发布求助
文献互助 智能选刊 最新文献

Proceedings of IEEE National Telesystems Conference - NTC '94最新文献

筛选
英文 中文
The Teledesic satellite system Teledesic卫星系统
Proceedings of IEEE National Telesystems Conference - NTC '94 Pub Date : 1994-05-26 DOI: 10.1109/NTC.1994.316677
M. Sturza
{"title":"The Teledesic satellite system","authors":"M. Sturza","doi":"10.1109/NTC.1994.316677","DOIUrl":"https://doi.org/10.1109/NTC.1994.316677","url":null,"abstract":"There is a significant worldwide demand for broadband communications capacity. Teledesic plans to meet this demand using a constellation of 924 low-Earth orbit (LEG) satellites operating in Ka-band (30/20 GHz). The Teledesic constellation incorporates over 100000 active-element phased-array antennas. Subscriber terminals will account for an additional 20 million antennas. The Teledesic network will be one of the major consumers of Ka-band GaAs MMICs in the late 1990's. Economies of scale will result in a low per subscriber cost.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"244 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115096894","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: 16
Emulating a space relay based system for satellite command and control using the NASA ACTS satellite and VSATs 利用NASA ACTS卫星和vsat模拟基于空间中继的卫星指挥和控制系统
Proceedings of IEEE National Telesystems Conference - NTC '94 Pub Date : 1994-05-26 DOI: 10.1109/NTC.1994.316666
F. Chethik, A. Reichner, T. Larson
{"title":"Emulating a space relay based system for satellite command and control using the NASA ACTS satellite and VSATs","authors":"F. Chethik, A. Reichner, T. Larson","doi":"10.1109/NTC.1994.316666","DOIUrl":"https://doi.org/10.1109/NTC.1994.316666","url":null,"abstract":"The paper describes the operational concept of a demonstration of a system for emulating satellite cross link communications for command and control operations. As a possible future implementation of the USAF Satellite Control Network (AFSCN), connectivity to low Earth orbiting (LEO) satellites may in the future be accomplished through synchronous relay satellites and not through the current terrestrial remote tracking station network. The space-based architecture studies, and the development of a demonstration system are both sponsored by the USAF.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"370 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132829943","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: 3
Active array radar systems applied to air traffic control 有源阵列雷达系统在空中交通管制中的应用
Proceedings of IEEE National Telesystems Conference - NTC '94 Pub Date : 1994-05-26 DOI: 10.1109/NTC.1994.316700
T. Brukiewa
{"title":"Active array radar systems applied to air traffic control","authors":"T. Brukiewa","doi":"10.1109/NTC.1994.316700","DOIUrl":"https://doi.org/10.1109/NTC.1994.316700","url":null,"abstract":"Increased traffic flow, mobility, safety, and decreasing T/R module costs, will lead the way for future air traffic control (ATC) radar systems to be based on GaAs active array radar (AAR) technology. In this paper, system tradeoffs and potential architectures are described for civil ATC radars and mobile military ATC radars. Current developments are provided in transmit-receive (T/R) module state of the art, the enabling technology. Discussions include the potential for large AARs with single or multiple arrays located at airport terminals to simultaneously undertake functions presently performed by the airport surveillance radar (ASR), the precision approach radar (PAR), the terminal Doppler weather radar (TDWR), and the airport surface detection equipment (ASDE) radars for increased performance at lower cost. These features are accomplished through the beam agility, wide bandwidth, multimode adaptive waveforms and power programming features only possible with the AAR.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133621876","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: 11
Improved TCP error control for heterogeneous WANs 改进了异构广域网的TCP错误控制
Proceedings of IEEE National Telesystems Conference - NTC '94 Pub Date : 1994-05-26 DOI: 10.1109/NTC.1994.316647
M. Jolfaei, B. Heinrichs, M.R. Nazeman
{"title":"Improved TCP error control for heterogeneous WANs","authors":"M. Jolfaei, B. Heinrichs, M.R. Nazeman","doi":"10.1109/NTC.1994.316647","DOIUrl":"https://doi.org/10.1109/NTC.1994.316647","url":null,"abstract":"Considers the internet transport protocol TCP for interconnection of Ethernets by satellite. Such an environment is an appropriate representative of currently available wide area networks. In this context, several approaches for extending TCP for use in a bandwidth-delay dominated network are considered. These are in particular the window scale, the NAK, the selective repeat and the Stutter XOR selective repeat option. A supplementary problem which arises in a satellite network is the differentiation of data losses due to congestion or noise. If a connection loses a packet due to the medium (a packet corrupted by an error), no congestion control is necessary. On the other hand, if a packet was dropped due to an overloading of limited resources in the network, congestion control has to be applied in order to give the network a chance to clear up. The simulative results show that in terms of performance the extensions and modifications yield remarkably better results than pure TCP.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124813303","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
Road surface classification by using a polarimetric coherent radar module at millimeter waves 利用毫米波偏振相干雷达模块进行路面分类
Proceedings of IEEE National Telesystems Conference - NTC '94 Pub Date : 1994-05-26 DOI: 10.1109/NTC.1994.316684
N. Kees, J. Detlefsen
{"title":"Road surface classification by using a polarimetric coherent radar module at millimeter waves","authors":"N. Kees, J. Detlefsen","doi":"10.1109/NTC.1994.316684","DOIUrl":"https://doi.org/10.1109/NTC.1994.316684","url":null,"abstract":"In this paper we report on a prototype system, which is able to detect the road condition. A coherent polarisation-sensitive millimeterwave sensor, which measures the complete backscattering matrix (amplitude and phase) was built at 61 GHz and tested in a standard car under real traffic conditions. The deduced polarisation information was compared with reference characteristics obtained from previous measurements. For a limited number of surfaces it is shown that the type of surface layer can be reliably predicted. The information can be used to inform the driver about critical road situations, e.g. aquaplaning, snow and icy surfaces.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129468238","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: 15
Odyssey-personal communications for the future 奥德赛——未来的个人通信
Proceedings of IEEE National Telesystems Conference - NTC '94 Pub Date : 1994-05-26 DOI: 10.1109/NTC.1994.316673
P. Mock
{"title":"Odyssey-personal communications for the future","authors":"P. Mock","doi":"10.1109/NTC.1994.316673","DOIUrl":"https://doi.org/10.1109/NTC.1994.316673","url":null,"abstract":"Odyssey is a satellite based communication system bringing world-wide communications ability to the palm of a person's hand. The system operates with domestic public switched telephone and cellular networks to allow an individual to communicate with another individual anywhere in the world. A dual-mode handset allows the user to communicate either through local cellular networks, when available, or through the Odyssey system when cellular is not present. The Odyssey satellite constellation operates in medium Earth orbit approximately one-third of the way to geosynchronous orbit to minimize voice time delays and provide populated land mass coverage with only 12 satellites. The sixteen Odyssey earth stations and associated gateways to the PSTNs interconnect mobile and fixed users around the world via the \"bent-pipe\" satellite transponders.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122640627","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
System modeling and analysis: an approach and applications 系统建模和分析:一种方法和应用
Proceedings of IEEE National Telesystems Conference - NTC '94 Pub Date : 1994-05-26 DOI: 10.1109/NTC.1994.316692
M. Schultz, B. Teague
{"title":"System modeling and analysis: an approach and applications","authors":"M. Schultz, B. Teague","doi":"10.1109/NTC.1994.316692","DOIUrl":"https://doi.org/10.1109/NTC.1994.316692","url":null,"abstract":"Summary form only given. Modeling a system in order to gain insight into its behavior is typically considered only when the system's dynamic behavior is too complex for intuition, analytic techniques, or other forecasting methods to suffice. In addition to addressing the inherent systemic complexity implied by the fact that a simulation is being considered, a modeling team must concurrently address the difficulties of a software development effort.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114667165","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
A novel energy management telecontroller system for a modern home 一种新型的现代家庭能源管理遥控系统
Proceedings of IEEE National Telesystems Conference - NTC '94 Pub Date : 1994-05-26 DOI: 10.1109/NTC.1994.316676
H. Amir, J. Gavan
{"title":"A novel energy management telecontroller system for a modern home","authors":"H. Amir, J. Gavan","doi":"10.1109/NTC.1994.316676","DOIUrl":"https://doi.org/10.1109/NTC.1994.316676","url":null,"abstract":"A novel energy management telecontroller system is developed for modern homes based on power line communication at a central frequency of 125 KHz. The system consists of one central telecontroller unit (CTU) and up to 256 device controller units (DCUs). The operation range is around 100 m and can be extended using relay units. The telecontroller parameters are analyzed, samples of its operation mode are described and its important features are discussed.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126370945","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
Unmanned ground vehicle Demonstration II program 无人地面车辆演示II计划
Proceedings of IEEE National Telesystems Conference - NTC '94 Pub Date : 1994-05-26 DOI: 10.1109/NTC.1994.316671
S. Munkeby, C. Shoemaker, W. Chun
{"title":"Unmanned ground vehicle Demonstration II program","authors":"S. Munkeby, C. Shoemaker, W. Chun","doi":"10.1109/NTC.1994.316671","DOIUrl":"https://doi.org/10.1109/NTC.1994.316671","url":null,"abstract":"The military has a requirement for a remotely controlled ground system to perform reconnaissance, surveillance, target acquisition, patrolling, and nuclear, biological, chemical detection. The primary goal of the unmanned ground vehicle (UGV) Demonstration II program is to demonstrate advanced technologies such as the utility of semiautonomous navigation in a military situation. The system is based on four high-mobility, multipurpose wheeled vehicles equipped with perception and navigation subsystems capable of performing onroad and offroad operations.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127764898","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: 3
Expendable fiber optic microcable. A mature technology to support communications with advanced undersea platforms 消耗性光纤微电缆。支持与先进海底平台通信的成熟技术
Proceedings of IEEE National Telesystems Conference - NTC '94 Pub Date : 1994-05-26 DOI: 10.1109/NTC.1994.316669
S. Cowen
{"title":"Expendable fiber optic microcable. A mature technology to support communications with advanced undersea platforms","authors":"S. Cowen","doi":"10.1109/NTC.1994.316669","DOIUrl":"https://doi.org/10.1109/NTC.1994.316669","url":null,"abstract":"A miniature fiber optic cable design which is so tiny (0.8 mm diameter) that it has been designated Fiber Optic Microcable (FOMC) was developed by the Naval Command Control Ocean Surveillance Center (NCCOSC) to replace the expendable metallic wireguides employed to communicate with underwater weapons. The technology has found broad application as an expendable tether for unmanned underwater vehicles and has the potential for numerous civilian uses. FOMC is an excellent example of a military-developed, dual-use technology which is available for civilian applications via technology transfer from a Navy Laboratory.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129066991","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
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信