Europe Oceans 2005最新文献_第8页

Global analysis of sea surface salinity variability from satellite data 基于卫星资料的全球海面盐度变化分析

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511676

S. Michel, B. Chapron, J. Tournadre, N. Reul

引用次数: 3

Multi-frequency DPSK modulation for long-range underwater acoustic communication 远距离水声通信的多频DPSK调制

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513207

Jianguo Huang, Yong-En Chen, Qunfei Zhang, Xiaohong Shen, F. Wang

{"title":"Multi-frequency DPSK modulation for long-range underwater acoustic communication","authors":"Jianguo Huang, Yong-En Chen, Qunfei Zhang, Xiaohong Shen, F. Wang","doi":"10.1109/OCEANSE.2005.1513207","DOIUrl":"https://doi.org/10.1109/OCEANSE.2005.1513207","url":null,"abstract":"Long-range shallow water channels are characterized by severe channel fading and low available signal to noise ratio (SNR). In classical underwater acoustic communication systems for above channels, incoherent MFSK modulation, or coherent modulation based on spatial diversity and adaptive equalizations are employed. Although being robustness to fading channels, the incoherent modulation cannot solve efficiently the conflict demands between the high signaling rate and reliability. Large receiver arrays may be restricted to be used for some size limited receiver platforms. A novel multi-frequency NDPSK (MFSK-NDPSK) modulation approach for long-range underwater acoustic communications is presented in this paper which is well suited in shallow water channels. The proposed approach is an efficient combination of MFSK and NDPSK modulation. Signals are NDPSK modulated with multi-carrier frequencies, and the carrier frequencies of adjacent symbols are located in different subbands. Information is transmitted by both frequencies and phases of signals. The theoretical analysis and simulation results are given, and also the experiments in lake were conducted. The results demonstrate that compared with single-carrier modulation, the MFSK-NDPSK modulation can increase data rate in same communication range, or increase the communication range while keeping the same data rate due to input SNR can be increased to improve the performance of decreasing inter-symbol interference and increasing reliability of communication systems.","PeriodicalId":120840,"journal":{"name":"Europe Oceans 2005","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116221993","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: 4

Towards a model-free denoising of underwater optical images 水下光学图像的无模型去噪方法研究

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511770

Arnold-Bas, Jean-Philippe Malkasset, Gilles Kervem

引用次数: 55

ESONET: toward an European network of excellence on subsea observatories ESONET:迈向欧洲海底观测站卓越网络

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513269

R. Person, J. Marvaldi, I. Priede, J. Mienert, T. V. van Weering, O. Pfannkuche, N. O'neill, A. Tselepides, L. Thomsen, P. Favali, F. Gasparoni, N. Zitellini, C. Millot, H. Gerber, Jorge Miguel Alberto de Miranda

引用次数: 2

Real-time sonar system using acoustic lens and numerical analysis based on 2D/3D parabolic equation method 基于二维/三维抛物方程法的声透镜实时声纳系统及数值分析

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511678

Y. Takase, T. Anada, T. Tsuchiya, N. Endoh, N. Nakamura, T. Tukioka

引用次数: 10

Comparison of space-time block code and layered space-time MIMO systems for an underwater acoustic channel 水声信道空时分组码与分层空时MIMO系统的比较

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511721

R. Ormondroyd, J. S. Dhanoa

引用次数: 11

Bathymetric sidescan sonar : a system dedicated to rapid environment assessment 测深侧扫声纳:一种用于快速环境评估的系统

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511695

B. Zerr, S.L. Goanvic, B. L. Breton, C. Genty

{"title":"Bathymetric sidescan sonar : a system dedicated to rapid environment assessment","authors":"B. Zerr, S.L. Goanvic, B. L. Breton, C. Genty","doi":"10.1109/OCEANSE.2005.1511695","DOIUrl":"https://doi.org/10.1109/OCEANSE.2005.1511695","url":null,"abstract":"The simultaneous acquisition of seabed backscattering and bathy-morphology can be achieved either by multibeam echo sounder or by bathymetric sidescan sonar. For rapid environment assessment (REA) prior to conduct mine counter measure operations, the sonar image, representing the seabed backscattering, is the primary source of information and the bathy-morphology the secondary one. Giving preference to the acquisition of the sonar image leads to operate at shallow grazing angle with high resolution imaging systems. Hence, the bathymetric sidescan sonar is well suited to complete the primary task of high resolution seabed imaging and the secondary task of acquiring simultaneously the bathy-morphology. Based on a commercial system, GESMA has developed a high resolution bathymetric sidescan sonar. After a description of the system and the array processing techniques which provides simultaneously the high resolution image and the bathy-morphology, the paper presents the experimental results from several sea trials conducted in various environments (Iroise sea-FR, Lyon gulf-FR, La Corona-SP, Ligurian Sea-IT, Victoria Harbor-CA). The analysis of these results demonstrates the potential and the limitations of the bathymetric sidescan sonar.","PeriodicalId":120840,"journal":{"name":"Europe Oceans 2005","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124023606","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: 5

Bistatic radar imaging system for sea surface target detection 海面目标探测双基地雷达成像系统

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511798

F. Comblet, M. Ayari, Fabrice Pellen, Ali Khenchaf

引用次数: 5

The effect of space-time joint correlation on the underwater acoustic MIMO capacity 空时联合相关对水声MIMO容量的影响

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511750

Dazhi Piao, Biao Jiang, Huabing Yu, Chang-yu Sun, Qihu Li

{"title":"The effect of space-time joint correlation on the underwater acoustic MIMO capacity","authors":"Dazhi Piao, Biao Jiang, Huabing Yu, Chang-yu Sun, Qihu Li","doi":"10.1109/OCEANSE.2005.1511750","DOIUrl":"https://doi.org/10.1109/OCEANSE.2005.1511750","url":null,"abstract":"The joint effect of space and time correlation on the underwater acoustic Multiple-Input-Multiple-Output (MIMO) channel capacity is studied using the multipath space-time correlation model with a moving transmit array and a stationary receive array. The space-time correlation function of the uniform liner array is generated, which can be expressed as the production of the space correlation function and the time correlation function, so the space-time joint correlated complex Gaussian variates can be generated by firstly generating n/sub T/*n/sub R/ independent random variates with the desired autocorrelation function, and then multiplied by the square root of their cross-correlation matrix. Using Monte Carlo simulations, the effect of space and time correlation on the underwater acoustic MIMO capacity is studied by the parameters of transmitter velocity, array element spacing, and elevation angle spread. It is shown from the simulation results that in the case of a poor scattering environment and not sufficiently large element spacing, when n transmitter elements and n receiver elements are employed, the outage capacity will not increase linearly with the increasing of n, and large capacity gains can only be obtained in a rich scattering environment and with sufficiently large element spacing, and the effect of transmitter velocity on the capacity depends on the block length T, when T/spl Gt/T/sub coh/, capacities with different transmitter velocity will be the same.","PeriodicalId":120840,"journal":{"name":"Europe Oceans 2005","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129110654","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: 4

On the analysis of buried objects by processing 3-D acoustic images 三维声图像处理对地埋物的分析

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511740

M. Palmese, A. Caiti, A. Trucco

引用次数: 1