OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology最新文献_第10页

Modeling the Transport of Noncohesive Sediment 模拟非粘性沉积物的输运

OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology Pub Date : 1992-10-26 DOI: 10.1109/OCEANS.1992.612644

S.R. Mchan

引用次数: 0

Performance Of An MFSK Acoustic Telemetry System MFSK声遥测系统的性能研究

OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology Pub Date : 1992-10-26 DOI: 10.1109/OCEANS.1992.607712

S. Merriam, D. Frye, J. Catipovic

{"title":"Performance Of An MFSK Acoustic Telemetry System","authors":"S. Merriam, D. Frye, J. Catipovic","doi":"10.1109/OCEANS.1992.607712","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.607712","url":null,"abstract":"A low power, medium data rate acoustic telemetry system has been developed at Woods Hole Oceanographic Institution to address a broad range of underwater communication needs. The system utilizes advanced digital signal processing techniques to implement an MFSK telemetry scheme capable of data rates up to 5000 b/s. A series of shallow and deep water tests of this system have been performed over ranges from a few hundred meters to 2500m which allow system performance to be characterized. Operation over the vertical and horizontal channel has been investigated. The paper will provide a system description, summarize the results of the in-water tests and compare the results to the expected theoretical performance of the system in a realistic ocean channel. Typical bit error rates for the acoustic telemetry link over the vertical channel are to lo4 over ranges of 500 to 2.500111 using directional transmit and receive transducers with the receiver hydrophone suspended a short distance below the surface. Performance over the shallow-water horizontal path is about an order of magnitude worse. Recent improvements in link performance using more sophisticated error correction coding will also be reported. dor.","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125426965","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

The Precursor Resolution At The Opto-acoustic Pulse Propagation In The Upper Ocean Layer 光声脉冲在上层海洋中传播的前兆分辨率

OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology Pub Date : 1992-10-26 DOI: 10.1109/OCEANS.1992.607643

V.D. Kiselyov, A. Maksimov

引用次数: 0

Robust Acoustic Communication With Underwater Vehicles In Noisy And Jammed Shallow Water Environments 噪声和阻塞浅水环境下水下航行器的鲁棒声通信

OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology Pub Date : 1992-10-26 DOI: 10.1109/OCEANS.1992.607646

J. Catipovic

{"title":"Robust Acoustic Communication With Underwater Vehicles In Noisy And Jammed Shallow Water Environments","authors":"J. Catipovic","doi":"10.1109/OCEANS.1992.607646","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.607646","url":null,"abstract":"Insit it ution This paper presents a protocol for acoustic communication with autonomous vehicles in shallow water environments, particularly in difficult areas such as harbors and marine work sites where direst point-to-point links are not sufficiently reliable. The protocol is a sequential decoding, code combining, Automatic Repeat :reQuest (ARQ) which makes efficient use of available store and forward transceivers placed in the area of operations. The protocol will attempt to maintain a single point-to-point link between the underwater platform and the data user whenever possible. If conditions deteriorate, the protocol will optimally take advantage of an intermediate store and forward transceiver to maintain uninterrupted communication. It is shown that the use of intermediate transceivers slows down the telemetry throughput slightly, power savings are significant, and a robust data link can be maintained in extremely noisy, reverberant and jammed environments. I will describe the point to point sequential decoding, code combining ARQ protocol for acoustic telemetry and present performance results obtained in Woods Hole harbor and Buzzards Bay. The second half of the presentation will discuss the effects of store and forward transceivers on throughput and power efficiency. I hope to incorporate results of ongoing experiments currently being performed in Buzzardls bay and address the hardware considerations incorporated in our modems and store and forward transceivers. Hardware requirements for the protocol will be presented and our existing hardware prototypes will be described and their performance analyzedi. It is found that while the store and forward protocol requires considerable software complexity, the hardware requirements for implementing the link are quite modest, and are easily met with commercially available digital signal processors.","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114398967","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: 9

Biologically-based Controller For A Shallow Water Walking Machine 基于生物的浅水行走机控制器

OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology Pub Date : 1992-10-26 DOI: 10.1109/OCEANS.1992.607693

J. Ayers, J. Crisman, D. Massa

{"title":"Biologically-based Controller For A Shallow Water Walking Machine","authors":"J. Ayers, J. Crisman, D. Massa","doi":"10.1109/OCEANS.1992.607693","DOIUrl":"https://doi.org/10.1109/OCEANS.1992.607693","url":null,"abstract":"Crustaceans have be'en engineered by evolution to adapt and survive in a :jhallow water hydro-dynamic environment. We have formed a collaboration between biology and engineering to explore how lobsters navigate in shallow waters and to build a shallow water walking robot based on the biological studies. We have formalized the basic structure of this model in terms of central pattern generators, command and coordinating systems. The central pattern generator controls the motion of the leg appropriate to walking in all directions. The coordinating systems controls that gait pattern of the legs. Proprioceptive and exteroceptive reflexes alter the path of a leg or the pattern of coordinated leg motions. We have built a simulator which models the central pattern generator and coordination. It demonstrates basic walking motions in any direction and at multiple speeds with a prototype leg. We are currently building an eight legged terrestrial walking machine based on the morphology of the lobster. In the future we will add more sensing, reflexes, and taxes to our simulator and robot. We plan to implement an underwater version of this robot.","PeriodicalId":158109,"journal":{"name":"OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114748339","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: 1

Observations Of Scholte Wave Dispersion From Measurements At Two Diverse Test Sites 两个不同试验点测量的肖尔特波色散观测

OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology Pub Date : 1992-10-26 DOI: 10.1109/OCEANS.1992.612736

H. Ali, L.D. Etibee, J. Becklehimer

引用次数: 2

Acoustic Source Propagation And Localization In The Norfolk Canyon 诺福克峡谷声源传播与定位

OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology Pub Date : 1992-10-26 DOI: 10.1109/OCEANS.1992.612725

S. M. Bates, B. J. Bates

引用次数: 0

Studying The Kuroshio-Oyashio Frontal Zone By Clustering Original Long-term Observations 利用原始长期观测资料聚类研究黑潮-偏潮锋区

OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology Pub Date : 1992-10-26 DOI: 10.1109/OCEANS.1992.607673

O.O. Trousenkova

引用次数: 1

The Naval Undersea Systems Center Ocean Acoustics Laboratory To Study Ambient Sound Generation By Wind, Waves, And Rainfall 海军海底系统中心海洋声学实验室研究风、浪和降雨产生的环境声

OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology Pub Date : 1992-10-26 DOI: 10.1109/OCEANS.1992.607676

D. Shonting, P. Hebda

引用次数: 0

Acoustic Wideband Techniques For The Remote Estimation Of The Sea Current Velocity 用于海流速度遥感估计的声宽带技术

OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology Pub Date : 1992-10-26 DOI: 10.1109/OCEANS.1992.607653

F. Andreucci, C. Camporeale, F. Fogliuzzi

引用次数: 4