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IEEE International Conference on Communications, Including Supercomm Technical Sessions最新文献

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Hybrid system of communication and radio determination using two geostationary satellites 使用两颗地球同步卫星的通信和无线电测定混合系统
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117238
E. Morikawa, Y. Matsumoto, Shingo Ohmori, M. Wakao
{"title":"Hybrid system of communication and radio determination using two geostationary satellites","authors":"E. Morikawa, Y. Matsumoto, Shingo Ohmori, M. Wakao","doi":"10.1109/ICC.1990.117238","DOIUrl":"https://doi.org/10.1109/ICC.1990.117238","url":null,"abstract":"A hybrid satellite system has been developed which can provide both communications and positioning services in one system using two geostationary satellites. The distinctive feature is that location information can be provided by transmitting and receiving ranging signals over the same channel as communications through two geostationary satellites. The system configurations of two different methods are described.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121825671","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 fully compatible HDTV system with equi-resolution 具有等分辨率的完全兼容的高清电视系统
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117200
M. Pazarci, J. LoCicero
{"title":"A fully compatible HDTV system with equi-resolution","authors":"M. Pazarci, J. LoCicero","doi":"10.1109/ICC.1990.117200","DOIUrl":"https://doi.org/10.1109/ICC.1990.117200","url":null,"abstract":"A fully NTSC-compatible, two-channel, wide aspect-ratio HDTV (high-definition television) system with equal vertical and horizontal resolutions is described. The wideband, Y, I and Q components are spectrally split into low-frequency and high-frequency bands. However, only the low-frequency components are spatially split into center and edge segments. The low-frequency edge signals are NTSC encoded and decoded using the existing hardware for the compatible center signals. The system uses augmented vertical filters and produces minimal cross-luminance and cross-chrominance, while providing equal edge and center resolutions.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116772604","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
Network consolidation via wideband packet technology-private network trial of IACS in AT&T IMS 基于宽带分组技术的网络整合——AT&T IMS中IACS的专网试验
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117069
C. P. Ashoka, Rex N. Paul
{"title":"Network consolidation via wideband packet technology-private network trial of IACS in AT&T IMS","authors":"C. P. Ashoka, Rex N. Paul","doi":"10.1109/ICC.1990.117069","DOIUrl":"https://doi.org/10.1109/ICC.1990.117069","url":null,"abstract":"The Information Management Services (IMS) organization of AT&T selected the wideband-packet-technology-based integrated access and cross-connect system (IACS) as a vehicle for integrating AT&T's many separate and disparate networks into one network providing voice, data, and image services. The IACS is a packet multiplexer offered by AT&T Network Systems that integrates voice, data, and image information through packetizing and statistical multiplexing. IMS conducted a trial of the IACS between October 1988 and January 1989 in a selected segment of AT&T's Corporate Network. The trial gave the users an opportunity to evaluate the network performance, as well as the operation, administration, and maintenance tools, while gaining experience in managing and administering an integrated voice/data network. Evaluation of the trial results showed that: (i) the IACS-based packet network maintains both voice and data services quality; and (ii) an integrated voice/data network can be managed more efficiently than separate networks.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116922079","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
Adaptive CPFSK signaling 自适应CPFSK信令
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117154
J. Fonseka
{"title":"Adaptive CPFSK signaling","authors":"J. Fonseka","doi":"10.1109/ICC.1990.117154","DOIUrl":"https://doi.org/10.1109/ICC.1990.117154","url":null,"abstract":"An adaptive CPFSK (continuous-phase frequency-shift keying) signaling technique which achieves the maximum constraint length allowed by the number of states of the signals is introduced. Adaptive CPFSK signals select modulation indices dependent on both the transmitted symbol and the state of the system. These signals employ the same set of modulation indices during all signaling intervals. The state transition matrix of the signaling system is used to select the modulation indices. Numerical results obtained for binary full-response and partial-response signaling indicate that adaptive CPFSK signaling performs significantly better than MSK (minimum-shift keying) signaling at almost the same spectral occupancy.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"150 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120940881","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
High quality transmission system design for HDTV signals 高清电视信号高质量传输系统设计
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117233
Y. Okumura, K. Irie, R. Kishimoto
{"title":"High quality transmission system design for HDTV signals","authors":"Y. Okumura, K. Irie, R. Kishimoto","doi":"10.1109/ICC.1990.117233","DOIUrl":"https://doi.org/10.1109/ICC.1990.117233","url":null,"abstract":"An ATM (asynchronous transfer mode)-based broadband network architecture and a picture coding algorithm for a high-quality HDTV (high-definition television) transmission system are proposed. The HDTV coding algorithm is based on subband coding, and its suitability for maintaining original high picture quality has been confirmed. Computer simulation results show that SNR is about 38 dB when average entropy is 1 b/pel. The coding algorithm can be applied to HDTV transmission between broadcast stations by optimizing its coding parameters.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121262033","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
Basic Exchange Radio-from concept to reality 基本交换无线电-从概念到现实
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117034
S.H. Lin, R. Wolff
{"title":"Basic Exchange Radio-from concept to reality","authors":"S.H. Lin, R. Wolff","doi":"10.1109/ICC.1990.117034","DOIUrl":"https://doi.org/10.1109/ICC.1990.117034","url":null,"abstract":"The authors review the evolutionary process that has moved the Basic Exchange Radio (BEXR) service from a research concept to a reality through the joint efforts of Bellcore and Bellcore Client Companies (BCCs). Attention is given to the concept, technology assessment, economic and market analyses, frequency spectrum issues, system field trials, generic technical criteria, technical analysis of vendors products, engineering guidelines, BEXR standards, and deployment of BEXR services. It is noted that the successful application of the point-to-multipoint wireless digital loop carrier technology to provide telephone services to scattered subscribers in rural areas represents the beginning of a revolution in subscriber loop technologies. Prospects for further applications of the rapidly advancing wireless access technologies in the subscriber loops are also discussed.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"50 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121369055","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
Channel coding for binary recording with intersymbol interference 具有码间干扰的二进制记录信道编码
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117354
W. Abbott, J. Cioffi
{"title":"Channel coding for binary recording with intersymbol interference","authors":"W. Abbott, J. Cioffi","doi":"10.1109/ICC.1990.117354","DOIUrl":"https://doi.org/10.1109/ICC.1990.117354","url":null,"abstract":"The saturation recording channel with fixed-amplitude bipolar inputs, a linear Lorentzian read-back transition response, and additive Gaussian noise is modeled. Linear density increase on such a channel can be achieved only by increasing the clock rate of the written data signal. The authors define a measure of coding gain for the recording channel that compares a coded system with an uncoded system, each at a different clock rate, but with the same linear density (or data rate). This measure can be decomposed into the sum of an equalization gain and a fundamental coding gain. It is shown that good equalization gain can be achieved by choosing multidimensional codewords such that their power spectra are 'matched' to the channel pulse response spectrum, and they have increased minimum distance at the channel output.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127129914","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
A trial of video broadcasting in the 12 GHz band 12千兆赫波段的视频广播试验
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117043
P. Hawkins
{"title":"A trial of video broadcasting in the 12 GHz band","authors":"P. Hawkins","doi":"10.1109/ICC.1990.117043","DOIUrl":"https://doi.org/10.1109/ICC.1990.117043","url":null,"abstract":"The authors describe a video broadcasting trial carried out at frequencies in the 12-GHZ band by GEC Plessey Telecommunications in collaboration with Marconi Defence Systems Ltd. over a 10-week trial period from December 1988 to February 1989. Details of equipment configurations and trial parameters are presented, together with an analysis of the measured data and the conclusions drawn. A broadcast model developed by the GEC-Marconi Research Centre was used to predict the coverage area. The trial clearly indicated that frequencies around 12 GHz are eminently suitable for TV broadcasting from terrestrial transmitters using frequency modulation.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123261861","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
Telephone switching systems software architecture: where have we been-where are we going? 电话交换系统软件体系结构:我们已经做了什么——我们要去哪里?
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117195
W.H. Memmer
{"title":"Telephone switching systems software architecture: where have we been-where are we going?","authors":"W.H. Memmer","doi":"10.1109/ICC.1990.117195","DOIUrl":"https://doi.org/10.1109/ICC.1990.117195","url":null,"abstract":"Some of the history of telephone switching systems architecture is reviewed, and an overview of the directions being taken in this area is given. The switching software architecture envisioned for the future would allow an operating company to rapidly deploy new services in response to customers' needs. The open interface between call processing and service processing would permit the company to make deployment decisions based on business and operational considerations, in order to optimize service offerings. In fact, it should be possible to migrate service programs from one platform (e.g. the switch) to another (e.g. a centralized control point) and back again as needs dictate. All this could be done without the need for reprogramming call processing or service processing. With the standard program language used for application programming, every switch (independent of supplier) would have the same application software. That software could be acquired, module by module, from many diverse sources.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123582608","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 role of SONET-based networks in British Telecom 基于sonet的网络在英国电信中的作用
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117208
S. Whitt, I. Hawker, J. Callaghan
{"title":"The role of SONET-based networks in British Telecom","authors":"S. Whitt, I. Hawker, J. Callaghan","doi":"10.1109/ICC.1990.117208","DOIUrl":"https://doi.org/10.1109/ICC.1990.117208","url":null,"abstract":"The introduction of SONET (synchronous optical network) digital networks into the British Telecom (BT) transmission network is discussed. The flexibility thus achieved will be used for functions such as traffic grooming (e.g. to maximize fill factors) and to implement an integrated protection strategy, whereby spare transmission capacity is managed by downloading protection algorithms to meet the local requirements of each region or network layer. New network topologies will facilitate ease of growth, good path availability (including dual access), and resilience against disasters. These topologies will make maximum use of the existing duct routes. It is concluded that, when combined with new network architectures and management philosophy, SONET-based networks will allow BT to provide improved quality of service and the ability to meet customer requirements into the future.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125498232","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
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