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IEEE International Conference on Communications, - Spanning the Universe.最新文献

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Performance of a fourth-power envelope detector for symbol-rate tone generation 用于符号率音调生成的四功率包络检测器的性能
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13697
D. Reed, M. Wickert
{"title":"Performance of a fourth-power envelope detector for symbol-rate tone generation","authors":"D. Reed, M. Wickert","doi":"10.1109/ICC.1988.13697","DOIUrl":"https://doi.org/10.1109/ICC.1988.13697","url":null,"abstract":"The use of a fourth-law envelope detector followed by a bandpass filter for detection of the symbol rate of a digitally modulated signal is investigated. The detector output spectrum is found and the output SNR is then used as a measure of performance. The effect of signal pulse shape, i.e. bandlimiting, on performance is studied. The performance of the fourth-law circuit, compared to that of a square-law device, is better for small excess bandwidth and high input SNR. However, it has a null in performance which depends on the pulse shape and the input SNR.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132068851","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
Key technology for multi-gigabit optical transmission systems 多千兆光传输系统关键技术
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13580
T. Touge, H. Nishimto, T. Okiyama, H. Hamano
{"title":"Key technology for multi-gigabit optical transmission systems","authors":"T. Touge, H. Nishimto, T. Okiyama, H. Hamano","doi":"10.1109/ICC.1988.13580","DOIUrl":"https://doi.org/10.1109/ICC.1988.13580","url":null,"abstract":"The authors present a study of multigigabit optical transmission technology. System configuration and aspects of the development needed to construct multigigabit optical transmission systems are discussed. The results of a 4 Gb/s optical transmission experiment over 132 km, and the performance of a novel 4 Gb/s high-speed Si bipolar IC are presented.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"2021 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132114124","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
Tracking performance of synchronizers driven by trellis-code modulated signals 栅格码调制信号驱动同步器的跟踪性能
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13715
N. D'Andrea, U. Mengali
{"title":"Tracking performance of synchronizers driven by trellis-code modulated signals","authors":"N. D'Andrea, U. Mengali","doi":"10.1109/ICC.1988.13715","DOIUrl":"https://doi.org/10.1109/ICC.1988.13715","url":null,"abstract":"The authors investigate the tracking performance of two popular synchronization schemes used for clock and carrier recovery in trellis-code modulated signals. Clock extraction is accomplished by squaring and then filtering the incoming signal with a narrow bandpass filter tuned to the nominal symbol rate. Phase recovery is achieved by means of a decision-directed loop wherein an error voltage, derived from the signal samples and the decoder decisions, is used to update the current estimate of the carrier phase. The standard of comparison is the performance of the same synchronizers when operating with uncoded signals. The main result is that good codes do not affect the tracking operation of the synchronizers. More generally, sufficient conditions are given for the tracking behavior to be code-independent.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132363329","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
Loop fiber access in BellSouth 贝尔南部的环路光纤接入
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13684
G.W. Hicks
{"title":"Loop fiber access in BellSouth","authors":"G.W. Hicks","doi":"10.1109/ICC.1988.13684","DOIUrl":"https://doi.org/10.1109/ICC.1988.13684","url":null,"abstract":"BellSouth has been actively placing fiber optics in the outside plant since 1980 at the rate of about 100 megameters per year. The author discusses the services that are planned and the loop fiber projects that are in progress. Service offerings will initially be limited due to the slow pace of customer acceptance and the evolving state of technology. However, it is expected that once the new services are available on a broad scale, usage and costs will go down and the availability of even newer services will increase.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132496148","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
Dependability planning of telecommunication networks 电信网络可靠性规划
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13570
P. Dirke
{"title":"Dependability planning of telecommunication networks","authors":"P. Dirke","doi":"10.1109/ICC.1988.13570","DOIUrl":"https://doi.org/10.1109/ICC.1988.13570","url":null,"abstract":"Deals with the problem of finding a well-balanced level of dependability (reliability, maintainability and maintenance support) in planning. Fault consequences are expressed in terms of money and are included as additional cost factors in planning and cost optimization. The cost factors include a service parameter to account for customers' experience as well as costs of lost traffic revenue and corrective maintenance. Actions to promote dependability are investigated by means of a cost-benefit analysis.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130225441","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
Development of high performance DCMS with 3-bit and 4-bit coding ADPCM 采用3位和4位ADPCM编码的高性能DCMS的研制
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13818
Y. Shoji, O. Noguchi, T. Suzuki
{"title":"Development of high performance DCMS with 3-bit and 4-bit coding ADPCM","authors":"Y. Shoji, O. Noguchi, T. Suzuki","doi":"10.1109/ICC.1988.13818","DOIUrl":"https://doi.org/10.1109/ICC.1988.13818","url":null,"abstract":"A digital circuit multiplication system (DCMS), which is equipped with an echo canceller to perform activity detection by applying reciprocal action between an echo canceller and a speech detector, is described. A high-quality speech detector, developed by introducing a hangover controller and linear predictive coding (LPC) analysis, and a trial model of the DCMS using advanced adaptive differential pulse-code modulation (ADPCM) which allowed 4-bit coding for voiceband data (VBD) signals, are presented. Efficiency improved by 10% using 4-bit coding for VBD.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133959494","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
10.5 GHz-50 GHz point-to-point radio equipment for local distribution 10.5 GHz-50 GHz点对点无线电设备，用于本地分布
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13830
T. Mizumura, S. Minami, Y. Yanagiuchi
{"title":"10.5 GHz-50 GHz point-to-point radio equipment for local distribution","authors":"T. Mizumura, S. Minami, Y. Yanagiuchi","doi":"10.1109/ICC.1988.13830","DOIUrl":"https://doi.org/10.1109/ICC.1988.13830","url":null,"abstract":"A series of low-capacity point-to-point digital microwave radio devices are being developed, whose frequency is from 10.5 GHz to 50 GHz. Design considerations for these devices are adaptability to both various data transmission rates and to an analog video, easy installation and maintenance, compactness and light weight, and high system gain. These design consideration are shown in detail, and the realization and performance of this device is also described.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128923412","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
Design of a fully digital adaptive equalizer for a 256 QAM modem 256 QAM调制解调器全数字自适应均衡器的设计
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13773
M. Bolla, L. Rossi, A. Spalvieri, A. D'andrea
{"title":"Design of a fully digital adaptive equalizer for a 256 QAM modem","authors":"M. Bolla, L. Rossi, A. Spalvieri, A. D'andrea","doi":"10.1109/ICC.1988.13773","DOIUrl":"https://doi.org/10.1109/ICC.1988.13773","url":null,"abstract":"A theoretical study of the performance and development of an equalizer that complies with the stringent specifications imposed by a 256 QAM, 2*40 Mb/s system (rate=35 Msymbol/s) is presented. Design rules for the accuracy of the internal arithmetic and A/D converters are suggested. The analysis is based on the following main parameters: (1) dynamic ranges, (2) step size and accumulator length, (3) effect of digital quantizing, and (4) arithmetic design of the correlators. An accurate theory of operation is presented with examples of simulation results.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126591727","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
System design and software development methodologies in the TROPICO system TROPICO系统的系统设计和软件开发方法
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13637
C.C.F. Araujo, R. Cioffi, S. Dias, J.H.A. Franco, E. Melo, L. Reis
{"title":"System design and software development methodologies in the TROPICO system","authors":"C.C.F. Araujo, R. Cioffi, S. Dias, J.H.A. Franco, E. Melo, L. Reis","doi":"10.1109/ICC.1988.13637","DOIUrl":"https://doi.org/10.1109/ICC.1988.13637","url":null,"abstract":"The main features of the system design and software development methodology currently being used in the TROPICO RA switching system development are described. The methodology's original concepts are introduced together with the functional process specification language used. The system development life cycle is described as well some detailed aspects of the software development. The information model, which tightly links the system design to the physical design, is presented. The key role of the CHILL language is highlighted. Finally, the integrated software development environment is described.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133511975","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
Voice and text messaging-a concept to integrate the services of telephone and data networks 语音和文本信息——一个集成电话和数据网络服务的概念
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13600
L. Lee, M. Oun-young
{"title":"Voice and text messaging-a concept to integrate the services of telephone and data networks","authors":"L. Lee, M. Oun-young","doi":"10.1109/ICC.1988.13600","DOIUrl":"https://doi.org/10.1109/ICC.1988.13600","url":null,"abstract":"A concept is proposed for a voice and text messaging (VTM) system, which can integrate the distinct services of the telephone and data networks very quickly. In Taiwan the telephone network has very wide coverage and a large number of users, while the data network has very limited number of subscribers, because they have to possess a terminal. The core of VTM described is a Chinese text-to-speech system which can transform any Chinese text processed in the data network into Mandarin voice for transmission over the telephone network. The telephone network users can key in their instructions such as choice of information, text processing, forward and backward skipping by pressing the touch-tone buttons of the telephone set. The electronic mail and database information services provided by the data network therefore become a portion of the voice mail and message services provided by the telephone network. A large number of telephone network users, even without a terminal, can be served by both networks.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127828045","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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