2013 MTS/IEEE OCEANS - Bergen最新文献_第4页

Preliminary OFDM based acoustic communication for underwater sensor networks synchronization 基于OFDM的水声通信水下传感器网络同步初探

2013 MTS/IEEE OCEANS - Bergen Pub Date : 2013-06-10 DOI: 10.1109/OCEANS-BERGEN.2013.6608057

O. Pallarés, D. Sarria, C. Viñolo, J. del-Rio-Fernandez, A. Manuel-Lazaro

引用次数: 1

Oceanographic radar timing stability required for new ITU spectral allocations 国际电联新频谱分配需要海洋雷达定时稳定性

2013 MTS/IEEE OCEANS - Bergen Pub Date : 2013-06-10 DOI: 10.1109/OCEANS-BERGEN.2013.6608136

D. Barrick, C. Whelan, J. Harlan

引用次数: 0

TLPC: A two-level power control MAC protocol for collision avoidance in underwater acoustic networks 一种用于水声网络避碰的两级功率控制MAC协议

2013 MTS/IEEE OCEANS - Bergen Pub Date : 2013-06-10 DOI: 10.1109/OCEANS-BERGEN.2013.6607984

Yen-Da Chen, Chan-Ying Lien, Yanzhi Fang, K. Shih

引用次数: 12

MUST-READ: Multichannel sample-by-sample turbo resampling equalization and decoding 必读:多通道采样逐采样涡轮重采样均衡和解码

2013 MTS/IEEE OCEANS - Bergen Pub Date : 2013-06-10 DOI: 10.1109/OCEANS-BERGEN.2013.6608187

Thomas J. Riedl, A. Singer

{"title":"MUST-READ: Multichannel sample-by-sample turbo resampling equalization and decoding","authors":"Thomas J. Riedl, A. Singer","doi":"10.1109/OCEANS-BERGEN.2013.6608187","DOIUrl":"https://doi.org/10.1109/OCEANS-BERGEN.2013.6608187","url":null,"abstract":"When an underwater acoustic modem is installed on a mobile platform such as an underwater vehicle, a buoy, or a surface vessel, Doppler effects distort the acoustic signal significantly. The acoustic path between a surface vessel and an underwater vehicle, for example, can experience Mach numbers of one percent and more which can be catastrophic if not compensated dynamically. In this paper, we derive a sample-by-sample, recursive resampling technique, in which time-varying Doppler is explicitly modeled, tracked and compensated. Integrated into an iterative turbo equalization based receiver, this novel Doppler compensation technique achieves unprecedented communication performance in field tests and simulations. Our field data stems from the MACE10 experiment conducted in the shallow waters 100 km south of Martha's Vineyard, MA. Under challenging conditions (harsh multi-path, ranges up to 7.2 km, SNRs down to 2 dB and relative speeds up to 3 knots) our receiver achieved a raw data rate of over 39 kbits/s and a perfectly reliable net data rate of over 23 kbits/s (taking into account the overhead from equalizer training and channel coding) in less than 10 kHz of bandwidth. To illustrate the robustness of this approach to high rates of Doppler, a variety of simulations are also provided. We demonstrate that the performance of our algorithm does not depend on the absolute level of Doppler, but only on the rate of its variation.","PeriodicalId":224246,"journal":{"name":"2013 MTS/IEEE OCEANS - Bergen","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129841043","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: 10

Hydrodynamic coefficients and wave loads for a WEC device in heaving mode 波浪模式下WEC装置的水动力系数和波浪荷载

2013 MTS/IEEE OCEANS - Bergen Pub Date : 2013-06-10 DOI: 10.1109/OCEANS-BERGEN.2013.6608102

S. Olaya, J. Bourgeot, M. Benbouzid

引用次数: 12

Navigation and control of an AUV affected by asymmetric thruster response 受非对称推进器响应影响的水下航行器导航与控制

2013 MTS/IEEE OCEANS - Bergen Pub Date : 2013-06-10 DOI: 10.1109/OCEANS-BERGEN.2013.6608080

Calabrò Vincenzo, D. Francesco, Centro ' E. Piaggio, Caiti Andrea

引用次数: 1

Underwater communication and distributed localization of AUV teams 水下航行器小组水下通信与分布式定位

2013 MTS/IEEE OCEANS - Bergen Pub Date : 2013-06-10 DOI: 10.1109/OCEANS-BERGEN.2013.6608166

A. Caiti, V. Calabrò, T. Fabbri, D. Fenucci, A. Munafò

{"title":"Underwater communication and distributed localization of AUV teams","authors":"A. Caiti, V. Calabrò, T. Fabbri, D. Fenucci, A. Munafò","doi":"10.1109/OCEANS-BERGEN.2013.6608166","DOIUrl":"https://doi.org/10.1109/OCEANS-BERGEN.2013.6608166","url":null,"abstract":"This paper examines a cooperative localization algorithm for teams of Autonomous Underwater Vehicles, as developed within the project THESAURUS. The localization algorithm is strongly dependent on the underlying acoustic communication network, as it only uses acoustic data (range, USBL measurements and transmission of navigation information) to reduce the error and the uncertainty. The localization algorithm is based on the use of an Extended Kalman filter to maintain a model of the entire swarm, while adapting the measurement equation on the basis of the specific measurement available. Simulative results show how the algorithm is effective in fusing the information. The underwater communication networks is based on a time-division multiplexing scheme and on the use of the MOOS pub/sub for application integration. Implementation details of the network are provided, together with a description of how the positioning systems (e.g. USBL) have been integrated within the constraints of the network structure. Preliminary experimental results on localization and communication are provided as obtained from a recent engineering sea trial.","PeriodicalId":224246,"journal":{"name":"2013 MTS/IEEE OCEANS - Bergen","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126968830","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

Three-dimensional acoustic localization in the arctic using an ice-mounted geophone 利用安装在冰上的检波器在北极进行三维声学定位

2013 MTS/IEEE OCEANS - Bergen Pub Date : 2013-06-10 DOI: 10.1109/OCEANS-BERGEN.2013.6607963

S. Dosso

{"title":"Three-dimensional acoustic localization in the arctic using an ice-mounted geophone","authors":"S. Dosso","doi":"10.1109/OCEANS-BERGEN.2013.6607963","DOIUrl":"https://doi.org/10.1109/OCEANS-BERGEN.2013.6607963","url":null,"abstract":"This paper presents an approach to three-dimensional (3-D) localization of an acoustic source in the water column using a single three-component geophone mounted on the surface of Arctic sea ice. Source bearing is estimated by computing the received signal power as a function of horizontal look angle, applying seismic polarization filters to suppress ice shear waves with transverse particle motion. The inherent 180° ambiguity is resolved by considering vertical-radial particle motion, providing a unique bearing estimate. Source range and depth are estimated from arrival-time differences of the direct water-borne acoustic wave and ice seismic waves including the longitudinal plate mode and horizontally-polarized shear mode. This produces a system of two quadratic equations in two unknowns (range and depth) which admits two solutions, one of which corresponds to the correct source location; the secondary solution is often at an unphysical depth. The 3-D localization approach is applied to seismo-acoustic recordings collected on smooth and rough/ridged annual ice and on a multi-year ice floe. The results indicate good 3-D localization over the limited range over which first-break arrivals of the ice seismic waves could be reliably detected.","PeriodicalId":224246,"journal":{"name":"2013 MTS/IEEE OCEANS - Bergen","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130531176","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: 2

Low-cost moored instrumentation for citizens' education and participation in environmental stewardship 用于公民教育和参与环境管理的低成本系泊仪器

2013 MTS/IEEE OCEANS - Bergen Pub Date : 2013-06-10 DOI: 10.1109/OCEANS-BERGEN.2013.6608176

R. Bardaji, J. Piera

引用次数: 7

Texture analysis of seabed images: Quantifying the presence of Posidonia oceanica at Palma Bay 海底图像的纹理分析:量化帕尔马湾海洋波西多尼亚的存在

2013 MTS/IEEE OCEANS - Bergen Pub Date : 2013-06-10 DOI: 10.1109/OCEANS-BERGEN.2013.6607991

M. Massot-Campos, Gabriel Oliver-Codina, Laura Ruano-Amengual, Margaret Miró-Julià

{"title":"Texture analysis of seabed images: Quantifying the presence of Posidonia oceanica at Palma Bay","authors":"M. Massot-Campos, Gabriel Oliver-Codina, Laura Ruano-Amengual, Margaret Miró-Julià","doi":"10.1109/OCEANS-BERGEN.2013.6607991","DOIUrl":"https://doi.org/10.1109/OCEANS-BERGEN.2013.6607991","url":null,"abstract":"An automatic classifier algorithm has been designed to assess the population of Posidonia oceanica over a set of underwater images at Palma Bay. Law's energy filters and statistical descriptors of the Gray Level Co-occurrence Matrix have been use to correctly classify the input image patches in two classes: Posidonia oceanica or not Posidonia oceanica. The input images have been first preprocessed and splitted in three different patch sizes in order to find the best patch size to better classify this seagrass. From all the attributes obtained in these patches, a best subset algorithm has been run to choose the best ones and a decision tree classifier has been trained. The classifier was made by training a Logistic Model Tree from 125 pre-classified images. This classifier was finally tested on 100 new images. The classifier outputs gray level images where black color indicates Posidonia oceanica presence and white no presence. Intermediate values are obtained by overlapping the processed patches, resulting in a smoother final result. This images can be merged in an offline process to obtain density maps of this algae in the sea.","PeriodicalId":224246,"journal":{"name":"2013 MTS/IEEE OCEANS - Bergen","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132960364","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: 26