Pub Date : 2001-11-05DOI: 10.1109/OCEANS.2001.968278
G. Jensen
The South Florida Ocean Measurement Center (SFOMC) is a coastal ocean observatory combining government, commercial, and academic resources, intellectual talents, and modern facilities to create a new global-interest center where high fidelity and cost effective experiments and studies can be conducted. The combined SFOMC in-water and shore facilities located in southern Florida provide a fully integrated observatory to archive measurements, provide ground truth to validate hydrographic survey systems, intercompare in situ data with emerging oceanographic instruments, and to disseminate environmental information supporting maritime operations. Specific accomplishments at SFOMC include installation of innovative environmental arrays and data analyses, a 4-dimensional current experiment, AUV operations and mine hunting experiments, adverse weather experiments, studies of fluctuations, coherence, and predictability of long range shallow water acoustic propagation, bio/geological inventories and assessments, and rehearsals for Fleet Battle Experiments. The implementation of SFOMC as a Government-University laboratory to observe littoral processes has been successful. SFOMC is being sustained through ongoing operations and experiments with established sponsorship from ONR, NSF, NOPP, NAVSEA, and DARPA as well as state and local government.
{"title":"South Florida Ocean Measurement Center (SFOMC) \"a coastal ocean observatory\"","authors":"G. Jensen","doi":"10.1109/OCEANS.2001.968278","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968278","url":null,"abstract":"The South Florida Ocean Measurement Center (SFOMC) is a coastal ocean observatory combining government, commercial, and academic resources, intellectual talents, and modern facilities to create a new global-interest center where high fidelity and cost effective experiments and studies can be conducted. The combined SFOMC in-water and shore facilities located in southern Florida provide a fully integrated observatory to archive measurements, provide ground truth to validate hydrographic survey systems, intercompare in situ data with emerging oceanographic instruments, and to disseminate environmental information supporting maritime operations. Specific accomplishments at SFOMC include installation of innovative environmental arrays and data analyses, a 4-dimensional current experiment, AUV operations and mine hunting experiments, adverse weather experiments, studies of fluctuations, coherence, and predictability of long range shallow water acoustic propagation, bio/geological inventories and assessments, and rehearsals for Fleet Battle Experiments. The implementation of SFOMC as a Government-University laboratory to observe littoral processes has been successful. SFOMC is being sustained through ongoing operations and experiments with established sponsorship from ONR, NSF, NOPP, NAVSEA, and DARPA as well as state and local government.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114819678","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}
Pub Date : 2001-11-05DOI: 10.1109/OCEANS.2001.968761
Kangsoo Kim, T. Sutoh, T. Ura, T. Obara
An AUV (autonomous underwater vehicle) of R-One Robot, developed by joint cooperation between IIS, University of Tokyo and Mitsui Engineering & Shipbuilding, has been achieving several missions since it was constructed. Since it is not unusual for an AUV to face more or less strong currents during its operation, it is not so easy to accomplish the mission of route keeping precisely due to the interaction between current and vehicle motion. In this research, a dynamics model of the R-One Robot has been established through iterative numerical calculations based on CFD analysis. Heading angle control with additional correction to keep to the target route under current interaction has been carried out by using a PID controller based on the derived dynamics model. Achievement of superior route keeping ability has been confirmed from the result of numerical simulation as well as the recorded cruising trajectory during its actual operation at sea. With this improved route keeping ability, the R-One Robot is expected to be more useful for difficult missions.
{"title":"Route keeping control of AUV under current by using dynamics model via CFD analysis","authors":"Kangsoo Kim, T. Sutoh, T. Ura, T. Obara","doi":"10.1109/OCEANS.2001.968761","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968761","url":null,"abstract":"An AUV (autonomous underwater vehicle) of R-One Robot, developed by joint cooperation between IIS, University of Tokyo and Mitsui Engineering & Shipbuilding, has been achieving several missions since it was constructed. Since it is not unusual for an AUV to face more or less strong currents during its operation, it is not so easy to accomplish the mission of route keeping precisely due to the interaction between current and vehicle motion. In this research, a dynamics model of the R-One Robot has been established through iterative numerical calculations based on CFD analysis. Heading angle control with additional correction to keep to the target route under current interaction has been carried out by using a PID controller based on the derived dynamics model. Achievement of superior route keeping ability has been confirmed from the result of numerical simulation as well as the recorded cruising trajectory during its actual operation at sea. With this improved route keeping ability, the R-One Robot is expected to be more useful for difficult missions.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116055799","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}
Pub Date : 2001-11-05DOI: 10.1109/OCEANS.2001.968338
F. Blackmon, E. Sozer, M. Murandian, J. Proakis, M. Salehi
The use of an adaptive decision feedback equalizer (DFE) in the demodulation of high speed data transmitted through underwater acoustic channels has been well established. In many channels, however, the performance obtained with the conventional DFE and decoder is not adequate for particular applications. This paper considers four different iterative equalization/decoder techniques for improving the performance of the receiver. One technique uses the hard decisions from the decoder output to feed back to the DFE for making additional passes through the data. The second technique uses the soft outputs from the decoder output to feed back to the DFE. The third technique, termed an integral iterative equalization scheme, is designed to mitigate and correct the errors being fed back to the DFE in a block fashion within the data packet. Finally, the fourth technique, called a turbo equalizer, is an iterative scheme which employs a MAP equalizer and a MAP decoder. These iterative/integral equalization/decoding techniques are applied to convolutionally encoded BPSK and QPSK data received during several field tests. The performance of the iterative equalizer/decoder algorithms is compared on the basis of bit error rate and packet statistics.
{"title":"Performance comparison of iterative/integral equalizer/decoder structures for underwater acoustic channels","authors":"F. Blackmon, E. Sozer, M. Murandian, J. Proakis, M. Salehi","doi":"10.1109/OCEANS.2001.968338","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968338","url":null,"abstract":"The use of an adaptive decision feedback equalizer (DFE) in the demodulation of high speed data transmitted through underwater acoustic channels has been well established. In many channels, however, the performance obtained with the conventional DFE and decoder is not adequate for particular applications. This paper considers four different iterative equalization/decoder techniques for improving the performance of the receiver. One technique uses the hard decisions from the decoder output to feed back to the DFE for making additional passes through the data. The second technique uses the soft outputs from the decoder output to feed back to the DFE. The third technique, termed an integral iterative equalization scheme, is designed to mitigate and correct the errors being fed back to the DFE in a block fashion within the data packet. Finally, the fourth technique, called a turbo equalizer, is an iterative scheme which employs a MAP equalizer and a MAP decoder. These iterative/integral equalization/decoding techniques are applied to convolutionally encoded BPSK and QPSK data received during several field tests. The performance of the iterative equalizer/decoder algorithms is compared on the basis of bit error rate and packet statistics.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114690003","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}
Pub Date : 2001-11-05DOI: 10.1109/OCEANS.2001.968696
R. Stokey, T. Austin, B. Allen, N. Forrester, E. Gifford, R. Goldsborough, G. Packard, M. Purcell, C. von Alt
For several years, the engineers of the Oceanographic Systems Laboratory have been developing a version of the REMUS autonomous underwater vehicle (AUV) equipped with a Marine Sonics, Ltd. sidescan sonar. A sidescan equipped AUV allows operators to maintain a safe standoff distance from a potential minefield, and when equipped with other instrumentation provides high resolution hydrographic data as well. This paper provides a general discussion of sidescan search strategies as pertains to mine-hunting. It also describes the hardware and software interface from the vehicle and user interface to the sidescan system that allows pre-launch performance verification, and rapid post mission data analysis and exporting. results of this test are discussed and explained, including a variety of performance metrics. A practical example is provided. During August of 2000, the REMUS system participated in the US Navy exercise, "Fleet Battle Experiment-Hotel" and generated a high resolution map of a minefield covering over 3 square kilometers. The results of this test are discussed and explained, including a variety of performance metrics.
{"title":"Very shallow water mine countermeasures using the REMUS AUV: a practical approach yielding accurate results","authors":"R. Stokey, T. Austin, B. Allen, N. Forrester, E. Gifford, R. Goldsborough, G. Packard, M. Purcell, C. von Alt","doi":"10.1109/OCEANS.2001.968696","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968696","url":null,"abstract":"For several years, the engineers of the Oceanographic Systems Laboratory have been developing a version of the REMUS autonomous underwater vehicle (AUV) equipped with a Marine Sonics, Ltd. sidescan sonar. A sidescan equipped AUV allows operators to maintain a safe standoff distance from a potential minefield, and when equipped with other instrumentation provides high resolution hydrographic data as well. This paper provides a general discussion of sidescan search strategies as pertains to mine-hunting. It also describes the hardware and software interface from the vehicle and user interface to the sidescan system that allows pre-launch performance verification, and rapid post mission data analysis and exporting. results of this test are discussed and explained, including a variety of performance metrics. A practical example is provided. During August of 2000, the REMUS system participated in the US Navy exercise, \"Fleet Battle Experiment-Hotel\" and generated a high resolution map of a minefield covering over 3 square kilometers. The results of this test are discussed and explained, including a variety of performance metrics.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125383275","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}
Pub Date : 2001-11-05DOI: 10.1109/OCEANS.2001.968791
D. Kriebel, W. Finlayson
This paper presents an overview of the capstone design course in the undergraduate ocean engineering curriculum at the US Naval Academy. The emphasis of this course is on integrating "real-world" design problems and design procedures into the academic curriculum, to benefit the students as well as public sector "clients" who volunteer their time to mentor students. Examples of projects are given in the paper, and several are highlighted to show how student design can lead, after additional professional design effort, to completed constructed projects.
{"title":"Ocean engineering design experience at the US Naval Academy","authors":"D. Kriebel, W. Finlayson","doi":"10.1109/OCEANS.2001.968791","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968791","url":null,"abstract":"This paper presents an overview of the capstone design course in the undergraduate ocean engineering curriculum at the US Naval Academy. The emphasis of this course is on integrating \"real-world\" design problems and design procedures into the academic curriculum, to benefit the students as well as public sector \"clients\" who volunteer their time to mentor students. Examples of projects are given in the paper, and several are highlighted to show how student design can lead, after additional professional design effort, to completed constructed projects.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125303656","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}
Pub Date : 2001-11-05DOI: 10.1109/OCEANS.2001.968265
M. Fan, Y. B. Low, J.S. Smith, J. C. Evans, J. Seim
STAR (Subsea Tools Application Research) was an underwater technology development project to develop advanced tools and control techniques for remote subsea intervention in diverless operations. As part of the STAR project an all-electric torque tool control system for underwater operation was developed. Its mechanical and control system design is modular, allowing a ROV or AUV to perform a range of subsea tasks such as bolt tightening/slackening, drilling, stabbing and metering. An important feature of the design philosophy was its modular, hierarchical control structure. The hierarchical design and utilization of controller area network (CAN) technology made it possible to implement a sophisticated real-time control system. This paper gives an overview of the STAR project, technical details of multilayer control system and its communications structure. Details of the testing procedures, and application areas are also discussed.
STAR (Subsea Tools Application Research，水下工具应用研究)是一项水下技术开发项目，旨在开发先进的水下工具和控制技术，用于无潜水器作业中的远程水下干预。作为STAR项目的一部分，开发了用于水下作业的全电动扭矩工具控制系统。它的机械和控制系统设计是模块化的，允许ROV或AUV执行一系列水下任务，如螺栓拧紧/松开、钻井、刺入和计量。该设计理念的一个重要特征是其模块化、分层控制结构。分层设计和控制器局域网(CAN)技术的应用使复杂的实时控制系统成为可能。本文概述了STAR项目，多层控制系统的技术细节及其通信结构。详细的测试程序和应用领域也进行了讨论。
{"title":"STAR (Subsea Tools Application Research) design of a general purpose subsea torque tool for ROV or UUV","authors":"M. Fan, Y. B. Low, J.S. Smith, J. C. Evans, J. Seim","doi":"10.1109/OCEANS.2001.968265","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968265","url":null,"abstract":"STAR (Subsea Tools Application Research) was an underwater technology development project to develop advanced tools and control techniques for remote subsea intervention in diverless operations. As part of the STAR project an all-electric torque tool control system for underwater operation was developed. Its mechanical and control system design is modular, allowing a ROV or AUV to perform a range of subsea tasks such as bolt tightening/slackening, drilling, stabbing and metering. An important feature of the design philosophy was its modular, hierarchical control structure. The hierarchical design and utilization of controller area network (CAN) technology made it possible to implement a sophisticated real-time control system. This paper gives an overview of the STAR project, technical details of multilayer control system and its communications structure. Details of the testing procedures, and application areas are also discussed.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114604939","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}
Pub Date : 2001-11-05DOI: 10.1109/OCEANS.2001.968072
T. Thys, B. Hobson, H. Dewar
Advances in animal tag technologies now offer a significant method for gathering oceanographic information throughout the world's oceans. By employing marine organisms as oceanic samplers (MOOS), vast amounts of in situ data (e.g. temperature, productivity and salinity in relation to depth and location) can be archived and transmitted via satellite or obtained directly from the tag if the tag is recovered. The beauty of this technique is that no on-board navigation system nor external propulsion supply is required. The animal performs the work necessary to transport the equipment and chooses what transect to run. The gathered data, guided by the animal's point of view, reveal secrets of the animal's life and pinpoint environmental features most important to its lifestyle. Depending on the species tagged, the animal may perform a number of tasks of great interest to oceanographers e.g. gathering data from remote regions like the poles, performing repeated deep dives, targeting specific food sources or oceanographic features and traversing massive expanses of ocean. The breadth of animal species with which this technology has been successfully deployed is growing steadily. The list includes bluefin and yellowfin tuna, white sharks, thresher sharks, whale sharks, ocean sunfish, marine turtles, seals, sea lions, and seabirds. It is hoped that the wealth of tag data already being collected worldwide can serve both the needs of the biologic and oceanographic communities alike.
{"title":"Marine animals: the next generation of autonomous underwater vehicle?","authors":"T. Thys, B. Hobson, H. Dewar","doi":"10.1109/OCEANS.2001.968072","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968072","url":null,"abstract":"Advances in animal tag technologies now offer a significant method for gathering oceanographic information throughout the world's oceans. By employing marine organisms as oceanic samplers (MOOS), vast amounts of in situ data (e.g. temperature, productivity and salinity in relation to depth and location) can be archived and transmitted via satellite or obtained directly from the tag if the tag is recovered. The beauty of this technique is that no on-board navigation system nor external propulsion supply is required. The animal performs the work necessary to transport the equipment and chooses what transect to run. The gathered data, guided by the animal's point of view, reveal secrets of the animal's life and pinpoint environmental features most important to its lifestyle. Depending on the species tagged, the animal may perform a number of tasks of great interest to oceanographers e.g. gathering data from remote regions like the poles, performing repeated deep dives, targeting specific food sources or oceanographic features and traversing massive expanses of ocean. The breadth of animal species with which this technology has been successfully deployed is growing steadily. The list includes bluefin and yellowfin tuna, white sharks, thresher sharks, whale sharks, ocean sunfish, marine turtles, seals, sea lions, and seabirds. It is hoped that the wealth of tag data already being collected worldwide can serve both the needs of the biologic and oceanographic communities alike.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":" 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120827663","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}
Pub Date : 2001-11-05DOI: 10.1109/OCEANS.2001.968276
I. Lam, I. J. Hodgkiss
An apparently increasing trend of red tide occurrences and/or harmful algal blooms has become a global issue, particularly in coastal zones with 'cultural eutrophication', but no effective measures have been developed yet for detection and early warning, in order to prevent public health problems and the threat of economic losses. A multiple-probe-and-sensor based telemetry system has been developed to monitor water quality parameters, hydrographic variables and meteorological conditions, in order to provide almost real time and continuous data for red tide studies. Several red tides have been detected with the system during the study period and this suggests that it potentially fulfills the purposes of detection and early warning. However, there is still room to improve, upgrade and develop further this prototype system to apply it widely to coastal regions, particularly fish culture zones in which red tides occur frequently and intensively. Real-time telemetric data can provide background information concerning red tide formation conditions, and can be extended to bio-ecological studies so as to enhance our understanding of the interactions between red tides and marine microalgal dynamics, by overcoming the limitations of the traditional approaches.
{"title":"A real time measurement system for red tide studies","authors":"I. Lam, I. J. Hodgkiss","doi":"10.1109/OCEANS.2001.968276","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968276","url":null,"abstract":"An apparently increasing trend of red tide occurrences and/or harmful algal blooms has become a global issue, particularly in coastal zones with 'cultural eutrophication', but no effective measures have been developed yet for detection and early warning, in order to prevent public health problems and the threat of economic losses. A multiple-probe-and-sensor based telemetry system has been developed to monitor water quality parameters, hydrographic variables and meteorological conditions, in order to provide almost real time and continuous data for red tide studies. Several red tides have been detected with the system during the study period and this suggests that it potentially fulfills the purposes of detection and early warning. However, there is still room to improve, upgrade and develop further this prototype system to apply it widely to coastal regions, particularly fish culture zones in which red tides occur frequently and intensively. Real-time telemetric data can provide background information concerning red tide formation conditions, and can be extended to bio-ecological studies so as to enhance our understanding of the interactions between red tides and marine microalgal dynamics, by overcoming the limitations of the traditional approaches.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123351289","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}
Pub Date : 2001-11-05DOI: 10.1109/OCEANS.2001.968752
J. Bae, J. Chun, Taekshik Jeong, Beobmo Gu, Sang Tae Kim
We propose the methods to design the finite impulse response (FIR) and the infinite impulse response (IIR) lattice filters using Schur's (1917) algorithm through the spectral factorization of the covariance matrix by circulant matrix factorization. Circulant matrix factorization is also very powerful tool used for spectral factorization of the covariance polynomial in matrix domain to obtain the minimum phase polynomial without the polynomial root finding problem. The Schur algorithm is a method for fast Cholesky factorization of the Toeplitz matrix, which easily determines the lattice filter parameters. Examples for the case of the FIR filter and for the IIR filter are included, and the performance of our method is checked by comparison with other methods (polynomial root finding and cepstral deconvolution).
{"title":"Design of FIR/IIR lattice filters using the circulant matrix factorization","authors":"J. Bae, J. Chun, Taekshik Jeong, Beobmo Gu, Sang Tae Kim","doi":"10.1109/OCEANS.2001.968752","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968752","url":null,"abstract":"We propose the methods to design the finite impulse response (FIR) and the infinite impulse response (IIR) lattice filters using Schur's (1917) algorithm through the spectral factorization of the covariance matrix by circulant matrix factorization. Circulant matrix factorization is also very powerful tool used for spectral factorization of the covariance polynomial in matrix domain to obtain the minimum phase polynomial without the polynomial root finding problem. The Schur algorithm is a method for fast Cholesky factorization of the Toeplitz matrix, which easily determines the lattice filter parameters. Examples for the case of the FIR filter and for the IIR filter are included, and the performance of our method is checked by comparison with other methods (polynomial root finding and cepstral deconvolution).","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128497443","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}
Pub Date : 2001-11-05DOI: 10.1109/OCEANS.2001.968285
G. Karafiath, J. Hotaling, J. Meehan
The authors review the need for a quiet fisheries research ship to protect and maintain fish stocks and marine mammals. The ship design, construction, and acquisition processes are presented in overview. The main mission of the Fisheries Research Vessel (FRV) depends greatly on acoustic sensor performance. A major concern in achieving maximum efficiency from modern acoustic sounders is the reduction of bubbles and the control of bubble sweepdown patterns that flow over the acoustic sensors. Design efforts related to problems on earlier ships are reviewed, including the extensive efforts undertaken to minimize bubble sweepdown on the T-AGS 60 PATHFINDER Class. The authors describe the application of earlier US Navy work to the design of NOAA's FRV 40 and how the design takes advantage of many previous hydrodynamic and ship design developments. A discussion of subsequent model tests to verify the design is included.
{"title":"Fisheries Research Vessel hydrodynamic design minimizing bubble sweepdown","authors":"G. Karafiath, J. Hotaling, J. Meehan","doi":"10.1109/OCEANS.2001.968285","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968285","url":null,"abstract":"The authors review the need for a quiet fisheries research ship to protect and maintain fish stocks and marine mammals. The ship design, construction, and acquisition processes are presented in overview. The main mission of the Fisheries Research Vessel (FRV) depends greatly on acoustic sensor performance. A major concern in achieving maximum efficiency from modern acoustic sounders is the reduction of bubbles and the control of bubble sweepdown patterns that flow over the acoustic sensors. Design efforts related to problems on earlier ships are reviewed, including the extensive efforts undertaken to minimize bubble sweepdown on the T-AGS 60 PATHFINDER Class. The authors describe the application of earlier US Navy work to the design of NOAA's FRV 40 and how the design takes advantage of many previous hydrodynamic and ship design developments. A discussion of subsequent model tests to verify the design is included.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128804437","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}
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