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IEEE Transactions on Communication Technology最新文献

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Performance of an Efficient Parallel Data Transmission System 一种高效并行数据传输系统的性能
IEEE Transactions on Communication Technology Pub Date : 1967-12-01 DOI: 10.1109/TCOM.1967.1089674
B. Saltzberg
{"title":"Performance of an Efficient Parallel Data Transmission System","authors":"B. Saltzberg","doi":"10.1109/TCOM.1967.1089674","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089674","url":null,"abstract":"A parallel quadrature AM data transmission system may be implemented with a number of overlapping channels, each carrying a signaling rateb, spacedb/2apart in frequency. When a large number of channels are used, the system allows transmission speeds very close to the Nyquist rate, with little sensitivity to delay and amplitude distortion of the transmission medium. The receiver requires precise phasing of the demodulating carriers and sampling times in order to keep crosstalk between channels small. In the presence of delay and amplitude distortion, better results are obtained when half cosine roll-offs are used for shaping each channel than for full cosine roll-off. This transmission scheme appears to be a promising technique for achieving good performance at high information rates over bandlimited dispersive transmission media.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114957359","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: 1047
Performance of Random Error Correcting Codes on the Switched Telephone Network 交换电话网中随机纠错码的性能
IEEE Transactions on Communication Technology Pub Date : 1967-12-01 DOI: 10.1109/TCOM.1967.1089680
A. Franco, L. Saporta
{"title":"Performance of Random Error Correcting Codes on the Switched Telephone Network","authors":"A. Franco, L. Saporta","doi":"10.1109/TCOM.1967.1089680","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089680","url":null,"abstract":"The performance of perfect codes on the switched telephone network is evaluated in terms of output block error and output bit error probability. By evaluating these codes against experimental data describing the switched telephone network, it is shown that significant improvement in the block error rate is possible, but that only negligible improvement in the bit error rate is obtained even with block lengths as long as 230 bits and with redundancies approaching unity.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125860257","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
Experimental Optical Links 实验光链路
IEEE Transactions on Communication Technology Pub Date : 1967-12-01 DOI: 10.1109/TCOM.1967.1089683
B. Shah
{"title":"Experimental Optical Links","authors":"B. Shah","doi":"10.1109/TCOM.1967.1089683","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089683","url":null,"abstract":"The design and performance of two experimental, optical links, tailored specifically to interconnect two high-speed tape units, are described. Both links, a full duplex digital link and a full duplex AM/FSK link, are presented in necessary detail. Laboratory experiments have shown that 33-Mbaud operation is feasible.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121806568","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
Early No. 1 ESS Field Experiences: I - Two-Wire System for Commercial Applications 早期第一ESS现场经验:I -用于商业应用的双线系统
IEEE Transactions on Communication Technology Pub Date : 1967-12-01 DOI: 10.1109/TCOM.1967.1089687
G. Haugk
{"title":"Early No. 1 ESS Field Experiences: I - Two-Wire System for Commercial Applications","authors":"G. Haugk","doi":"10.1109/TCOM.1967.1089687","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089687","url":null,"abstract":"The No. 1 Electronic Switching System (ESS) is the first electronic machine produced in quantity by the Bell System for central office switching. A 2-wire version is being used for Bell System commercial customers and a 4-wire version for a variety of government and military applications. The system is composed largely of solid-state devices and is controlled by a stored program. The nine No. 1 ESS's now in use have been giving good service to their commercial and government users. Judging from customer reaction and from various technical performance criteria, the No. 1 ESS has met its design objectives.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129107883","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
Designing an Automated Oceanographic Buoy Interrogation System Using HF Radio 基于高频无线电的海洋浮标自动询问系统设计
IEEE Transactions on Communication Technology Pub Date : 1967-12-01 DOI: 10.1109/TCOM.1967.1089686
A. McCalmont, J. Leshick
{"title":"Designing an Automated Oceanographic Buoy Interrogation System Using HF Radio","authors":"A. McCalmont, J. Leshick","doi":"10.1109/TCOM.1967.1089686","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089686","url":null,"abstract":"Automatic interrogation and readout of a worldwide system of over 300 meteorological/oceanographic buoys requires careful attention to system control and communication interfaces. This paper describes the design of a system in which operation is executed by a medium-size digital computer which serves to control interrogation of the buoys, format the received digital transmissions, and put them on line for transmission over cable to a separate central data-processing center for analysis. To exercise system control, a number of functions must be performed. These are interrogation of buoys, data checking, data conversion, retransmission, control, and housekeeping.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"34 36","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120821340","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
Error Probability for Multipath Fading - The "Slow and Flat" Idealization 多径衰落的误差概率——“慢而平”的理想化
IEEE Transactions on Communication Technology Pub Date : 1967-12-01 DOI: 10.1109/TCOM.1967.1089666
M. Nesenbergs
{"title":"Error Probability for Multipath Fading - The \"Slow and Flat\" Idealization","authors":"M. Nesenbergs","doi":"10.1109/TCOM.1967.1089666","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089666","url":null,"abstract":"The ideal slow and flat fading model, consisting of any number of multipaths, is revisited. In this model the assignment of specular and scatter components is arbitrary. The additive disturbance need not be Gaussian noise, certain random distortions in the receiver are permitted, and the digital system and the modems are not restricted. Under these assumptions alternative error probability relations are given between the fading and nonfading signals. Their application to practical cases is straightforward. General performance bounds are also derived which are simple functions of the specular and scatter energy ratio in the multipath signal.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125077034","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
Early No. 1 ESS Field Experiences: II - Four-Wire System for Government and Military Applications 早期第一ESS现场经验:II -政府和军事应用的四线系统
IEEE Transactions on Communication Technology Pub Date : 1967-12-01 DOI: 10.1109/TCOM.1967.1089671
H. Seckler
{"title":"Early No. 1 ESS Field Experiences: II - Four-Wire System for Government and Military Applications","authors":"H. Seckler","doi":"10.1109/TCOM.1967.1089671","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089671","url":null,"abstract":"Late in 1962 Bell Telephone Laboratories began the development of a 4-wire version of the No.1 ESS for government and military applications. An electronic stored program system was requested by the government to meet the growing needs of defense communication. There are now thirteen 4-wire No.1 ESSs in the government's AUTOVON network, in addition to 23 No. 5 crossbar offices, most placed in service prior to 1966. By 1969 it is anticipated that more than 50 Bell System offices will be in operation throughout the United States. By this time the crossbar machines will have started to be replaced by ESSs, as shown in Fig. 2. Additional electronic offices, overseas as well as in the United States and Canada, are being planned for AUTOVON by non-Bell System companies. Before 1970 a global defense communication network of ESSs should be realized. Early field experience with the No. 1 ESS, both 2- and 4- wire, has been satisfactory. New offices endowed with new service features and improved maintenance capabilities are being introduced at a growing rate. About 100 No. 1 ESSs are now in various stages of manufacture and installation or in field operation. The ability of this design to provide continuous, high-quality service seems assured.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115064688","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 TOUCH-TONE® Telephone - Transmission of Digital Information ® The TOUCH-TONE®电话-数字信息传输®
IEEE Transactions on Communication Technology Pub Date : 1967-12-01 DOI: 10.1109/TCOM.1967.1089660
J. Soderberg, R. Campbell, F. Bates
{"title":"The TOUCH-TONE® Telephone - Transmission of Digital Information ®","authors":"J. Soderberg, R. Campbell, F. Bates","doi":"10.1109/TCOM.1967.1089660","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089660","url":null,"abstract":"A discussion of the Bell System TOUCH-TONE®dialing system when it is alternatively used in data applications is presented. The particular aspects of this service and the hardware involved which lend themselves to alternate data uses are discussed in detail. Among the points covered are coding, the keyboard, error possibilities, and the technical aspects of the receiving data set.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"224 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115738860","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
Reliabilty and Field Experience of Electronic Switching Systems 电子交换系统的可靠性和现场经验
IEEE Transactions on Communication Technology Pub Date : 1967-12-01 DOI: 10.1109/TCOM.1967.1089677
W. Karas
{"title":"Reliabilty and Field Experience of Electronic Switching Systems","authors":"W. Karas","doi":"10.1109/TCOM.1967.1089677","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089677","url":null,"abstract":"Field experience of electronic switching systems is compared with design objectives expressed in reliability and maintainability parameters, applied from the start of design, for the purpose of meeting stringent customer requirements. A feedback system of field performance was established, reliability analysis was performed, and the results were applied to a reliability model to determine to what degree the established objectives were met.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125300959","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
Reliability field experience in electronic switching systems 在电子开关系统可靠性方面有经验
IEEE Transactions on Communication Technology Pub Date : 1967-12-01 DOI: 10.1109/TCOM.1967.1089676
S. Weiner
{"title":"Reliability field experience in electronic switching systems","authors":"S. Weiner","doi":"10.1109/TCOM.1967.1089676","DOIUrl":"https://doi.org/10.1109/TCOM.1967.1089676","url":null,"abstract":"Electronic switching systems have progressed through the experimental trial stages and a number of systems are now in regular commercial use. The reliability experienced in these field installations wiII be discussed by authors representing four different companies - one English, one German, and two American. Reliability and maintenance data from several operating systems will be used to demonstrate the system dependability currently achieved, and these achievements will be compared with the desired objectives.","PeriodicalId":134522,"journal":{"name":"IEEE Transactions on Communication Technology","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134209225","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
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