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

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Blocking, hand-off and traffic performance for cellular communication systems with mixed platforms 混合平台蜂窝通信系统的阻塞、切换和流量性能
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245254
S. Rappaport, G. Monte
{"title":"Blocking, hand-off and traffic performance for cellular communication systems with mixed platforms","authors":"S. Rappaport, G. Monte","doi":"10.1109/VETEC.1992.245254","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245254","url":null,"abstract":"Cellular communication systems that support a mixture of platform types distinguished by different mobility characteristics are considered. A tractable analytical model for traffic performance analysis is developed using multidimensional birth-death processes and the method of phases. The framework allows consideration of homogeneous and nonhomogeneous systems, a broad class of dwell time distributions, and missed handoff initiations. Cut-off priority for handoffs and several platform types are considered to demonstrate the approach. The effects of different mobility parameters and of imperfect detection of handoff needs are examined. Theoretical performance characteristics are obtained. These exhibit carried traffic, handoff activity, blocking probability, and forced termination probability for each platform type. The realizable exchange of blocking for handoff performance is shown.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"51 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":"116307367","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: 131
Reed-Solomon coding and slow frequency hopping for narrowband digital cellular systems 窄带数字蜂窝系统的里德-所罗门编码和慢跳频
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245435
J. Ketchum, M. Wallace
{"title":"Reed-Solomon coding and slow frequency hopping for narrowband digital cellular systems","authors":"J. Ketchum, M. Wallace","doi":"10.1109/VETEC.1992.245435","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245435","url":null,"abstract":"The use of slow frequency hopping in conjunction with Reed-Solomon forward error correcting coding in cellular communication systems is investigated, and the capacity of a configuration which takes a TDMA channel structure as a starting point is discussed. The details of the encoding, receiver processing, decoding techniques, and power control measures on the forward link, required to provide high capacity for the two approaches, are also described. Simulations of the forward link, including two tiers of interferers, Rayleigh fading, and log-normal shadowing have been performed, and the resulting capacity estimates are given, and compared with the capacities of other digital cellular techniques.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"46 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":"127196357","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: 7
Spatial topology and dynamics in CDMA cellular radio CDMA蜂窝无线电的空间拓扑与动态
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245438
Jogeph Shapira, Padovmi
{"title":"Spatial topology and dynamics in CDMA cellular radio","authors":"Jogeph Shapira, Padovmi","doi":"10.1109/VETEC.1992.245438","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245438","url":null,"abstract":"The architecture and dynamics of a code-vision multiaccess (CDMA) cellular radio network are discussed. The network's layout, power control equation, cell coverage, signal quality, cell radio design, and heterogeneous cell clustering are described. It is shown that the CDMA system is adaptive to the channel and to the traffic load and offers flexibility in the network design and operation.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"30 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":"127540400","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: 29
Power control in packet switched time division duplex direct sequence spread spectrum communications 分组交换时分双工直接序列扩频通信中的功率控制
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245261
R. Esmailzadeh, M. Nakagawa, A. Kajiwara
{"title":"Power control in packet switched time division duplex direct sequence spread spectrum communications","authors":"R. Esmailzadeh, M. Nakagawa, A. Kajiwara","doi":"10.1109/VETEC.1992.245261","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245261","url":null,"abstract":"A packet switched time-division duplex direct-sequence spread-spectrum (DS-SS) communication system is proposed for operation in mobile and wireless indoor CDMA communications with Rayleigh fading characteristics. A power control method is then proposed for this system capable of providing effective estimates of the fading state of the channel and using this information to adaptively control the uplink transmission power for equalized received power at the base station. The performance of this power control scheme is evaluated by examining the distribution of the received power compared to a reference level for typical indoor communication system parameters.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"32 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":"127603815","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
Multipath simulation models for mobile radio channels 移动无线电信道的多径仿真模型
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245456
S. Gurunathan, K. Feher
{"title":"Multipath simulation models for mobile radio channels","authors":"S. Gurunathan, K. Feher","doi":"10.1109/VETEC.1992.245456","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245456","url":null,"abstract":"Several ray models with various delay profiles are analyzed to study their statistical compatibility with natural fading events and evaluated in terms of irreducible BER caused solely by the time delay spread. The results obtained from the analysis and computer simulation suggest that two-ray delay model (American Digital Cellular Standard) yields the worst-case BER performance compared to larger ray models with the same amount of RMS delay spread. For identical signal-to-ISI ratio yields lower irreducible BER. The results were obtained for coherent QPSK modulation. It is also shown that they can be readily applied for BPSK, pi /4-QPSK or GMSK.<<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":"129198180","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: 21
Design of adaptive equalizer utilizing the conjugate gradient method for a multipath land mobile communication 基于共轭梯度法的多径陆地移动通信自适应均衡器设计
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245370
Seungwon Choi
{"title":"Design of adaptive equalizer utilizing the conjugate gradient method for a multipath land mobile communication","authors":"Seungwon Choi","doi":"10.1109/VETEC.1992.245370","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245370","url":null,"abstract":"Alternative methods for designing an adaptive equalizer which efficiently reduces the frequency-selective fading arising in a land mobile communication system is presented. The procedure introduced utilizes the conjugate gradient method (CGM) for computing the optimal weights of the equalizer. For comparison purposes, numerical results of the recursive least square algorithm are presented. From the simulations, it is concluded that the proposed method shows comparable bit-error-rate (BER) performances spending relatively less computation time.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"19 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":"116597621","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
Field experiments on pilot symbol aided 16 QAM for land mobile communications 陆地移动通信导航符号辅助QAM的现场试验
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245292
S. Sampei, Y. Kamio, H. Sasaoka
{"title":"Field experiments on pilot symbol aided 16 QAM for land mobile communications","authors":"S. Sampei, Y. Kamio, H. Sasaoka","doi":"10.1109/VETEC.1992.245292","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245292","url":null,"abstract":"Field experimental results of pilot symbol aided 16 QAM for land mobile communications are reported. The performance of the implemented 16 QAM is evaluated by a 50% value of bit error rate and cumulative distribution of burst error length. The results are almost the same as the ones expected from the computer simulation and laboratory experiments. These results verify that the pilot symbol aided 16 QAM is effective to achieve high spectrally efficient digital land mobile communication systems.<<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":"117236830","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
Integrated terrestrial/satellite mobile system 地面/卫星综合移动系统
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245288
H. Lau, P.C.K. Liu, K.C. Li
{"title":"Integrated terrestrial/satellite mobile system","authors":"H. Lau, P.C.K. Liu, K.C. Li","doi":"10.1109/VETEC.1992.245288","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245288","url":null,"abstract":"An integrated terrestrial and satellite mobile system is proposed. The integrated system enables a mobile satellite terminal to access the satellite system inside the coverage of the terrestrial network (inside an urban area). The system architecture, call handling, performance analysis on the access, and transmission protocols are discussed. A preliminary mathematical model used to evaluate the message retransmission strategy and the expected delay on the signaling channels are addressed.<<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":"131252930","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
A preliminary performance evaluation of a linear frequency hopped modem 线性跳频调制解调器的初步性能评价
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245458
D. Purle, Andrew R Nix, Mark A. Beach, Joe McGeehan
{"title":"A preliminary performance evaluation of a linear frequency hopped modem","authors":"D. Purle, Andrew R Nix, Mark A. Beach, Joe McGeehan","doi":"10.1109/VETEC.1992.245458","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245458","url":null,"abstract":"The benefits of using linear modulation methods for a frequency hopping (FH) transmission system in narrowband, i.e., voice cellular networks, are considered. In particular, the use of a 16-level modulation scheme derived from 16 QAM combined with FH is evaluated operating in a channel subject to noise and multipath fading, characteristic of the mobile environment.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"49 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":"132706827","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: 18
Advantages of integrating a serial data link controller with CPU (vehicles) 将串行数据链路控制器与CPU(车辆)集成的优点
[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology Pub Date : 1992-05-10 DOI: 10.1109/VETEC.1992.245247
C. Lupini
{"title":"Advantages of integrating a serial data link controller with CPU (vehicles)","authors":"C. Lupini","doi":"10.1109/VETEC.1992.245247","DOIUrl":"https://doi.org/10.1109/VETEC.1992.245247","url":null,"abstract":"Various integrated circuits have been developed to perform the function of interfacing a microcontroller, or CPU, to the serial data network that ties each controller on a vehicle together. Until now these ICs have generally been stand-alone parts packaged separately from the host microcontroller. The cost and space advantages of combining the logic section (and possibly transceiver section) of a serial data link protocol handler, or serial data link controller, with the CPU core of a host microcontroller are explored. This approach allows the integration of other functions such as relay drivers and power regulators into a single integrated circuit.<<ETX>>","PeriodicalId":114705,"journal":{"name":"[1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology","volume":"7 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":"131834906","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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