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[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology最新文献

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Error control coding for future digital cellular systems 未来数字蜂窝系统的错误控制编码
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245480
S. Razavi, K. Chung
{"title":"Error control coding for future digital cellular systems","authors":"S. Razavi, K. Chung","doi":"10.1109/VETEC.1992.245480","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245480","url":null,"abstract":"An attempt was made to characterize the cellular radio channel from the data transmission point of view and to study the performance of the FSK and GTFM modulation schemes for data transmission. The results were achieved by implementation of hardware and software simulation systems, taking into account the effects of multipath fading, adjacent and cochannel interference, and noise. Several error control techniques were evaluated.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134191964","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 new linear synchronous motor for mag-lev train with integrated lift and thrust using a trapezoidal rail 采用梯形导轨的磁悬浮列车用新型升力与推力一体化直线同步电机
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245439
S. M. Al-Kasimi
{"title":"A new linear synchronous motor for mag-lev train with integrated lift and thrust using a trapezoidal rail","authors":"S. M. Al-Kasimi","doi":"10.1109/VETEC.1992.245439","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245439","url":null,"abstract":"An improvement to the ZigZag Linear Homopolar Synchronous Motor (ZZLHSM) providing a combined lift and thrust for maglev vehicles is described. The magnet of ZZLHSM is U-shaped and acts as a two-pole synchronous machine in which each pole is surrounded by a DC coil from a controlled DC power supply. Each pole is made up of two subpoles surrounded by an AC coil feeding from an inverter such that the field could be distorted among the four subpoles. The rail of the ZZLHMS is zigzag shaped and will move relative to the subpoles to minimize reluctance, hence propulsion is obtained. The improvement to the ZZLHSM described is in the trapezoidal shape of the rail. The performance of the Trapezoidally Railed Linear Homopolar Synchronous Motor (TRLHSM) was compared to that of the ZZLHSM with same winding and excitation conditions.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134429511","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
A low-cost experimental adaptive array built in the UHF band (900 MHz) for a minimum response time in interference cancellation 一种低成本的实验自适应阵列，建立在UHF频段(900 MHz)，用于干扰消除的最小响应时间
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245405
M. Diop, J.F. Diouris, J. Saillard
{"title":"A low-cost experimental adaptive array built in the UHF band (900 MHz) for a minimum response time in interference cancellation","authors":"M. Diop, J.F. Diouris, J. Saillard","doi":"10.1109/VETEC.1992.245405","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245405","url":null,"abstract":"In many applications the practical usefulness of adaptive antennas depends on both the convergence rate and noise rejection that can be achieved. Adaptive antenna systems lead generally to very complicated and high cost implementations. An inexpensive hardware prototype is suggested for a real-time processing solution. The emphasis is on its flexibility for the use of various discrete adaptive algorithms.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134556212","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
Architectural design of a code division multiple access cellular system 码分多址蜂窝系统的体系结构设计
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245400
K. Ho
{"title":"Architectural design of a code division multiple access cellular system","authors":"K. Ho","doi":"10.1109/VETEC.1992.245400","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245400","url":null,"abstract":"A design of the code-division multiple access (CDMA) cellular system architecture is presented. The base station architecture is based on a universal platform that can support CDMA and other cellular standards such as AMPS and TDMA in the same base station. The mobile switching center (MSC) architecture is enhanced to support the various CDMA system features such as soft handoff and variable bit rate vocoding. In particular, the digital cellular switch (DCS) at the MSC provides a frame relay packet switching interface to the base station. It is shown that such a packet switching interface can support more voice channels that the conventional DS0/DS1 circuit switching interface and is an essential element in achieving the soft handoff capability.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131781075","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
Flat diversity antenna at 900 MHz for mobile telephone 900兆赫移动电话用平面分集天线
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245403
K. Arai, N. Goto
{"title":"Flat diversity antenna at 900 MHz for mobile telephone","authors":"K. Arai, N. Goto","doi":"10.1109/VETEC.1992.245403","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245403","url":null,"abstract":"A flat diversity antenna is proposed for mobile telephone using a disk-loaded monopole antenna and notch antenna arrays. The notch array designed as a turnstile antenna for receiving the magnetic field components is replaced by the disk of the disk-loaded monopole antenna. Since the electric field components are received by the disk loaded monopole antenna, this combination provides an energy density reception. A prototype of the flat diversity antenna is demonstrated, and the measured results of the input impedance characteristics and the radiation patterns are presented.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":" 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132124858","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
Efficiency of a new microcell system 一种新型微电池系统的效率
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245402
W.C.-Y. Lee
{"title":"Efficiency of a new microcell system","authors":"W.C.-Y. Lee","doi":"10.1109/VETEC.1992.245402","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245402","url":null,"abstract":"It is shown that radio capacity can be increased 2.33 times if a selective zone approach is used, and 1.75 times if a nonselective zone approach is used. The efficiency of using the microcell configuration reaches a maximum because K=3 is the smallest number of cells in a frequency reuse system. When applying the analog system with a nonselective zone configuration, the radio capacity can be increased by 1.75 times. When applying microcells to CDMA systems, the nonselective-zone configuration can be used to further reduce the interference.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132168318","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: 8
Channel efficiency in digital cellular communication systems 数字蜂窝通信系统中的信道效率
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245257
R. Gejji
{"title":"Channel efficiency in digital cellular communication systems","authors":"R. Gejji","doi":"10.1109/VETEC.1992.245257","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245257","url":null,"abstract":"The formula for cellular radio capacity is modified to explicitly include channel efficiency. The effect of a varying carrier-to-interference ratio is considered. Higher carrier power can lead to higher bit-rates per hertz of bandwidth for individual channels, but it reduces the frequency reuse. The tradeoff between these two effects is made explicit. It is seen that there is a point of diminishing returns beyond which the advantage of higher channel efficiency is outweighed by reduced frequency reuse. There should be an optimum carrier-to-interference ratio that maximizes the capacity as measured in number of channels per cell.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128785808","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: 8
Call control protocol for digital cellular radio interface 数字蜂窝式无线电接口的呼叫控制协议
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245306
H. Nakamura, K. Yamamoto, M. Yabusaki
{"title":"Call control protocol for digital cellular radio interface","authors":"H. Nakamura, K. Yamamoto, M. Yabusaki","doi":"10.1109/VETEC.1992.245306","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245306","url":null,"abstract":"The layer-three call control (CC) signaling protocol structure is discussed. CC is based on the Q.931 protocol in order to facilitate expansion of the services and interconnection with the ISDN. In Japan, a simple subset of Q.931 messages is provided in the first step in order to spread the digital mobile service nationwide in a short time. In the second step, CC will be expanded to offer all the services of Q.931, although, to ensure efficient signal transmission, they have been modified from Q.931 and Q.932 to reduce the message length and the number of messages in each procedure. As CC becomes more widely used, various basic and supplementary services can be provided.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116804175","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
Proposal of isomorphic emphasis in spectrum inversion of analog PM channels and its noise reduction effect 模拟PM信道频谱反演中同构重点的提出及其降噪效果
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245265
M. Kishi, T. Maeshima
{"title":"Proposal of isomorphic emphasis in spectrum inversion of analog PM channels and its noise reduction effect","authors":"M. Kishi, T. Maeshima","doi":"10.1109/VETEC.1992.245265","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245265","url":null,"abstract":"In order to guard against infringement of confidentiality in mobile communication, the idea of adding an encryption function to radio communications has been studied from various approaches. However, the existing methods have the defect that the frequency occupancy bandwidth is enlarged by the increase of effective modulation index, or that complicated circuits are implemented at huge cost. With such a background in mind, the authors establish an appropriate circuitry realization method and economical optimum configuration for isomorphic emphasis. Isomorphic emphasis suppresses the noise power well, even if a spectrum inversion encryption is introduced into PM transmission.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115193818","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
Propagation effects and countermeasures analysis in vehicle-to-vehicle communication at millimeter waves 毫米波下车对车通信的传播效应及对策分析
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245415
O. Andrisano, M. Chiani, M. Frullone, C. Moss, V. Tralli
{"title":"Propagation effects and countermeasures analysis in vehicle-to-vehicle communication at millimeter waves","authors":"O. Andrisano, M. Chiani, M. Frullone, C. Moss, V. Tralli","doi":"10.1109/VETEC.1992.245415","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245415","url":null,"abstract":"In the context of the European research projects, PROMETHEUS (EUREKA) and DRIVE, special attention has been paid to the possible implementation of short-range millimeter-wave communication systems. In fact, vehicle-to-vehicle communications represent one of the major areas of integrated road transport environment (IRTE) research. An analytical approach to the problem of defining and evaluating the performance limits when the system operates in an actual environment is presented. More precisely, the anomalous propagation due to road reflection and multipath propagation effects are considered in order to determine possible countermeasure techniques such as coding and diversity in order to define system availability.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"173 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123514183","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: 24
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