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Conference Proceedings National Telesystems Conference 1993最新文献

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On the processing gain and pulse compression ratio of frequency hopping spread spectrum waveforms 跳频扩频波形的处理增益和脉冲压缩比
Conference Proceedings National Telesystems Conference 1993 Pub Date : 1993-06-16 DOI: 10.1109/NTC.1993.292983
M.C. Walden, R. Pollard
{"title":"On the processing gain and pulse compression ratio of frequency hopping spread spectrum waveforms","authors":"M.C. Walden, R. Pollard","doi":"10.1109/NTC.1993.292983","DOIUrl":"https://doi.org/10.1109/NTC.1993.292983","url":null,"abstract":"The authors consider the pulse compression ratio and processing gain of frequency hopping spread spectrum waveforms. The importance of the frequency separation-subpulse width product is studied. Typical autocorrelation functions for coherent and noncoherent frequency hopping systems are given.<<ETX>>","PeriodicalId":238680,"journal":{"name":"Conference Proceedings National Telesystems Conference 1993","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125156131","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
MMW technology for enhanced situation awareness/enhanced vision systems 用于增强态势感知/增强视觉系统的毫米波技术
Conference Proceedings National Telesystems Conference 1993 Pub Date : 1993-06-16 DOI: 10.1109/NTC.1993.293002
T. W. Bradley, M. Autry, L. Hui
{"title":"MMW technology for enhanced situation awareness/enhanced vision systems","authors":"T. W. Bradley, M. Autry, L. Hui","doi":"10.1109/NTC.1993.293002","DOIUrl":"https://doi.org/10.1109/NTC.1993.293002","url":null,"abstract":"Millimeter wave (MMW) radar systems are now demonstrating the ability to image airport environments in fog. The authors discuss the use of MMW radar technology to provide pilots with enhanced vision and enhanced situation awareness. One of the first steps in providing an autonomous aircraft is the Enhanced Vision System (EVS). This system consists of a heads-up display (HUD) and an imaging MMW radar that provides the pilot with runway imagery on the HUD. Hughes Aircraft Co. has developed a MMW radar designed specifically for the EVS application. This radar was designed to provide the range, resolution, accuracy, update rate, and safety monitoring functions required to meet the demanding Category III FAA certification requirements. The Hughes MMW radar comprises three subsystems: the processor, transceiver and antenna. The radar is currently undergoing testing. To test the radar's ability to compensate for aircraft motion and provide real-time imagery, a dynamic platform was used to simulate aircraft motion.<<ETX>>","PeriodicalId":238680,"journal":{"name":"Conference Proceedings National Telesystems Conference 1993","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134096936","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
Application of aerostat radars to drug interdiction 浮空器雷达在禁毒中的应用
Conference Proceedings National Telesystems Conference 1993 Pub Date : 1993-06-16 DOI: 10.1109/NTC.1993.292989
J. Bruder, E. Greneker, D. Danckwerth
{"title":"Application of aerostat radars to drug interdiction","authors":"J. Bruder, E. Greneker, D. Danckwerth","doi":"10.1109/NTC.1993.292989","DOIUrl":"https://doi.org/10.1109/NTC.1993.292989","url":null,"abstract":"The application of aerostat radars for the purpose of detecting and tracking low flying aircraft and small ships used for drug smuggling is an example of an application of technology to nonmilitary purposes. Sophisticated coherent radars that include moving target indication (MTI) and pulse compression processing to achieve the target extraction from clutter have been adapted from military coherent radars. The Georgia Tech Research Institute (GTRI) is reviewing the design of the aerostat radar and is tasked to perform field test measurements to verify the achievement of the clutter rejection ratios. GTRI has developed a special calibrated Doppler producing target, as well as a large stationary target, for testing MTI performance of the aerostat radars. One of the factors critical in evaluating the MTI performance is that of accounting for the effects of multipath interference on the measurements. GTRI is planning to use a refined measurement method with a field probe to characterize the effects of multipath interference and insert the field probe results into a GTRI model to correct for the effects of multipath interference.<<ETX>>","PeriodicalId":238680,"journal":{"name":"Conference Proceedings National Telesystems Conference 1993","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124571124","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
Receiver frequency resolution for range resolution in homodyne FMCW radar 零差FMCW雷达距离分辨率中的接收机频率分辨率
Conference Proceedings National Telesystems Conference 1993 Pub Date : 1993-06-16 DOI: 10.1109/NTC.1993.292991
S.O. Piper
{"title":"Receiver frequency resolution for range resolution in homodyne FMCW radar","authors":"S.O. Piper","doi":"10.1109/NTC.1993.292991","DOIUrl":"https://doi.org/10.1109/NTC.1993.292991","url":null,"abstract":"The author presents an analysis and simulation results relating the range resolution to the receiver frequency resolution in a linear frequency modulated, continuous wave, (FMCW) homodyne radar. He considers the relationship between range resolution and receiver frequency resolution for systems that use the fast Fourier transform (FFT) to form multiple frequency and range bins. A millimeter wave (MMW) seeker application is used as an example.<<ETX>>","PeriodicalId":238680,"journal":{"name":"Conference Proceedings National Telesystems Conference 1993","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125969670","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: 41
Applications of the global positioning system to intelligent vehicle highway systems 全球定位系统在智能车辆公路系统中的应用
Conference Proceedings National Telesystems Conference 1993 Pub Date : 1993-06-16 DOI: 10.1109/NTC.1993.292995
D. Chadwick
{"title":"Applications of the global positioning system to intelligent vehicle highway systems","authors":"D. Chadwick","doi":"10.1109/NTC.1993.292995","DOIUrl":"https://doi.org/10.1109/NTC.1993.292995","url":null,"abstract":"The Intelligent Vehicle Highway System (IVHS) program is aimed at reducing traffic congestion and motor vehicle emissions, and at improving highway safety, by applying advanced communications and computer technologies. The author examines the user requirements and system functions contemplated for IVHS, and discusses the surveillance and navigation services that are required to support them. Comparisons are made between IVHS requirements and global positioning system (GPS) services in terms of accuracy and availability. Differential GPS and use of GPS pseudolites are covered. GPS integrity, as it affects IVHS applications, is addressed. The communications system issues and system architecture implications that arise from the use of GPS in IVHS are discussed as well.<<ETX>>","PeriodicalId":238680,"journal":{"name":"Conference Proceedings National Telesystems Conference 1993","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125562260","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
GPS relative navigation for automatic spacecraft rendezvous and capture 用于航天器自动交会与捕获的GPS相对导航
Conference Proceedings National Telesystems Conference 1993 Pub Date : 1993-06-16 DOI: 10.1109/NTC.1993.292992
J.I. Galdos, T. Upadhyay, A. Deaton, J. J. Lomas
{"title":"GPS relative navigation for automatic spacecraft rendezvous and capture","authors":"J.I. Galdos, T. Upadhyay, A. Deaton, J. J. Lomas","doi":"10.1109/NTC.1993.292992","DOIUrl":"https://doi.org/10.1109/NTC.1993.292992","url":null,"abstract":"NASA, in collaboration with the European Space Agency (ESA), is planning a space experiment involving the space shuttle and two spacecraft in low Earth orbit to demonstrate autonomous rendezvous and capture (AR&C). The results of the preliminary design of a global positioning system (GPS)-based relative navigation filter for AR&C are presented. The domain of operation of the GPS relative navigation filter considered here is from a 2-km separation to 100-m proximity operation. The authors describe the navigation filter algorithm, the truth models employed in the evaluation of filter performance, and the results of the performance evaluation. Relative navigation filter performance results obtained by simulation show a relative position accuracy of about 2 m (1- sigma ) in the presence of selective availability (SA) errors. In contrast, the performance of the more traditional state vector difference (SVD) method is shown to fluctuate in the 10-20-m range. The results obtained demonstrate that the filter developed provides higher relative navigation accuracy and greater immunity to transients than the SVD approach.<<ETX>>","PeriodicalId":238680,"journal":{"name":"Conference Proceedings National Telesystems Conference 1993","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121622751","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
Synthetic vision/enhanced vision system implementation 合成视觉/增强视觉系统实现
Conference Proceedings National Telesystems Conference 1993 Pub Date : 1993-06-16 DOI: 10.1109/NTC.1993.293003
D. Ferguson, J. Radke
{"title":"Synthetic vision/enhanced vision system implementation","authors":"D. Ferguson, J. Radke","doi":"10.1109/NTC.1993.293003","DOIUrl":"https://doi.org/10.1109/NTC.1993.293003","url":null,"abstract":"There is an emerging requirement within the world's air transport network to improve safety and increase productivity by enabling aircraft to perform visual flight operations under low-visibility weather conditions. Currently, the commercial aviation industry has centered its efforts at achieving this requirement around a millimeter-wave imaging radar and/or imaging infrared (IR) sensor, a Global Positioning System (GPS)-aided inertial navigation system, and a heads-up-display (HUD) to enable a minimum set of low-visibility functions. Honeywell has flight tested a 35-GHz radar as part of the Synthetic Vision System Technology Demonstration (SVSTD) program, and the authors describe the system implementation, signal processing, and resulting flight test results. The focus is on the terminal area navigation and landing problem in adverse weather using existing avionics with appropriate sensor and navigation upgrades.<<ETX>>","PeriodicalId":238680,"journal":{"name":"Conference Proceedings National Telesystems Conference 1993","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131272251","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: 8
A versatile, broadband, low-profile antenna 一种多功能、宽带、低调的天线
Conference Proceedings National Telesystems Conference 1993 Pub Date : 1993-06-16 DOI: 10.1109/NTC.1993.292981
V. Tripp, J. Wang, J. Tillery, C. Chambers, G. Hirvela
{"title":"A versatile, broadband, low-profile antenna","authors":"V. Tripp, J. Wang, J. Tillery, C. Chambers, G. Hirvela","doi":"10.1109/NTC.1993.292981","DOIUrl":"https://doi.org/10.1109/NTC.1993.292981","url":null,"abstract":"The recently invented spiral-mode microstrip (SMM) antenna is finding application in various commercial systems as well as various military systems in addition to the military application for which it was developed. The salient features of this antenna are reviewed with respect to those applications for which interest in the antenna has been strongest. The salient features of the new antenna are broad bandwidth, low profile and high efficiency. All applications identified need, or at least prefer, a low-profile, unobtrusive antenna. When this requirement is coupled with the need for, or advantages of, broad bandwidth, the SMM antenna is needed. There are significant advantages to broad bandwidth even for those applications that cover a modest band. Bandwidth advantages are summarized.<<ETX>>","PeriodicalId":238680,"journal":{"name":"Conference Proceedings National Telesystems Conference 1993","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128910467","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
The Motion Pictures Experts Group digital compression standard and its role in satellite systems 电影专家组数字压缩标准及其在卫星系统中的作用
Conference Proceedings National Telesystems Conference 1993 Pub Date : 1993-06-16 DOI: 10.1109/NTC.1993.292999
F. Laczko
{"title":"The Motion Pictures Experts Group digital compression standard and its role in satellite systems","authors":"F. Laczko","doi":"10.1109/NTC.1993.292999","DOIUrl":"https://doi.org/10.1109/NTC.1993.292999","url":null,"abstract":"The author discusses the general scope of audio and video compression and what role the Motion Pictures Experts Group (MPEG) standard has played in its development. The MPEG standard began in 1988 as an effort of the International Organization for Standardization (ISO) to develop a working standard for encoding and decoding compressed digital video. MPEG is also specifically addressed within the context of how it will be used in satellite systems. Texas Instruments' involvement in the digital compression area is described.<<ETX>>","PeriodicalId":238680,"journal":{"name":"Conference Proceedings National Telesystems Conference 1993","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130291358","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
The search and rescue communications channel-past, present and future 过去、现在和未来的搜救通讯频道
Conference Proceedings National Telesystems Conference 1993 Pub Date : 1993-06-16 DOI: 10.1109/NTC.1993.292996
R. Renner
{"title":"The search and rescue communications channel-past, present and future","authors":"R. Renner","doi":"10.1109/NTC.1993.292996","DOIUrl":"https://doi.org/10.1109/NTC.1993.292996","url":null,"abstract":"From a macroscopic viewpoint, the underlying concept for search and rescue (SAR) involving radio beacons is a communications channel. The communications channel should establish a two-way link by providing confirmation of the message received. The author outlines the different aspects of the SAR communications channel from its very beginnings to the current COSPAS-SARSAT satellite system, and he attempts to predict its evolution into the next century. The first SAR communications channel was instituted with legislation mandating the installation of 121.5-MHz emergency locator transmitters (ELTs) or crash position indicators (CPIs) on all aircraft. Improvements in the communications channel through faster detection of the ELT and better location accuracy were made. The world's first prototype local user terminal (LUT) was introduced in the late 1970s. This is a satellite receiving station designed explicitly for the SAR communications channel. The LUT itself now detects and locates the beacon transmitter. A global communications network, specifically for SAR data, should eventually emerge.<<ETX>>","PeriodicalId":238680,"journal":{"name":"Conference Proceedings National Telesystems Conference 1993","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127898896","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
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