OCEANS 2010 MTS/IEEE SEATTLE最新文献

A vertical hydrophone array coupled via inductive modem for detecting deep-ocean seismic and volcanic sources 一种通过感应调制解调器耦合的用于探测深海地震和火山源的垂直水听器阵列

OCEANS 2010 MTS/IEEE SEATTLE Pub Date : 2010-12-10 DOI: 10.1109/OCEANS.2010.5664085

H. Matsumoto, D. Bohnenstiehl, R. Dziak, L. Williams, R. Gliege, C. Meinig, P. Harben

{"title":"A vertical hydrophone array coupled via inductive modem for detecting deep-ocean seismic and volcanic sources","authors":"H. Matsumoto, D. Bohnenstiehl, R. Dziak, L. Williams, R. Gliege, C. Meinig, P. Harben","doi":"10.1109/OCEANS.2010.5664085","DOIUrl":"https://doi.org/10.1109/OCEANS.2010.5664085","url":null,"abstract":"A vertical autonomous hydrophone (VAUH) array useful for a long-term low-frequency underwater acoustic propagation study was developed at Oregon State University (OSU), North Carolina State University and the National Oceanic and Atmospheric Administration's (NOAA) Pacific Environmental Lab (PMEL). To analyze the arrival structure of the hydroacoustic signals in deep water, we needed a multichannel vertical hydrophone array with relative timing accuracy of as good as 10 ms/year where no GPS or Network Time Protocol (NTP) is available. A new scheme takes advantage of Inductive Modem Modules (IMM® from Sea-Bird Electronics) and a low-power accurate clock (QT2001® from Q-Tech Corporation). With the master unit sending an accurate 1-PPS pulse train once a day to slave instruments over a single wire inductive modem/mooring cable, it synchronizes the other slaves' clocks and keeps the timing errors among the instruments less than 10msec. As compared to the timing synchronization methods based on three-wire serial or NTP network interface, it only requires an insulated single wire mooring cable using seawater as a return. It is robust, low power and useful for longterm time synchronization of multiple instruments serially connected. As a trial, an array consisting of three vertical autonomous hydrophones (VAUH) was deployed in the Lau Basin from December 2009 to April 2010 at 21° 25'12.60\"S, 176° 12'45.50\"W. Each unit was fastened on a 1000-m long 5/16\" jacketed cable with a 500 m of separation. All three VAUHs recorded continuously the low frequency acoustic signal at 250-Hz sampling rate and maintained a relative timing accuracy of less than 10 ms. The acoustic record shows that the entire region is active with seismicity and submarine eruptions. The results of the four-month long monitoring and comparison with other single hydrophone moorings in the area are discussed.","PeriodicalId":363534,"journal":{"name":"OCEANS 2010 MTS/IEEE SEATTLE","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115225125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Frequency diversity for active sonar/radar application and optimal receiver design 主动声纳/雷达应用的频率分集和最佳接收机设计

OCEANS 2010 MTS/IEEE SEATTLE Pub Date : 2010-12-10 DOI: 10.1109/OCEANS.2010.5664071

Ning Ma

引用次数: 1

Target passive location by time reversal mirror using vertical array 利用垂直阵逆时镜对目标进行无源定位

OCEANS 2010 MTS/IEEE SEATTLE Pub Date : 2010-12-10 DOI: 10.1109/OCEANS.2010.5664038

Xueli Sheng, Fangfang Luo, Jidan Mei, Yong Guo

引用次数: 1

A survey on Terrain Based Navigation for AUVs 水下机器人地形导航研究进展

OCEANS 2010 MTS/IEEE SEATTLE Pub Date : 2010-12-10 DOI: 10.1109/OCEANS.2010.5664372

Sebastian Carreño, P. Wilson, P. Ridao, Y. Pétillot

引用次数: 89

A factor-graph based ZP-OFDM receiver for deep water acoustic channels 基于因子图的深水水声信道ZP-OFDM接收机

OCEANS 2010 MTS/IEEE SEATTLE Pub Date : 2010-12-10 DOI: 10.1109/OCEANS.2010.5664509

Zhaohui Wang, Shengli Zhou, J. Catipovic, Jie Huang

{"title":"A factor-graph based ZP-OFDM receiver for deep water acoustic channels","authors":"Zhaohui Wang, Shengli Zhou, J. Catipovic, Jie Huang","doi":"10.1109/OCEANS.2010.5664509","DOIUrl":"https://doi.org/10.1109/OCEANS.2010.5664509","url":null,"abstract":"In this paper, we present a factor-graph based receiver for zero-padded orthogonal frequency division multiplexing (ZP-OFDM) transmissions over deep water channels with extremely long delay spreads. Due to the geometric structure of deep oceans, the channel delay spread between the direct paths and surface/bottom reflections can be on the order of hundreds of milliseconds, which is usually several times larger than the ZP-OFDM block duration, leading to severe inter-block-interference (IBI). Channel time variation also introduces inter-carrier-interference (ICI). The proposed receiver addresses both IBI and ICI in a unified factor-graph representation. Data detection is performed according to the Gaussian message passing (GMP) principle which operates on the factor graph in an iterative manner. The proposed structure is further extended to the progressive/iterative framework, while the channel estimation is updated in each iteration loop. Compared with a multiuser receiver, which views overlapped blocks as coming from different users, the proposed receiver enjoys better block-error-rate performance and appealing expansion capability when multiple receiving-elements are used. Both simulation and experimental results are provided to validate the performance of the proposed receiver.","PeriodicalId":363534,"journal":{"name":"OCEANS 2010 MTS/IEEE SEATTLE","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125377940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Trends in low frequency ambient noise levels in the northeast Pacific Ocean 东北太平洋低频环境噪音水平的趋势

OCEANS 2010 MTS/IEEE SEATTLE Pub Date : 2010-12-10 DOI: 10.1109/OCEANS.2010.5664512

N. Chapman, A. Price

引用次数: 0

Quantifying turbulence for tidal power applications 潮汐发电应用中的湍流量化

OCEANS 2010 MTS/IEEE SEATTLE Pub Date : 2010-12-10 DOI: 10.1109/OCEANS.2010.5664600

J. Thomson, B. Polagye, M. Richmond, V. Durgesh

引用次数: 66

Results of a three-row synthetic aperture sonar for multipath rejection 三排合成孔径声纳多径抑制效果

OCEANS 2010 MTS/IEEE SEATTLE Pub Date : 2010-12-10 DOI: 10.1109/OCEANS.2010.5663800

Wen Xu, Qing Chen, Jianlong Li, Feng Sun, Xiang Pan

引用次数: 3

Monitoring marine mammal acoustics using Wave Glider 利用波浪滑翔机监测海洋哺乳动物的声学

OCEANS 2010 MTS/IEEE SEATTLE Pub Date : 2010-12-10 DOI: 10.1109/OCEANS.2010.5664537

S. Wiggins, J. Manley, E. Brager, B. Woolhiser

{"title":"Monitoring marine mammal acoustics using Wave Glider","authors":"S. Wiggins, J. Manley, E. Brager, B. Woolhiser","doi":"10.1109/OCEANS.2010.5664537","DOIUrl":"https://doi.org/10.1109/OCEANS.2010.5664537","url":null,"abstract":"The Wave Glider, a wave-powered unmanned maritime vehicle (UMV), represents a novel and unique approach to persistent ocean presence. Wave Gliders harvest the abundant energy contained in ocean waves to provide essentially limitless propulsion. The Wave Glider can operate as a vessel, covering long distances in the ocean, or as a station-keeping platform. Wave Gliders have demonstrated long open-ocean transits and extended deployments of up to one year. The High-frequency Acoustic Recording Package (HARP) is an autonomous data logging system optimized for long-term, broad-band marine mammal monitoring. The HARP system includes low-power electronics, high-speed data sampling, large capacity data storage, and batteries for self-contained power. In addition to housing the data logger, a hydrophone was designed to be towed behind the Wave Glider. Together, Scripps Institution of Oceanography and Liquid Robotics combined these two technologies to demonstrate a new approach to marine mammal monitoring. Providing a mobile, long-endurance and fully connected platform for acoustic monitoring, the Wave Glider with HARP enables new scientific results and improved economics. Over a series of engineering and scientific evaluations, the HARP system has proven effective for monitoring marine mammals when deployed on the Wave Glider. In this paper, we give an overview of the Wave Glider platform and integrated HARP system, and present results from the extensive engineering sea trials conducted with several prototype and production versions of the vehicle and data logger.","PeriodicalId":363534,"journal":{"name":"OCEANS 2010 MTS/IEEE SEATTLE","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114157052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 31

An investigation in dehazing compressed images and video 压缩图像和视频除雾技术的研究

OCEANS 2010 MTS/IEEE SEATTLE Pub Date : 2010-12-10 DOI: 10.1109/OCEANS.2010.5664479

Kristofor B. Gibson, D. Vo, Truong Q. Nguyen

引用次数: 32