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Space-frequency coded OFDM for underwater acoustic communications 用于水声通信的空频编码OFDM
2012 Oceans Pub Date : 2012-12-12 DOI: 10.1109/OCEANS.2012.6404916
Eduard Zorita, M. Stojanovic
{"title":"Space-frequency coded OFDM for underwater acoustic communications","authors":"Eduard Zorita, M. Stojanovic","doi":"10.1109/OCEANS.2012.6404916","DOIUrl":"https://doi.org/10.1109/OCEANS.2012.6404916","url":null,"abstract":"This work proposes an adaptive receiver for the space-frequency block coding scheme, in which Alamouti coding is applied over the carriers of an OFDM system with the aim of obtaining transmit diversity in an underwater acoustic channel. The receiver relies on the assumption that the channel transfer function does not change much over two consecutive carriers, and that the channel is slowly time-varying. Building on these assumptions we propose an adaptive channel estimation method based on Doppler prediction and time-smoothing, which effectively reduces the pilot overhead. System performance is demonstrated using real data transmitted over a shallow water channel in the 10-15 kHz acoustic band from a vehicle moving at 0.5-2 m/s, using QPSK and a varying number of carriers ranging from 64 to 1024. Results demonstrate a uniform gain over the single-transmitter case.","PeriodicalId":434023,"journal":{"name":"2012 Oceans","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121172048","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
Results of the first sea-test of Tsukuyomi: A prototype of underwater gliders for virtual mooring 筑见号首次海上试验结果:用于虚拟系泊的水下滑翔机原型
2012 Oceans Pub Date : 2012-12-01 DOI: 10.1109/OCEANS.2012.6404878
K. Asakawa, T. Kobayashi, M. Nakamura, Y. Watanabe, T. Hyakudome, Y. Itoh, J. Kojima
{"title":"Results of the first sea-test of Tsukuyomi: A prototype of underwater gliders for virtual mooring","authors":"K. Asakawa, T. Kobayashi, M. Nakamura, Y. Watanabe, T. Hyakudome, Y. Itoh, J. Kojima","doi":"10.1109/OCEANS.2012.6404878","DOIUrl":"https://doi.org/10.1109/OCEANS.2012.6404878","url":null,"abstract":"This paper presents the results of the first sea-test of Tsukuyomi - a prototype of underwater gliders for virtual mooring. Its will be able to stay in a designated water for more than one year, reciprocating between the sea-surface and the seafloor up to 3,000 meters in depth. It will sleep on the seafloor to elongate the operation time. We have successfully conducted tank-test in December 2011 and the first sea-test in March 2012. Although for the sake of safety, a thin string was connected to Tsukuyomi in the first sea-test, the dynamic stability, the maneuverability and the basic function of Tsukuyomi were confirmed.","PeriodicalId":434023,"journal":{"name":"2012 Oceans","volume":"32 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132968874","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
Advantages of pulse-shaping applied to OFDM systems over underwater acoustic channels 脉冲整形应用于水声信道OFDM系统的优点
2012 Oceans Pub Date : 2012-10-14 DOI: 10.1109/OCEANS.2012.6404831
S. Lmai, A. Bourre, C. Laot, S. Houcke
{"title":"Advantages of pulse-shaping applied to OFDM systems over underwater acoustic channels","authors":"S. Lmai, A. Bourre, C. Laot, S. Houcke","doi":"10.1109/OCEANS.2012.6404831","DOIUrl":"https://doi.org/10.1109/OCEANS.2012.6404831","url":null,"abstract":"Orthogonal frequency division multiplexing (OFDM) systems combat inter-symbol interferences (ISI) using cyclic prefix (CP) or the equivalent guard interval (GI) in case of zero-padded (ZP) OFDM. Nevertheless, inter-carrier interferences (ICI) due to the synchronization mismatches for instance, remain a strong disadvantage. Pulse-shaping is one of the solutions introduced in narrow band context. In this paper, we explored the use of this technique in wideband environments such underwater acoustic (UWA) channel. For this purpose, we developed an appropriate pulse-shaped CP-OFDM scheme. In addition to ICI reduction over channels with Doppler shift and spread, the proposed system, compared to the conventional CP-OFDM, achieves at equal transmit power important Eb/No savings: the longer the CP, the greater the saving. Unlike existing pulse-shaped OFDM designs, we propose to share out pulse-shaping between transmission and reception modules. Results from simulations are corroborated by sea trials.","PeriodicalId":434023,"journal":{"name":"2012 Oceans","volume":"34 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133204970","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
Sonar image preprocessing method based on homomorphic filtering 基于同态滤波的声纳图像预处理方法
2012 Oceans Pub Date : 2012-10-14 DOI: 10.1109/OCEANS.2012.6404933
I. Mandhouj, F. Maussang, B. Solaiman, H. Amiri
{"title":"Sonar image preprocessing method based on homomorphic filtering","authors":"I. Mandhouj, F. Maussang, B. Solaiman, H. Amiri","doi":"10.1109/OCEANS.2012.6404933","DOIUrl":"https://doi.org/10.1109/OCEANS.2012.6404933","url":null,"abstract":"This paper is concerned with the problem of preprocessing Synthetic Aperture Sonar (SAS) images. Considering its proprieties, this paper proposes to perform the homomorphic filter on the sonar images, corrupted by speckle. Moreover, robust criteria are defined to evaluate the proposed filtering. The statistic modeling of sonar image is then used to evaluate the contribution of the filtering method in the detection step.","PeriodicalId":434023,"journal":{"name":"2012 Oceans","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130973702","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
Enhanced sonar bathymetry tracking in multi-path environment 多路径环境下增强的声纳测深跟踪
2012 Oceans Pub Date : 2012-10-01 DOI: 10.1109/OCEANS.2012.6404982
A. Saucan, C. Sintes, T. Chonavel, Jean-Marc Le Caillec
{"title":"Enhanced sonar bathymetry tracking in multi-path environment","authors":"A. Saucan, C. Sintes, T. Chonavel, Jean-Marc Le Caillec","doi":"10.1109/OCEANS.2012.6404982","DOIUrl":"https://doi.org/10.1109/OCEANS.2012.6404982","url":null,"abstract":"In this paper we address DOA estimation for the side scan sonar in the presence of multiple interfering echoes. We illustrate the potential usage of high resolution methods and tracking algorithms. The proposed tracking algorithm is based on a apriori information on the sea-floor DOA angle. Because of the non-linearity of the model and non-Gaussian behavior of the observed 4600 data, the implementation of the proposed algorithm is based on the particle filter. The proposed tracking algorithm is shown to be able to resolve the multi-path interference problem. The heavy-tailed/non-Gaussian character of the data is noted and the Laplace distribution is shown to better characterize the tails of the observed data. The multivariate Laplace distribution is derived for the observed data and the particle filter coupled with the multivariate Laplace distribution is shown to provide better estimates than with the Gaussian assumption.","PeriodicalId":434023,"journal":{"name":"2012 Oceans","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115417221","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
Using ocean observing systems and local ecological knowledge to nowcast butterfish bycatch events in the Mid-Atlantic Bight longfin squid fishery 利用海洋观测系统和当地生态知识对中大西洋白鳍长鳍鱿鱼渔业的鲳鱼副渔获事件进行临近预报
2012 Oceans Pub Date : 2012-10-01 DOI: 10.1109/OCEANS.2012.6404954
Josh Kohut, L. Palamara, Eleanor A. Bochenek, Olaf P. Jensen, J. Manderson, Matthew J. Oliver, Steven Gray, Chris Roebuck
{"title":"Using ocean observing systems and local ecological knowledge to nowcast butterfish bycatch events in the Mid-Atlantic Bight longfin squid fishery","authors":"Josh Kohut, L. Palamara, Eleanor A. Bochenek, Olaf P. Jensen, J. Manderson, Matthew J. Oliver, Steven Gray, Chris Roebuck","doi":"10.1109/OCEANS.2012.6404954","DOIUrl":"https://doi.org/10.1109/OCEANS.2012.6404954","url":null,"abstract":"Through an interdisciplinary workgroup of habitat scientists, oceanographers, fishery managers, social scientists, and commercial fishermen we developed ecologically informed models for the specific purpose of reducing butterfish (Peprilus triacanthus) bycatch in the longfin squid (Doryteuthis pealeii) fishery in the Mid-Atlantic Bight (MAB). We used generalized additive modeling (GAM) to associate butterfish biomass collected during National Marine Fisheries Service (NMFS) bottom trawl surveys with benthic and pelagic habitat characteristics. Pelagic variables were obtained from the trawl survey CTD, satellite and high-frequency radar. The sea surface measures of temperature and color from the satellites and the surface current fields from the HF radar were provided through the Mid-Atlantic Regional Association Coastal Ocean Observing System (MARACOOS), a regional component of the U.S. Integrated Ocean Observing System (IOOS).","PeriodicalId":434023,"journal":{"name":"2012 Oceans","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115476577","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
Multi-vehicle autonomous sampling of a coastal thermal and effluent jet and plume 多车辆自主采样的沿海热和流出射流和羽
2012 Oceans Pub Date : 2012-10-01 DOI: 10.1109/OCEANS.2012.6405093
M. Gildner, G. Weymouth, N. Patrikalakis
{"title":"Multi-vehicle autonomous sampling of a coastal thermal and effluent jet and plume","authors":"M. Gildner, G. Weymouth, N. Patrikalakis","doi":"10.1109/OCEANS.2012.6405093","DOIUrl":"https://doi.org/10.1109/OCEANS.2012.6405093","url":null,"abstract":"Adaptive sampling algorithms and behavior-based approaches can aid in the rapid and accurate in-situ measurement and characterization of coastal environmental features such as industrial thermal effluent jets and plumes. To enable the development of these techniques we present a collection of simulation, estimation, and field tools for use within the Mission Oriented Operations Suite (MOOS). Key features include a multiparameter model of thermal effluent jets and plumes, simulated annealing parameter estimation, and a multi-sensor indicator function. Using these tools, an adaptive multi-vehicle transect sampling behavior is implemented to efficiently sample an industrial jet. The capabilities of this behavior are demonstrated in realistic mission simulations and in field trials using a fleet of autonomous surface vehicles.","PeriodicalId":434023,"journal":{"name":"2012 Oceans","volume":"555 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123117380","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: 0
Contact clustering and classification using likelihood-based similarities 使用基于似然相似性的接触聚类和分类
2012 Oceans Pub Date : 2012-10-01 DOI: 10.1109/OCEANS.2012.6404928
E. Hanusa, M. Gupta, D. Krout
{"title":"Contact clustering and classification using likelihood-based similarities","authors":"E. Hanusa, M. Gupta, D. Krout","doi":"10.1109/OCEANS.2012.6404928","DOIUrl":"https://doi.org/10.1109/OCEANS.2012.6404928","url":null,"abstract":"This paper presents the results of using a likelihood-based clustering step before tracking on a multistatic sonar step. The likelihood-based clustering appropriately models the measurement noise and allows for the incorporation of features. The clustering step also allows for the rejection of clutter and fusion of the contact measurements within a cluster. After clustering, fusion and classification, the tracking results are improved over previous preprocessing methods. Results are shown for the three scenarios in the PACSim dataset.","PeriodicalId":434023,"journal":{"name":"2012 Oceans","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124390422","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
Florida's Sea Water Cooling resource: An updated assessment 佛罗里达州的海水冷却资源:最新评估
2012 Oceans Pub Date : 2012-10-01 DOI: 10.1109/OCEANS.2012.6404966
D. N. Porak, J. Van Zwieten, L. Rauchenstein
{"title":"Florida's Sea Water Cooling resource: An updated assessment","authors":"D. N. Porak, J. Van Zwieten, L. Rauchenstein","doi":"10.1109/OCEANS.2012.6404966","DOIUrl":"https://doi.org/10.1109/OCEANS.2012.6404966","url":null,"abstract":"To assess the potential for utilizing Sea Water Cooling (SWC) systems in Florida, sea water temperatures are utilized by a representative SWC system to quantify potential energy savings. The HYbrid Coordinate Ocean Model (HYCOM) is used to characterize the near bottom temperatures statewide, suggesting that the temperatures needed for SWC are closest to shore off the Fort Lauderdale/Miami area. Numerous in situ data sets recently collected off Fort Lauderdale/Miami are presented alongside several historic data sets to characterize the resource in this area. This data suggests that a cold water resource with a mean temperature of 8-10°C exists off Fort Lauderdale in 160-220 m of water and 7-9°C exists off Miami in 200-300 m of water, both approximately 6 km from shore. These temperatures vary significantly at frequencies from about 2 days to 2 weeks with a seasonal dependence where these temperatures are cooler during the summer. A basic SWC plant model is presented to predict the energy savings for a generic 3.5 MW (1000 ton) AC system. This plant model suggests that off Fort Lauderdale the average energy required for this cooling system would be reduced by approximately 50% and off Miami it would be reduced by 54%.","PeriodicalId":434023,"journal":{"name":"2012 Oceans","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121817849","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
UW-HARQ: An underwater hybrid ARQ scheme: Design, implementation and initial test UW-HARQ:一种水下混合ARQ方案:设计、实施和初始测试
2012 Oceans Pub Date : 2012-10-01 DOI: 10.1109/OCEANS.2012.6405037
Haining Mo, A. Mingir, H. Alhumyani, Y. Albayram, Jun-hong Cui
{"title":"UW-HARQ: An underwater hybrid ARQ scheme: Design, implementation and initial test","authors":"Haining Mo, A. Mingir, H. Alhumyani, Y. Albayram, Jun-hong Cui","doi":"10.1109/OCEANS.2012.6405037","DOIUrl":"https://doi.org/10.1109/OCEANS.2012.6405037","url":null,"abstract":"In this paper, we investigate reliable end-to-end data transfer in Underwater Acoustic Networks. A hybrid ARQ scheme, named UW-HARQ is proposed, which combines FEC coding and ARQ. For the FEC coding, Random Binary Linear Coding is employed due to its low coding and decoding complexity. An adaptive coding ratio estimation scheme, which incorporates the PER information, is proposed to minimize the number of retransmissions between the source and the destination. For the ARQ, NACK packets are utilized to inform the source node how many and which packets to send out in a retransmission and ACK packets are used as indications of data packet recovery success. We implemented UW-HARQ on real UAN nodes by leveraging our hardware and software platform. Initial lab test results show that UW-HARQ achieves a larger throughput than TCP-like approaches with a comparable overhead.","PeriodicalId":434023,"journal":{"name":"2012 Oceans","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117123152","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: 22
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