OCEANS'10 IEEE SYDNEY最新文献_第3页

The Wave Glider: A persistent platform for ocean science 波浪滑翔机:海洋科学的持久平台

OCEANS'10 IEEE SYDNEY Pub Date : 2010-05-24 DOI: 10.1109/OCEANSSYD.2010.5603614

J. Manley, S. Willcox

引用次数: 144

The use of HF radar surface currents for computing Lagrangian trajectories: Benefits and issues 利用高频雷达表面电流计算拉格朗日轨迹:好处和问题

OCEANS'10 IEEE SYDNEY Pub Date : 2010-05-24 DOI: 10.1109/OCEANSSYD.2010.5603644

A. Mantovanelli, M. Heron, A. Prytz

{"title":"The use of HF radar surface currents for computing Lagrangian trajectories: Benefits and issues","authors":"A. Mantovanelli, M. Heron, A. Prytz","doi":"10.1109/OCEANSSYD.2010.5603644","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603644","url":null,"abstract":"Surface coastal currents mapped by a pair of high frequency ground-wave radars (HFR) have been used to predict Lagrangian trajectories in the proximity of Heron Island (Capricorn Bunker Group, Great Barrier Reef, Australia), and to compare with the current data measured by an Acoustic Doppler Current Profiler (ADCP) at three mooring stations. Overall the HRF and ADCP absolute current speeds showed a difference less than ±0.15 m s−1 for 68% of the observations. A good agreement between HFR (at a depth of 1.5 m) and ADCP (at a depth of 5.5 m) data were observed for the u-component (cross-shelf) which presented a stronger tidal signal, while a poor comparison was found for the v-component (north-south) more influenced by the south-easterly and northerly winds. The HFR allowed inclusion of not only the temporal, but also the spatial current variability in the tracking computation. This proved to be crucial because the Lagrangian trajectories were very sensitive to the starting position and time in the studied area, where the currents exhibit a large spatial variation imposed by tides, winds, large scale circulation and topography. One challenge in applying HFR data for Lagrangian tracking consists of estimating the missing values and including the effects of small scale fluctuations.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128166132","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

Mapping marine phytoplankton assemblages from a hyperspectral and Artificial Intelligence perspective 从高光谱和人工智能的角度绘制海洋浮游植物组合

OCEANS'10 IEEE SYDNEY Pub Date : 2010-05-24 DOI: 10.1109/OCEANSSYD.2010.5603683

E. Torrecilla, J. Piera, S. Pons, I. F. Aymerich, A. Vilamala, J. Arcos, E. Plaza

引用次数: 1

Cooperative positioning using range-only measurements between two AUVs 在两个auv之间使用仅距离测量的合作定位

OCEANS'10 IEEE SYDNEY Pub Date : 2010-05-24 DOI: 10.1109/OCEANSSYD.2010.5603615

G. Rui, M. Chitre

引用次数: 74

Laboratory verification on waveform inversion of an internal solitary wave in the South China Sea 南海内孤立波波形反演的实验室验证

OCEANS'10 IEEE SYDNEY Pub Date : 2010-05-24 DOI: 10.1109/OCEANSSYD.2010.5603810

M. Cheng, J. R. Hsu

引用次数: 0

Sonar uncertainty and sensitivity analysis techniques 声纳不确定度和灵敏度分析技术

OCEANS'10 IEEE SYDNEY Pub Date : 2010-05-24 DOI: 10.1109/OCEANSSYD.2010.5603543

D. Sweet, C. Gillard

引用次数: 0

Event-based motion coordination of multiple underwater vehicles under disturbances 干扰下基于事件的多水下航行器运动协调

OCEANS'10 IEEE SYDNEY Pub Date : 2010-05-24 DOI: 10.1109/OCEANSSYD.2010.5603980

P. Teixeira, Dimos V. Dimarogonas, K. Johansson, J. Sousa

引用次数: 25

Fiber laser sensor hydrophone performance 光纤激光传感器水听器性能

OCEANS'10 IEEE SYDNEY Pub Date : 2010-05-24 DOI: 10.1109/OCEANSSYD.2010.5603851

I. Bedwell, D. Jones

引用次数: 14

DSP implementation of SISO and MIMO OFDM acoustic modems DSP实现SISO和MIMO OFDM声学调制解调器

OCEANS'10 IEEE SYDNEY Pub Date : 2010-05-24 DOI: 10.1109/OCEANSSYD.2010.5603887

Hai Yan, Shengli Zhou, Z. Shi, Jun-hong Cui, L. Wan, Jie Huang, Hao Zhou

{"title":"DSP implementation of SISO and MIMO OFDM acoustic modems","authors":"Hai Yan, Shengli Zhou, Z. Shi, Jun-hong Cui, L. Wan, Jie Huang, Hao Zhou","doi":"10.1109/OCEANSSYD.2010.5603887","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603887","url":null,"abstract":"Significant progress has been made recently on the use of multicarrier modulation in the form of orthogonal frequency division multiplexing (OFDM) for high data rate underwater acoustic communications. In this paper, we present implementation results of OFDM acoustic modems under both single-input single-output and multi-input multi-output (two transmitters and two receivers) settings. The data rates are 3.2 kb/s and 6.4 kb/s for SISO and MIMO systems, respectively, with QPSK modulation, rate-1/2 channel coding, and signal bandwidth of 6 kHz. Real-time operation has been achieved with impressive margins, using a floating point TMS320C6713 DSP development board. Specifically, with convolutional coding, the processing time for each OFDM block of duration 210 ms is about 38 ms and 77 ms for SISO and MIMO settings, respectively, with the DSP running at 225 MHz. With nonbinary low-density parity-check (LDPC) coding, which gains about 2 dB in error performance relative to convolutional coding, the processing time per block increases to 50 ms and 101 ms for SISO and MIMO settings, respectively. We have also implemented the OFDM acoustic modems using a fixed-point TMS320C6416 DSP development board, where the DSP core runs at 1 GHz. The per-block processing time reduces by two thirds with negligible performance degradation.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"21 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116476883","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: 44

Iterative Adaptive Approach for wide-band active sonar array processing 宽带主动声呐阵处理的迭代自适应方法

OCEANS'10 IEEE SYDNEY Pub Date : 2010-05-24 DOI: 10.1109/OCEANSSYD.2010.5603915

Zhaofu Chen, Jian Li, P. Stoica, K. Lo

{"title":"Iterative Adaptive Approach for wide-band active sonar array processing","authors":"Zhaofu Chen, Jian Li, P. Stoica, K. Lo","doi":"10.1109/OCEANSSYD.2010.5603915","DOIUrl":"https://doi.org/10.1109/OCEANSSYD.2010.5603915","url":null,"abstract":"Sector scan sonars can be used for detection and identification of man-made objects located on the sea floor. Wide-band acoustic signals are employed in this kind of sonar system to enhance range resolution. The conventional delay-and-sum beamformer (CBF) produces sonar images with high sidelobe levels and poor angular resolution. Adaptive beamforming algorithms together with spatial resampling can be applied to mitigate this problem. The algorithm “Spatial Processing: Optimized and Constrained” (SPOC), used in a recent work, is studied herein and shown to be identical to the basic form of the FOCal Underdetermined System Solver (FOCUSS) algorithm. A recently developed algorithm, the Iterative Adaptive Approach (IAA), is proposed for this sonar application and various implementation issues are discussed. Experimental results show that the IAA algorithm produces better sonar images than the CBF and Minimum Variance Distortionless Response (MVDR) algorithms in terms of sidelobe suppression and angular resolution. Compared with SPOC, IAA provides clearer acoustic highlights of the imaged object and a higher density of pixels representing the object.","PeriodicalId":129808,"journal":{"name":"OCEANS'10 IEEE SYDNEY","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121890556","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: 7