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The INMARSAT Standard-C communications system 国际海事卫星组织标准c通信系统
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13728
K. Phillips
{"title":"The INMARSAT Standard-C communications system","authors":"K. Phillips","doi":"10.1109/ICC.1988.13728","DOIUrl":"https://doi.org/10.1109/ICC.1988.13728","url":null,"abstract":"A brief outline is presented of INMARSAT's Standard-C mobile satellite communication system planned for global introduction in 1989. Standard-C is an advanced packet data communications system based on the use of low-cost, compact mobile earth stations. A description of the system architecture, services and mobile earth station features is provided. The various channel types and their functions and characteristics are described. The basic call setup procedures and a brief description of the enhanced group call data broadcast service are presented.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"447 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":"126994804","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
Optical subscriber network architecture for broadband ISDN 宽带ISDN光用户网络体系结构
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13686
T. Fukui, N. Fujimoto, T. Ishihara, T. Soejima, T. Watanabe, K. Hajikano
{"title":"Optical subscriber network architecture for broadband ISDN","authors":"T. Fukui, N. Fujimoto, T. Ishihara, T. Soejima, T. Watanabe, K. Hajikano","doi":"10.1109/ICC.1988.13686","DOIUrl":"https://doi.org/10.1109/ICC.1988.13686","url":null,"abstract":"A description is given of an optical subscriber network architecture and customer premises configuration suitable for broadband services and a method of evolution from narrowband to broadband ISDN. Typical applications and requisites for broadband services are outlined. Fiber network topology and add-drop multiplexing networks are discussed. Customer topology, channel structure, and the D-channel access method are examined.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"14 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":"124081116","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
Linear programming design of digital data transmission filters with arbitrary magnitude specifications 任意量级数字数据传输滤波器的线性规划设计
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13701
H. Samueli
{"title":"Linear programming design of digital data transmission filters with arbitrary magnitude specifications","authors":"H. Samueli","doi":"10.1109/ICC.1988.13701","DOIUrl":"https://doi.org/10.1109/ICC.1988.13701","url":null,"abstract":"A technique based on linear programming is presented for the design of baseband pulse-shaping FIR digital filters for data transmission applications. The filters are matched, and thus the overall Nyquist filter response is split equally between the transmit and receive filters. The filters can be specified to have arbitrary stopband attenuation characteristics, and they satisfy a zero intersymbol interference constraint when cascaded, i.e., the impulse response of the cascade of the two filters has uniformly spaced zero crossings. Design examples are given of matched filters with an equiripple stopband characteristics, and matched filters with a stopband characteristic satisfying FCC mask specifications.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"273 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":"124412214","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: 10
Optical switch and LD devices for future optical subscriber loop systems 用于未来光用户环路系统的光开关和LD器件
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13525
T. Matsumoto, K. Nawata, K. Kikushima, M. Koga
{"title":"Optical switch and LD devices for future optical subscriber loop systems","authors":"T. Matsumoto, K. Nawata, K. Kikushima, M. Koga","doi":"10.1109/ICC.1988.13525","DOIUrl":"https://doi.org/10.1109/ICC.1988.13525","url":null,"abstract":"Introduction of optical switches and laser diodes (LDs) to optical subscriber loop systems is discussed. An optical switch for fault testing is presented for upcoming subscriber loop systems. It can connect a pair of probe fibers to any one of 48-channel subscriber-line fibers. Insertion loss in a normal state is 0.79 dB. An LD optical amplifier and LD wavelength selector are discussed as elements for future subscriber loop systems. Characteristics of the devices for wavelength-division-multiplexing transmission are reported.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"49 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":"127502676","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
Development of O&M communications for an intelligent network 面向智能网络的运维通信发展
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13846
M. Haverty, S.H. Sentoff
{"title":"Development of O&M communications for an intelligent network","authors":"M. Haverty, S.H. Sentoff","doi":"10.1109/ICC.1988.13846","DOIUrl":"https://doi.org/10.1109/ICC.1988.13846","url":null,"abstract":"The development of the communication protocol software used for operations and maintenance (O&M) communications in a distributed intelligent network for initial application in British Telecom's digital derived services network (DSSN) is described. The communication protocol is based on the OSI seven-layer reference model. The intelligent network architecture is briefly described and the OSI reference model is summarized. The development strategy followed, and the experiences encountered in doing the development, are also described.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"38 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":"128756178","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
Implementation of a real time 16 kbit/s SB-APC codec for digital mobile radio systems 用于数字移动无线电系统的实时16kbit /s SB-APC编解码器的实现
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13821
V. Lazzari, M. Quacchia, D. Sereno, E. Turco
{"title":"Implementation of a real time 16 kbit/s SB-APC codec for digital mobile radio systems","authors":"V. Lazzari, M. Quacchia, D. Sereno, E. Turco","doi":"10.1109/ICC.1988.13821","DOIUrl":"https://doi.org/10.1109/ICC.1988.13821","url":null,"abstract":"The implementation of a real-time 16-kb/s speech codec is described, which has been tailored to the specific needs of digital mobile radio. The source coder belongs to the class of split-band adaptive predictive coders (SB-APC) and uses vector quantization (VQ) and dynamic bit-allocation. The transmitter and receiver ends have been implemented on a single board by using one TMS32020 digital signal processor for protection against errors, has been ensured by using a combination of a Golay code and a Hamming code as a forward-error-correcting code (FEC). The FEC algorithm has been implemented on an additional board with the same kind of digital signal processor as the speech codec.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"64 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":"129122247","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
Fiber hubbing applications of high-speed cross-connect systems 高速交叉连接系统的光纤集线器应用
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13587
H.L. Lemberg, M. Eiger
{"title":"Fiber hubbing applications of high-speed cross-connect systems","authors":"H.L. Lemberg, M. Eiger","doi":"10.1109/ICC.1988.13587","DOIUrl":"https://doi.org/10.1109/ICC.1988.13587","url":null,"abstract":"The authors present an overview of fiber hubbing applications of high-speed digital cross-connect systems (DCS). These applications use a cross-connect system such as a DCS 3/1 or similar wideband DCS at the central location, or hub, of a fiber facility network. An examination is made of the physical and logical configuration of the overall facilities network engineered to meet future network demands for mixtures of narrowband and broadband services. This facilities network encompasses the fiber facilities themselves, optical terminating multiplexers, M13 multiplexers or similar transmission terminals, and digital cross-connect systems. A survey is also presented of several classes of DCS applications in fiber networks. DCS roles in networks supporting narrowband services are examined. DCS application to private line services and applications in fiber hubbed networks are also dealt with.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"1 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":"129081506","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
Analysis of generalized retransmission backoff policies for slotted-ALOHA multiaccess channels 开槽aloha多址信道广义重传退让策略分析
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13604
K. Joseph, D. Raychaudhuri
{"title":"Analysis of generalized retransmission backoff policies for slotted-ALOHA multiaccess channels","authors":"K. Joseph, D. Raychaudhuri","doi":"10.1109/ICC.1988.13604","DOIUrl":"https://doi.org/10.1109/ICC.1988.13604","url":null,"abstract":"Backoff techniques, of which the well-known exponential backoff is a special case, are based on adaptation of average retransmission delay as a function of the number of collisions experienced by each message accessing the contention channel. An analytical model for slotted-ALOHA channels using general backoff functions has been developed and used to assess the performance advantages offered by either exponential backoff or alternative policies motivated by heuristic considerations. It is demonstrated that for a finite-source traffic model, the use of appropriate backoff policies can result in significant improvements in stable throughput-delay characteristics relative to nonadaptive systems. It is also shown that while several alternative classes of backoff functions with optimized parameters do not differ substantially in performance, exponential backoff may be outperformed by alternative policies such as the mu -law or step function.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"25 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":"122189693","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: 11
Tight-bound symbol error probability of high-level QAM in the presence of residual amplitude fluctuation (digital radio) 存在残余幅度波动时高级QAM的紧界符号误差概率(数字无线电)
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13613
J.-S. Seo, K. Feher
{"title":"Tight-bound symbol error probability of high-level QAM in the presence of residual amplitude fluctuation (digital radio)","authors":"J.-S. Seo, K. Feher","doi":"10.1109/ICC.1988.13613","DOIUrl":"https://doi.org/10.1109/ICC.1988.13613","url":null,"abstract":"High-level QAM (quadrature amplitude modulation) system performance degradations caused by residual amplitude fluctuations of the received carrier after AGC (automatic gain control) amplifiers are studied. The authors derive tight-bound average symbol error probabilities of 64, 256, and 1024 QAM systems in the presence of the residual amplitude fluctuations and an AWGN (additive white Gaussian noise). The tight-bound symbol error probability is calculated by taking an average value of the typical symbol error probabilities including the best (i.e. the innermost) abilities. To confirm the accuracy of their results, the authors calculate an exact average symbol error probability of 64 QAM and also perform computer simulations on 64 QAM and 256 QAM systems.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"2 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":"127022218","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
Performance analysis of a receiver directed CDMA packet radio network 接收机定向CDMA分组无线网的性能分析
IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI: 10.1109/ICC.1988.13558
H. Xie, L. Merakos
{"title":"Performance analysis of a receiver directed CDMA packet radio network","authors":"H. Xie, L. Merakos","doi":"10.1109/ICC.1988.13558","DOIUrl":"https://doi.org/10.1109/ICC.1988.13558","url":null,"abstract":"A multihop packet radio network using receiver-directed code-division multiple access (CDMA) is considered. The network is modeled as a system of interacting queues, and sufficient conditions for the stability of the queueing system model are obtained. Under an independence assumption, approximate results for the mean packet delay in a symmetric network are given. The results are used to characterize the throughput-delay performance of a symmetric network using frequency-hop spread-spectrum signalling.<<ETX>>","PeriodicalId":191242,"journal":{"name":"IEEE International Conference on Communications, - Spanning the Universe.","volume":"24 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":"130434572","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
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