Since the 1970s, awareness, interest, and emphasis in the testability discipline have been increasing. This discipline is an extension of system design, reliability assessment, and test engineering and is an increasingly important part of Integrated Product Development (IPD) teams. An integral part of an IPD team is the test designer, whose goal is to determine optimum test strategies. To be effective, the test designer must have automated tools and processes available for developing these strategies, which, when implemented, enable Program and Production Managers to control logistics costs directly attributable to maintenance. The purpose of this paper is to define the tools and processes designed by ARINC for optimizing diagnostic strategies.<>
{"title":"Integrated intelligent fault diagnostics","authors":"G. C. Hadfield, C.M. Cigich","doi":"10.1109/NTC.1994.316648","DOIUrl":"https://doi.org/10.1109/NTC.1994.316648","url":null,"abstract":"Since the 1970s, awareness, interest, and emphasis in the testability discipline have been increasing. This discipline is an extension of system design, reliability assessment, and test engineering and is an increasingly important part of Integrated Product Development (IPD) teams. An integral part of an IPD team is the test designer, whose goal is to determine optimum test strategies. To be effective, the test designer must have automated tools and processes available for developing these strategies, which, when implemented, enable Program and Production Managers to control logistics costs directly attributable to maintenance. The purpose of this paper is to define the tools and processes designed by ARINC for optimizing diagnostic strategies.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"81 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":"117176514","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}
The paper describes the new technologies in the Advanced Communications Technology Satellite (ACTS), and their relevance to today's burgeoning field of digital communications, with applications ranging from voice telephony to gigahertz channels for supercomputer interconnections. The ACTS satellite was developed and built by Martin Marietta under contract to the NASA Lewis Research Center and launched on the Space Shuttle in September 1993. Its purpose is to maintain US leadership in satellite communications. ACTS provides an on-orbit digital communications laboratory available, free of charge, to US industry, academia and government agencies in order to conduct experiments in digital communications to help in defining future systems. The paper also discusses the types of experiments, the agencies conducting them, and the equipment that has been developed to conduct them.<>
{"title":"ACTS-a communications system for the future","authors":"F. Gargione","doi":"10.1109/NTC.1994.316668","DOIUrl":"https://doi.org/10.1109/NTC.1994.316668","url":null,"abstract":"The paper describes the new technologies in the Advanced Communications Technology Satellite (ACTS), and their relevance to today's burgeoning field of digital communications, with applications ranging from voice telephony to gigahertz channels for supercomputer interconnections. The ACTS satellite was developed and built by Martin Marietta under contract to the NASA Lewis Research Center and launched on the Space Shuttle in September 1993. Its purpose is to maintain US leadership in satellite communications. ACTS provides an on-orbit digital communications laboratory available, free of charge, to US industry, academia and government agencies in order to conduct experiments in digital communications to help in defining future systems. The paper also discusses the types of experiments, the agencies conducting them, and the equipment that has been developed to conduct them.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"49 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":"127114467","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}
Presents a methodology for the design and evaluation of scheduling algorithms for a multifunction radar. First we propose a multifunction radar model as basic tool for algorithm evaluation. We establish the main subsystems and perform a thorough analysis. Finally, we present a new dynamic scheduler algorithm based on pulse packing techniques and a collection of performance figures.<>
{"title":"Approach to multifunction radar scheduling simulation","authors":"A. Izquierdo-Fuente, J. Casar-Corredera","doi":"10.1109/NTC.1994.316691","DOIUrl":"https://doi.org/10.1109/NTC.1994.316691","url":null,"abstract":"Presents a methodology for the design and evaluation of scheduling algorithms for a multifunction radar. First we propose a multifunction radar model as basic tool for algorithm evaluation. We establish the main subsystems and perform a thorough analysis. Finally, we present a new dynamic scheduler algorithm based on pulse packing techniques and a collection of performance figures.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"31 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":"126309010","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}
Since the close of the Cold War, TBMD has taken-on a new focus land and ship board missile fire control systems are being stretched to provide effective area defense against longer and longer range ballistic missiles. As part of a National Security Industrial Association (NSIA) initiative for N8, a generic study was conducted to determine the role, if any, of Airborne IR technology in TBMD. This paper updates the NSIA study to 1994, including the current state of affairs relative to missile fire control cuing.<>
{"title":"Airborne IRST system application to tactical ballistic missile defense (TBMD)","authors":"Martin G. O'Connor","doi":"10.1109/NTC.1994.316698","DOIUrl":"https://doi.org/10.1109/NTC.1994.316698","url":null,"abstract":"Since the close of the Cold War, TBMD has taken-on a new focus land and ship board missile fire control systems are being stretched to provide effective area defense against longer and longer range ballistic missiles. As part of a National Security Industrial Association (NSIA) initiative for N8, a generic study was conducted to determine the role, if any, of Airborne IR technology in TBMD. This paper updates the NSIA study to 1994, including the current state of affairs relative to missile fire control cuing.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"6 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":"128336138","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}
An advanced architecture has been developed for telesystem applications. It features emerging network communication concepts and modern man/machine interfaces integrated with recent advances in autonomous intelligent control. Details of the architecture are presented. Recent and potential future applications are described.<>
{"title":"An advanced architecture for telesystems applications","authors":"L. Schooley, J. Reagan","doi":"10.1109/NTC.1994.316678","DOIUrl":"https://doi.org/10.1109/NTC.1994.316678","url":null,"abstract":"An advanced architecture has been developed for telesystem applications. It features emerging network communication concepts and modern man/machine interfaces integrated with recent advances in autonomous intelligent control. Details of the architecture are presented. Recent and potential future applications are described.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"12 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":"131213768","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}
The ACTS (Advanced Communications Technology Satellite) has been in geostationary orbit since September 1993. This NASA "test bed" supports industry's and research laboratories' development and validation of advanced communication techniques. Key features of ACTS, which operates in the 20 and 30 GHz spectrum, are summarized, as are typical experiments, with particular emphasis on the unique propagation characteristics encountered. Latest data obtained is presented and its potential value to compensating for signal fading is discussed.<>
{"title":"ACTS propagation research-a key to increased satellite communication capacity","authors":"R. Henning, R. Bauer, F. Davarian, H. Helmken","doi":"10.1109/NTC.1994.316659","DOIUrl":"https://doi.org/10.1109/NTC.1994.316659","url":null,"abstract":"The ACTS (Advanced Communications Technology Satellite) has been in geostationary orbit since September 1993. This NASA \"test bed\" supports industry's and research laboratories' development and validation of advanced communication techniques. Key features of ACTS, which operates in the 20 and 30 GHz spectrum, are summarized, as are typical experiments, with particular emphasis on the unique propagation characteristics encountered. Latest data obtained is presented and its potential value to compensating for signal fading is discussed.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"266 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":"134250478","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}
S. Lichten, B. Haines, L. Young, J. Srinivasan, D. Sweeney, D. Spitzmesser, S. Stephens, C. Dunn
The Global Positioning System (GPS) can play a major role in supporting orbit and trajectory determination for spacecraft in a wide range of applications, including low-Earth, high-Earth, and even deep space (interplanetary) tracking. This paper summarizes recent results demonstrating these unique and far-ranging applications of GPS.<>
{"title":"Using the Global Positioning System for Earth orbiter and deep space tracking","authors":"S. Lichten, B. Haines, L. Young, J. Srinivasan, D. Sweeney, D. Spitzmesser, S. Stephens, C. Dunn","doi":"10.1109/NTC.1994.316682","DOIUrl":"https://doi.org/10.1109/NTC.1994.316682","url":null,"abstract":"The Global Positioning System (GPS) can play a major role in supporting orbit and trajectory determination for spacecraft in a wide range of applications, including low-Earth, high-Earth, and even deep space (interplanetary) tracking. This paper summarizes recent results demonstrating these unique and far-ranging applications of GPS.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"11 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":"126445833","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}
A circuit that uses electronically variable time delay elements to suppress interfering signals on the basis of their difference-in-time-of-arrival at two spatially separated antennas is described. 40 dB of suppression of wideband interferers was demonstrated in cases where strong, wideband interferers overlapped the frequency of the desired signal, and where the difference in the difference-in-time-of-arrival of interferers and desired signals was as small as 30 picoseconds.<>
{"title":"Suppression of multipath and other interferers using electronically variable time delay elements","authors":"R. E. Askew, D. Mawhinney, F. Sterzer","doi":"10.1109/NTC.1994.316685","DOIUrl":"https://doi.org/10.1109/NTC.1994.316685","url":null,"abstract":"A circuit that uses electronically variable time delay elements to suppress interfering signals on the basis of their difference-in-time-of-arrival at two spatially separated antennas is described. 40 dB of suppression of wideband interferers was demonstrated in cases where strong, wideband interferers overlapped the frequency of the desired signal, and where the difference in the difference-in-time-of-arrival of interferers and desired signals was as small as 30 picoseconds.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"51 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":"117194501","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}
The APALS system is a precision approach and landing system designed to enable low visibility landings at many more airports than is now possible. It is an autonomous navigation system which uses standard avionics equipment to determine the aircraft position and altitude with respect to unique features over which the aircraft flies, The primary measurement is made with the aircraft's weather radar and provides the range and range rate information necessary to update the precision navigation system. The system makes use of stored terrain map data as references for map matching with synthetic aperture radar (SAR) maps.<>
{"title":"Autonomous precision approach and landing system APALS","authors":"K. Loss, J. Nicosia, G. Taylor","doi":"10.1109/NTC.1994.316662","DOIUrl":"https://doi.org/10.1109/NTC.1994.316662","url":null,"abstract":"The APALS system is a precision approach and landing system designed to enable low visibility landings at many more airports than is now possible. It is an autonomous navigation system which uses standard avionics equipment to determine the aircraft position and altitude with respect to unique features over which the aircraft flies, The primary measurement is made with the aircraft's weather radar and provides the range and range rate information necessary to update the precision navigation system. The system makes use of stored terrain map data as references for map matching with synthetic aperture radar (SAR) maps.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"381 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":"122782892","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}
The paper describes a methodology for increasing digital satellite transmission throughput data rate by a factor of 2 over current practice (expanding from 1.5 to 3 bits per second per hertz of bandpass) and at the same time lessening the (E/sub bN/sub o/) penalty paid for higher order (3 and 4 bit per symbol) modulation waveforms by judicious application of forward error correction codes. This approach allows satellite transmitters to be driven into their high efficiency operating region at or near saturation. The high bandwidth efficiency is achieved by using higher order modulations (8-ary and 16-ary), precompensation of the signal to induce distortion complementary to that anticipated downstream in the channel, forward error correction coding, and adaptive equalization in the receiver. The recommended FEC, incurring about 10% overhead, can yield error rates on the order of 10/sup -8/ for channel error rate between 8x10/sup -3/. Error rates in the range of 10/sup -8/ to 10/sup -9/ are practical with channel error rates of 4xl0/sup -3/. Operating at high error rates allows the channel to be operated in a region where small to medium distortions, which could be fatal at low error rates, are tolerable. This, along with precompensation for the nonlinear effects, allows the TWTA to be operated at or near saturation.<>
{"title":"System approaches and technologies for satellite data microwave transmission approaching 8 gigabits per second","authors":"F. Chethik, F. J. Smith, R. Koralek","doi":"10.1109/NTC.1994.316665","DOIUrl":"https://doi.org/10.1109/NTC.1994.316665","url":null,"abstract":"The paper describes a methodology for increasing digital satellite transmission throughput data rate by a factor of 2 over current practice (expanding from 1.5 to 3 bits per second per hertz of bandpass) and at the same time lessening the (E/sub bN/sub o/) penalty paid for higher order (3 and 4 bit per symbol) modulation waveforms by judicious application of forward error correction codes. This approach allows satellite transmitters to be driven into their high efficiency operating region at or near saturation. The high bandwidth efficiency is achieved by using higher order modulations (8-ary and 16-ary), precompensation of the signal to induce distortion complementary to that anticipated downstream in the channel, forward error correction coding, and adaptive equalization in the receiver. The recommended FEC, incurring about 10% overhead, can yield error rates on the order of 10/sup -8/ for channel error rate between 8x10/sup -3/. Error rates in the range of 10/sup -8/ to 10/sup -9/ are practical with channel error rates of 4xl0/sup -3/. Operating at high error rates allows the channel to be operated in a region where small to medium distortions, which could be fatal at low error rates, are tolerable. This, along with precompensation for the nonlinear effects, allows the TWTA to be operated at or near saturation.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"36 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":"123385584","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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