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IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond最新文献

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Speech processing in the pan-European digital mobile radio system (GSM)-system overview 泛欧数字移动无线电系统(GSM)中的语音处理-系统概述
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64120
J. E. Natvig, S. Hansen, J. De Brito
{"title":"Speech processing in the pan-European digital mobile radio system (GSM)-system overview","authors":"J. E. Natvig, S. Hansen, J. De Brito","doi":"10.1109/GLOCOM.1989.64120","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64120","url":null,"abstract":"A digital cellular mobile radio system has been under development in Europe since 1982, under the coordination of the CEPT (European Conference of Post and Telecommunications Administrations) working group GSM (Groupe Special Mobile). Among the crucial issues in the design of this system were the development of a low-bit-rate speech codec and voice-activated transmission scheme. After a brief review of the historical background, an overview of the system is provided, with particular emphasis on the factors that interacted with the design of the speech processing functions, e.g. access and transmission methods, error protection, and network organization.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123894978","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: 26
INFONET project: a flexible MAN architecture for very high throughput ATM communications INFONET项目:用于非常高吞吐量ATM通信的灵活城域网架构
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64226
Andrea Baiocchi, M. Carosi, Marco Listanti, G. Pacifici, A. Roveri, R. Winkler
{"title":"INFONET project: a flexible MAN architecture for very high throughput ATM communications","authors":"Andrea Baiocchi, M. Carosi, Marco Listanti, G. Pacifici, A. Roveri, R. Winkler","doi":"10.1109/GLOCOM.1989.64226","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64226","url":null,"abstract":"The authors discuss INFONET II, a LAN/MAN (local/metropolitan area network) optical fiber architecture conceived to integrate the isochronous and nonisochronous traffic handling in an ATM (asynchronous transfer mode) environment. They present a new access protocol for nonisochronous traffic which has the goal of improving the throughput/delay performances of the early version of Infonet. The main issues addressed are the network structure, the arrangement of the physical interface of the network stations, the MAC procedure, and the overload control mechanism. A case study is considered to evaluate the network's performance.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"246 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124300574","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
Throughput analysis of CDMA access policies in radio determination satellite service 无线定位卫星业务中CDMA接入策略的吞吐量分析
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64043
L. C. Pond, V.O.K. Li
{"title":"Throughput analysis of CDMA access policies in radio determination satellite service","authors":"L. C. Pond, V.O.K. Li","doi":"10.1109/GLOCOM.1989.64043","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64043","url":null,"abstract":"Policies for accessing a packet radio network, under the assumptions of the L-channel CDMA (code division multiple access) model and nonunity receiver idle probability, are proposed, and analytical tools to evaluate their performances are developed. These policies and tools are applicable to random access packet radio networks, such as the radio determination satellite service (RDSS) systems, which require wideband or spread-spectrum techniques, but carrier sense, collision detection, and busy-tones techniques are inapplicable. These results are extended to general packet radio networks.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125868864","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
An 11-tap 0.9- mu m CMOS digital transversal equalizer for digital radio 用于数字无线电的11分接0.9 μ m CMOS数字横向均衡器
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64005
H. C. Reeve, R. Ward, C.J. Lin, G. D. Martin
{"title":"An 11-tap 0.9- mu m CMOS digital transversal equalizer for digital radio","authors":"H. C. Reeve, R. Ward, C.J. Lin, G. D. Martin","doi":"10.1109/GLOCOM.1989.64005","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64005","url":null,"abstract":"A 0.9- mu m CMOS VLSI device was designed and developed to perform as an adaptive transversal equalizer for digital radio. The device contains an 11-tap multiply-add structure complete with control hardware for 12-b coefficients. Void of any pipelining, the device is guaranteed for 27-MHz operation, and it has demonstrated speeds in excess of 40 MHz. A digital radio modem has been designed by AT&T using the VLSI device and is now being manufactured for a 64-QAM (quadrature amplitude modulation) 4-GHz radio system. BER (bit error rate) performance versus S/N ratio was within 1.8 dB of theoretical (no error correction) at a BER of 1*10/sup -8/. M-curves were measured for the 20-MHz channel and were very close to theoretical. Finally, modem acquisition statistics were tabulated under various channel distortions, with the average time of acquisition being less than 200 ms.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128392897","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
The MSAT-X MARECS B2 satellite experiment: ground segment results MSAT-X MARECS B2卫星试验:地面段结果
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64068
T. Jedrey, N. Lay, K.I. Dessouky, C. Cheetham, J. Parkyn
{"title":"The MSAT-X MARECS B2 satellite experiment: ground segment results","authors":"T. Jedrey, N. Lay, K.I. Dessouky, C. Cheetham, J. Parkyn","doi":"10.1109/GLOCOM.1989.64068","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64068","url":null,"abstract":"The results of a recently completed satellite experiment employing the JPL MSAT-X developed land-mobile satellite communication terminal are described. In this experiment, a full duplex 4800-b/s digital data and voice communication link was established through the INMARSAT MARECS B2 satellite between Atlantic City, New Jersey, and Southbury, Connecticut. A series of experiments was performed to characterize the terminal performance over this link. The basic experimental setup and the preliminary results of the speech and data experiments are presented. The satellite environment proved to be near to what was expected, and as a result the experimental results were very close to theory/simulation/laboratory experiments. It was found that the ground-to-ground communication links were more benign links than the ground-to-air and air-to-ground links, and this is reflected in the improved margins for the ground-to-ground links (approximately 5 dB versus 3.2 dB for the aeronautical links.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128582630","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
On renewal inner channels and block code error control outer channels 对内部信道进行更新，对外部信道进行分组码错误控制
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64234
D. R. Oosthuizen, H. Ferreira, F. Swarts
{"title":"On renewal inner channels and block code error control outer channels","authors":"D. R. Oosthuizen, H. Ferreira, F. Swarts","doi":"10.1109/GLOCOM.1989.64234","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64234","url":null,"abstract":"The authors investigate the underlying statistical structure of the block error detection, correction, and misdetection events of a block code on a discrete renewal inner channel, such as a fading RF channel. They show that these events can be represented with outer channel models, i.e. partitioned Markov processes, similar to the inner channel models. Analytical procedures to determine the parameters of these outer channel models are presented. The application of these models in the design of such error-control systems as ARQ (automatic repeat request) systems is investigated. Consideration is also given to the memory-efficient recording of the channel error stream to be recorded or stored, in order to parameterize inner channel models. The results of several simulations to verify the analytical procedures are also presented.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121940974","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: 6
Convergence time improvement in the carrier recovery circuits for digital QAM radio link 数字QAM无线电链路载波恢复电路收敛时间的改进
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64002
A. Bernardini, S. de Fina, P. Parente
{"title":"Convergence time improvement in the carrier recovery circuits for digital QAM radio link","authors":"A. Bernardini, S. de Fina, P. Parente","doi":"10.1109/GLOCOM.1989.64002","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64002","url":null,"abstract":"The performance of a particular baseband circuit for carrier recovery (CR) in QAM (quadrature amplitude modulation) digital radio links is analyzed. An increase of convergence speed is made possible by adopting conventional phase detectors through the use not only of the diagonal QAM signal states, but also of the all-QAM signal states. Use of this technique makes blind convergence possible. S-curves are plotted for the analysis of algorithm performances. A differential modulation method should also be implemented in order to recover the phase errors greater than pi /2. It is suggested that an optimum subset of QAM signal states be investigated to find an optimum compromise between convergence speed and performance.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116120504","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
B-ISDN signalling protocol capabilities B-ISDN信令协议能力
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64191
H. Ishii, M. Kawarasaki
{"title":"B-ISDN signalling protocol capabilities","authors":"H. Ishii, M. Kawarasaki","doi":"10.1109/GLOCOM.1989.64191","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64191","url":null,"abstract":"The authors outline B-ISDN (broadband integrated services digital network) protocol requirements and clarify necessary signaling protocol functionalities for each service phase. For broadband-specific services they propose mechanisms to control multipoint communication. Discussed is the integration of user-network and interoffice interface signaling, particularly the replacement of SS7 by DSS1. A new protocol structure for various multipoint services is described. A call control architecture with modularized protocol structure which includes basic and enhanced control modules is proposed.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116453774","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
Performance-reliability improvement in a distributed system 分布式系统的性能可靠性改进
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.63989
V. Catania, L. Milazzo, L. Vita
{"title":"Performance-reliability improvement in a distributed system","authors":"V. Catania, L. Milazzo, L. Vita","doi":"10.1109/GLOCOM.1989.63989","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.63989","url":null,"abstract":"An assessment of an optical-fiber LAN (local area network) in which some strategies for increasing fault tolerance have been defined is presented. By means of a stochastic model based on a Markov chain with an absorbent state, the basic parameter linked to network reliability is assessed. In particular, the increase in mean time to failure and performability achieved by introducing a new monitor recovery process is determined. The results presented confirm the validity of the monitor recovery process in enhancing the fault tolerance of a token-ring network and show that the strategy for defining fault-tolerant protocols and architectures effectively enhances network reliability.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126601025","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
TDMA LAN with multiple bus topology for wide area applications 具有多总线拓扑的TDMA局域网用于广域应用
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64039
N. Kuroyanagi
{"title":"TDMA LAN with multiple bus topology for wide area applications","authors":"N. Kuroyanagi","doi":"10.1109/GLOCOM.1989.64039","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64039","url":null,"abstract":"A novel configuration which achieves TDMA (time division multiple access) functions on a connected bus topology for wide area applications, resulting in an integrated voice-data (IVD) transmission capability, a high throughput, connection portability for stations, and high reliability, is proposed. Loop LANs that are composed for multiple bus lines and operate synchronously with a demand-assignment function are presented. The delay time and throughput are derived, revealing that a wide area system with a loop length of less than 25 km can be achieved. It is verified that all the loop systems considered-bidirectional, partial bidirectional, and one-way, in that order-are much more attractive than any existing LAN system with regard to IVD capability, throughput performance, portability, and reliability.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121465477","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
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