A local area fiber optic network operating at rates above 1.25 Gb/s using LED as the optical transmitter and a novel receiver/clock recovery was developed. A LED driver circuit has been designed to compensate for the bandwidth roll-off of the LED above 500 MHz by means of an active current shaping network. Since the conventional approaches to the receiver/clock recovery circuit consumes power in range of watts, a low power consuming design method is also presented, which extracts the clock signal from ECL compatible data stream above Gb/s. Its performance is evaluated through a 1.25 Gb/s LED-based fiber optic transmission experiment.<>
{"title":"A new approach to the design of LED based Gb/s digital fiber optic link","authors":"J. Lin, A. Daryoush, V. Gershman, W. Rosen","doi":"10.1109/NTC.1994.316687","DOIUrl":"https://doi.org/10.1109/NTC.1994.316687","url":null,"abstract":"A local area fiber optic network operating at rates above 1.25 Gb/s using LED as the optical transmitter and a novel receiver/clock recovery was developed. A LED driver circuit has been designed to compensate for the bandwidth roll-off of the LED above 500 MHz by means of an active current shaping network. Since the conventional approaches to the receiver/clock recovery circuit consumes power in range of watts, a low power consuming design method is also presented, which extracts the clock signal from ECL compatible data stream above Gb/s. Its performance is evaluated through a 1.25 Gb/s LED-based fiber optic transmission experiment.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"42 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":"132409688","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 solid-state phased array technique is introduced where some of the T/R modules each feed a single radiator while other T/R modules each feed multiple radiators. This technique provides higher ERP and gain along with narrower beams than the conventional T/R module per radiator approach for a given number of T/R modules. At the same time the amplitude quantization lobes, associated with an array of subarrays, are greatly reduced.<>
{"title":"Hybrid active arrays","authors":"J. Frank, R. Coffman","doi":"10.1109/NTC.1994.316702","DOIUrl":"https://doi.org/10.1109/NTC.1994.316702","url":null,"abstract":"A solid-state phased array technique is introduced where some of the T/R modules each feed a single radiator while other T/R modules each feed multiple radiators. This technique provides higher ERP and gain along with narrower beams than the conventional T/R module per radiator approach for a given number of T/R modules. At the same time the amplitude quantization lobes, associated with an array of subarrays, are greatly reduced.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"1 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":"128533589","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 novel approach is proposed for direct demodulation of various digitally modulated signals at microwave/millimeter wave frequencies using a six-port phase/frequency discriminator (SPFD). The proposed six-port direct digital receiver is capable of handling PSK and QAM as well as their varieties. Preliminary measurements on demodulation of DBPSK signals at 26.5 GHz, 33 GHz and 40 GHz have revealed great potential of this new receiver.<>
{"title":"A six-port direct digital millimeter wave receiver","authors":"Ji Li, R. Bosisio, K. Wu","doi":"10.1109/NTC.1994.316688","DOIUrl":"https://doi.org/10.1109/NTC.1994.316688","url":null,"abstract":"A novel approach is proposed for direct demodulation of various digitally modulated signals at microwave/millimeter wave frequencies using a six-port phase/frequency discriminator (SPFD). The proposed six-port direct digital receiver is capable of handling PSK and QAM as well as their varieties. Preliminary measurements on demodulation of DBPSK signals at 26.5 GHz, 33 GHz and 40 GHz have revealed great potential of this new receiver.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"26 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":"128727218","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}
Results of two parallel studies-defining future IVHS traffic management systems agree that the most challenging traffic data interpretations and responses will remain the responsibility of human operators. The studies (1) developed a user-centered plan for implementing IVHS technology, and (2) explored examples of human factors pitfalls awaiting the designer who does so.<>
{"title":"Intelligent vehicle-highway systems (IVHS): the 'I' in IVHS is still mostly human intelligence","authors":"M. Kelly, D. Folds","doi":"10.1109/NTC.1994.316654","DOIUrl":"https://doi.org/10.1109/NTC.1994.316654","url":null,"abstract":"Results of two parallel studies-defining future IVHS traffic management systems agree that the most challenging traffic data interpretations and responses will remain the responsibility of human operators. The studies (1) developed a user-centered plan for implementing IVHS technology, and (2) explored examples of human factors pitfalls awaiting the designer who does so.<<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":"117020868","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 frequency multiplier with active linearly tapered slot antennas (LTSAs) has been demonstrated at the second harmonic frequency. In each antenna element, a GaAs monolithic microwave integrated circuit (MMIC) distributed amplifier is integrated with two LTSAs. The multiplier has a very wide bandwidth and large dynamic range. The fundamental-to-second harmonic conversion efficiency is 8.1 percent. The spatially combined second harmonic signal is 50 dB above the noise level. The design is suitable for constructing a large array using monolithic integration techniques.<>
{"title":"Spatial frequency multiplier with active linearly tapered slot antenna array","authors":"R. N. Simons, Richard Q. Lee","doi":"10.1109/NTC.1994.316693","DOIUrl":"https://doi.org/10.1109/NTC.1994.316693","url":null,"abstract":"A frequency multiplier with active linearly tapered slot antennas (LTSAs) has been demonstrated at the second harmonic frequency. In each antenna element, a GaAs monolithic microwave integrated circuit (MMIC) distributed amplifier is integrated with two LTSAs. The multiplier has a very wide bandwidth and large dynamic range. The fundamental-to-second harmonic conversion efficiency is 8.1 percent. The spatially combined second harmonic signal is 50 dB above the noise level. The design is suitable for constructing a large array using monolithic integration techniques.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129664307","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 methodology for modeling discontinuities in a coaxial transmission line is presented. The method uses a non-linear least squares fit program to optimize the fit between a theoretical model and experimental data. When the method was applied for modeling discontinuities in a damaged S-band antenna cable, excellent agreement was obtained.<>
{"title":"A method for modeling discontinuities in a microwave coaxial transmission line","authors":"T. Otoshi","doi":"10.1109/NTC.1994.316650","DOIUrl":"https://doi.org/10.1109/NTC.1994.316650","url":null,"abstract":"A methodology for modeling discontinuities in a coaxial transmission line is presented. The method uses a non-linear least squares fit program to optimize the fit between a theoretical model and experimental data. When the method was applied for modeling discontinuities in a damaged S-band antenna cable, excellent agreement was obtained.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127202866","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}
Summary form only given, as follows. The three segment military satellite communications (Milsatcom) architecture envisioned in the early 1980's now has at least one satellite of each segment on orbit. Each segment is described, focusing on the capability each system provides to the Department of Defense. As we enter the mid-90's the world changes of the past five years dedicate an architectural review process to evaluate this architecture's performance and suggest future evolution. The ongoing MILSATCOM baseline architecture performance analysis is summarized, and some conclusions are presented regarding its implications for post-2000 MILSATCOM.<>
{"title":"Milsatcom architecture","authors":"J. Keller, M. Schwene","doi":"10.1109/NTC.1994.316675","DOIUrl":"https://doi.org/10.1109/NTC.1994.316675","url":null,"abstract":"Summary form only given, as follows. The three segment military satellite communications (Milsatcom) architecture envisioned in the early 1980's now has at least one satellite of each segment on orbit. Each segment is described, focusing on the capability each system provides to the Department of Defense. As we enter the mid-90's the world changes of the past five years dedicate an architectural review process to evaluate this architecture's performance and suggest future evolution. The ongoing MILSATCOM baseline architecture performance analysis is summarized, and some conclusions are presented regarding its implications for post-2000 MILSATCOM.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132042506","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 brief study of history uncovers a precise resemblance between the contemporary emergence of electronics and the invention of the printing press in the 15th century. The printing press marked the beginning of a new era of culture industry which ultimately promoted all major social movements thereafter up to the great industrial revolution of the 18th century. Now the electronics, together with the contemporary light wave technology, is flourishing to mark the opening of another great era of culture industry. This new revolution, spanning over three centuries, is culminating in the ultimate integration of telecommunication, television, extremely large databases and computers, to form an Advanced Culture Information System of both global and personal nature. The appearance of human culture life will be totally transformed and will become far more magnificent than it is now.<>
{"title":"Electronics as new revolutionary factor in culture industry","authors":"P. Luo","doi":"10.1109/NTC.1994.316679","DOIUrl":"https://doi.org/10.1109/NTC.1994.316679","url":null,"abstract":"A brief study of history uncovers a precise resemblance between the contemporary emergence of electronics and the invention of the printing press in the 15th century. The printing press marked the beginning of a new era of culture industry which ultimately promoted all major social movements thereafter up to the great industrial revolution of the 18th century. Now the electronics, together with the contemporary light wave technology, is flourishing to mark the opening of another great era of culture industry. This new revolution, spanning over three centuries, is culminating in the ultimate integration of telecommunication, television, extremely large databases and computers, to form an Advanced Culture Information System of both global and personal nature. The appearance of human culture life will be totally transformed and will become far more magnificent than it is now.<<ETX>>","PeriodicalId":297184,"journal":{"name":"Proceedings of IEEE National Telesystems Conference - NTC '94","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126042757","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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