including search and rescue and public safety. Hybrid passive source localization combining time difference of arrival (TDOA) and received signal strength difference (RSSD) is investigated in this paper. First, a TDOA and RSSD based linear weighted least-squares (WLS) estimator for passive source localization is presented. Second, the maximum likelihood (ML) estimator and Cramer-Rao lower bound (CRLB) for the hybrid localization scheme are derived as performance benchmarks. Numerical results are presented which demonstrate that the proposed hybrid localization method provides significantly better accuracy than using only the TDOA.

关键词： Cramer-rao lower bound (CRLB) Least-squares estimation passive source localization Received signal strength difference (RSSD) Time difference of arrival (TDOA)

来源：评论

学校读者我要写书评

暂无评论

Peak Extraction passive source localization Using a Single Hydrophone in Shallow Water

引用

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2020年第3期69卷 3412-3423页

作者： Zhang, Tongwei Han, Guangjie Guizani, Mohsen Yan, Lei Shu, Lei Qingdao Natl Lab Marine Sci & Technol Natl Deep Sea Ctr Qingdao 266237 Peoples R China Qingdao Natl Lab Marine Sci & Technol Lab Marine Geol Joint Lab Ocean Observat & Detect Qingdao 266237 Peoples R China Nanjing Agr Univ Coll Engn Nanjing 210095 Peoples R China Hohai Univ Dept Informat & Commun Syst Changzhou 213022 Peoples R China Qatar Univ Coll Engn Doha 2713 Qatar Yanshan Univ Inst Elect Engn Qinhuangdao 066044 Hebei Peoples R China Chinese Acad Sci State Key Lab Acoust Inst Acoust Beijing 100190 Peoples R China Univ Lincoln Sch Engn Lincoln LN6 7TS England

In this work, we use the acoustic ray model to study passive source localization problems using a single hydrophone for shallow water waveguides. It has been found that conventional matched field processing, which requires a multi-hydrophone array, is no longer effective. In this paper, we introduce matched feature localization to achieve passive source localization using a single hydrophone. The eigenray that contains the arrival structure is the core of the acoustic ray model;however, it is difficult to estimate the relative arrival delay of the eigenray for passive localization, especially in shallow water. Therefore, we propose a novel peak extraction passive source localization method based on the autocorrelation function, which does not require estimation of the relative arrival delay of the eigenray. According to a computer simulation, the proposed method can achieve good performance using only one hydrophone. Further, its performance is validated using wideband data collected on a vertical line array during the Shallow Water 2006 experiment.

关键词： Peak extraction passive source localization single hydrophone autocorrelation function shallow water

来源：评论

学校读者我要写书评

暂无评论

A novel bearing-assisted TDOA-GROA approach for passive source localization

引用

International Journal of Intelligent Computing and Cybernetics 2018年第1期11卷 2-19页

作者： Ji-An Luo Zhi-Wen Tan Dong-Liang Peng Key Lab for IOT and Information Fusion Technology of Zhejiang Hangzhou Dianzi UniversityHangzhouChina

Purpose–The passive source localization(PSL)problem using angles of arrival(AOA),time differences of arrival(TDOA)or gain ratios of arrival(GROA)is generally nonlinear and *** this research,the purpose of this paper is to design an accurate hybrid source localization approach to solve the PSL *** inspiration is drawn from the fact that the bearings,TDOAs and GROAs are complementary in terms of their geometry ***/methodology/approach–The maximum-likelihood(ML)method is reexamined by using hybrid *** assisted by the bearings,a new hybrid weighted least-squares(WLS)method is then proposed by jointly utilizing the bearing,TDOA and GROA ***–Theoretical performance analysis illustrates that the mean-square error of the ML or WLS method can attain the Cramér-Rao lower bound for Gaussian noiseover small error ***,the WLS method has much lower computational complexity than the ML *** with the AOA-only,TDOA-only,AOA-TDOA,TDOA-GROA methods,the localization accuracy can be greatly improved by combining the AOAs,TDOAs and GROAs,especially for some specific ***/value–A novel bearing-assisted TDOA-GROA method is proposed for source localization,and a new hybrid WLS estimator is presented inspired from the fact that the bearings,TDOAs and GROAs are complementary in terms of their geometry properties.

关键词： Bearing Gain ratio of arrival Hybrid measurements passive source localization Time difference of arrival

来源：评论

学校读者我要写书评

暂无评论

passive source localization Using Acoustic Intensity in Multipath-Dominant Shallow-Water Waveguide

引用

SENSORS 2021年第6期21卷 2198-2198页

作者： Kim, Sunhyo Cho, Sungho Jung, Seom-kyu Choi, Jee Woong Korea Inst Ocean Sci & Technol Marine Secur & Safety Res Ctr Busan 49111 South Korea Hanyang Univ ERICA Dept Marine Sci & Convergence Engn Ansan 15588 Gyeonggido South Korea

The array invariant technique has been recently proposed for passive source localization in the ocean. It has successfully estimated the source-receiver horizontal range in multipath-dominant shallow-water waveguides. However, it requires a relatively large-scale hydrophone array. This study proposes an array invariant method that uses acoustic intensity, which is a vector quantity that has the same direction as the sound wave propagating through a water medium. This method can be used to estimate not only the source-receiver horizontal range, but also the azimuth to an acoustic source. The feasibility of using a vector quantity for the array invariant method is examined through a simulation and an acoustic experiment in which particle velocity signals are obtained using a finite difference approximation of the pressure signals at two adjacent points. The source localization results estimated using acoustic intensity are compared with those obtained from beamforming of the acoustic signals acquired by the vertical line array.

关键词： particle velocity array invariant passive source localization

来源：评论

学校读者我要写书评

暂无评论

A NEW passive source localization METHOD USING AOA-GROA-TDOA IN WIRELESS SENSOR ARRAY NETWORKS AND ITS CRAMER-RAO BOUND ANALYSIS

A NEW PASSIVE SOURCE LOCALIZATION METHOD USING AOA-GROA-TDOA...

引用

IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Luo, Ji-An Zhang, Xiao-Ping Wang, Zhi Zhejiang Univ State Key Lab Ind Control Technol Hangzhou 310027 Zhejiang Peoples R China Ryerson Univ Dept Elect & Comp Engn Toronto ON M5B 2K3 Canada

ISBN: (纸本)9781479903566

In this paper, a new Cramer-Rao lower bound (CRLB) is derived for passive source localization based on angles-of-arrival (AOAs), gain ratios of arrival (GROAs) and time differences of arrival (TDOAs) in a wireless sensor array network. The derived CRLB using AOA-GROA-TDOA (AGT) is reduced to the one using AOA-GROA if no coherence exists across the arrays and lower than the CRLB using AOA-only. When the coherence is considered, the CRLB using AGT measurements is consistently lower than the other known bounds using AOA-only, TDOA-only and AOA-TDOA.

关键词： passive source localization Cramer-Rao lower bound (CRLB) angles-of-arrival (AOAs) gain ratios of arrival (GROAs) time differences of arrival (TDOAs)

来源：评论

学校读者我要写书评

暂无评论

Improving Robustness of passive source localization via Convex Optimization Based Mode Filtering

Improving Robustness of Passive Source Localization via Conv...

引用

OCEANS Conference

作者： Huang, Lu Fan, Shuangshuang Xu, Wen Yang, T. C. Zhejiang Univ Coll Informat Sci & Elect Engn Hangzhou 310027 Zhejiang Peoples R China

ISBN: (纸本)9781467397247

Model-based passive source localization is known to be quite sensitive to model mismatch. In this paper, we present a new implementation based on matched-mode processing. Specifically we formulate mode filtering as a convex optimization problem, and l(1)-regularized least squares is applied, which is robust in terms of the numerical implementation. Simulations with respective full-depth and partially-spanned apertures show that with sound speed mismatch in water column, the proposed method has a better or equal tolerance over traditional matched-field processing;with sound speed mismatch in sediment layer, combining with mode selection, where higher order modes strongly interacting with the bottom are removed, our approach has a slightly decreased bias. Overall the new method demonstrates improved robustness of passive source localization for the examples we studied.

关键词： passive source localization matched-mode processing mode-filtering convex optimization environmental mismatch robustness

来源：评论

学校读者我要写书评

暂无评论

Sensors and Target Geometry Effects on passive source localization Using Joint Time Deference of Arrival & Gain Ratio of Arrival Measurements 25

Sensors and Target Geometry Effects on Passive Source Locali...

引用

25th Iranian Conference on Electrical Engineering (ICEE)

作者： Talari, Saeed Fooladi Mohamedpour, Kamal KN Toosi Univ Technol Elect Engn Dept Tehran Iran

ISBN: (纸本)9781509059638

passive localization of an emitter has many applications, especially for Spectrum Surveillance. localization by time-delay and/or strength of signal when received by a number of spatially separated sensors are investigated in this paper. The effects of geometry and locating of sensors and target are investigated. The results shown the gain of localization using both time difference of arrival (TDOA) and gain ratio of arrival (GROA) compare to each approach alone and show the approaches sensitivity to above condition. The TDOA has blind lines, and GROA has high sensitivity to target distance, but the joint approach has both advantages and fewer disadvantages.

关键词： Time Diferens of Arrival (TDOA) Gain Ratio of Arrival (GROA) passive source localization Joint Method

来源：评论

学校读者我要写书评

暂无评论

Wideband passive source localization

引用

INVERSE PROBLEMS 2017年第8期33卷 1-1页

作者： Cheney, Margaret Given, James A. Colorado State Univ Ft Collins CO 80523 USA Naval Res Lab Washington DC 20375 USA

This paper develops a mathematical method for determining the locations of multiple transmitters from passive measurements of the signals at two or more receivers. The method applies to the case of emitters transmitti... 详细信息

关键词： passive source localization time-frequency analysis synthetic-aperture imaging

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：