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Detachable mobile radio units for the 800 MHz land mobile radio system 用于800兆赫陆地移动无线电系统的可拆卸移动无线电单元
34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623228
K. Kobayashi, S. Nishiki, T. Taga, A. Sasaki
{"title":"Detachable mobile radio units for the 800 MHz land mobile radio system","authors":"K. Kobayashi, S. Nishiki, T. Taga, A. Sasaki","doi":"10.1109/VTC.1984.1623228","DOIUrl":"https://doi.org/10.1109/VTC.1984.1623228","url":null,"abstract":"Detachable mobile radio units, which can be used not only in a car but also as a portable radio unit outside the car, have been developed by the Electrical Communication Laboratories, NTT, for use in the existing 800 MHz mobile radio telephone system in Japan. This paper describes the circuit configuration and principal techniques to reduce volume, weight and power consumption for these detachable mobile radio units. The results of field tests carried out in the existing 800 MHz land mobile telephone system to evaluate effective antenna gain and practical service coverage are also presented.","PeriodicalId":178210,"journal":{"name":"34th IEEE Vehicular Technology Conference","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124868958","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
A proposed architecture for a mobile telephone system utilizing multi-beam satellite coverage 一种利用多波束卫星覆盖的移动电话系统架构
34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623246
K. Chaddock
{"title":"A proposed architecture for a mobile telephone system utilizing multi-beam satellite coverage","authors":"K. Chaddock","doi":"10.1109/VTC.1984.1623246","DOIUrl":"https://doi.org/10.1109/VTC.1984.1623246","url":null,"abstract":"Recent work toward direct-to-satellite mobile telephony has been pursued under the Canadian MSAT study. This paper outlines a system design utilizing a multi-beam coverage plan to meet the broad design objectives of efficient channel usage and flexible system configuration. Call routing, sharing of traffic loads amongst beams, interconnection, billing issues, and management of mobile units are discussed. Access to any voice channel from any geographic location allows a variety of call switching options and powerful loadsharing properties.","PeriodicalId":178210,"journal":{"name":"34th IEEE Vehicular Technology Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122594982","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 comparison of Gaussian minimum shift keying to frequency shift keying for land mobile radio 地面移动无线电高斯最小移位键控与频移键控的比较
34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623252
S.H. Goode
{"title":"A comparison of Gaussian minimum shift keying to frequency shift keying for land mobile radio","authors":"S.H. Goode","doi":"10.1109/VTC.1984.1623252","DOIUrl":"https://doi.org/10.1109/VTC.1984.1623252","url":null,"abstract":"Data is presented comparing Gaussian Minimum Shift Keying (GMSK) to Frequency Shift Keying (FSK) for use in the UHF land mobile radio band at 800 MHz. The FSK system uses a Gaussian premodulation filter set at one half the bit Pate. Deviation is set at 0.41 times the bit rate. The FSK receiver has an IF bandwidth of 1.0 times the bit rate and uses discriminator detection. The GMSK system uses coherent detection. Data is presented on the effect of premodulation cutoff frequency and receiver bandwidth on system sensitivity and spectral efficiency. From this data a relationship between channel spacing, frequency stability, IF bandwidth, and transmitter spectrum is derived. Additional data on the performance of the FSK and GMSK systems in Rayleigh fading is presented.","PeriodicalId":178210,"journal":{"name":"34th IEEE Vehicular Technology Conference","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127722282","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
AP-TAX, a terminal oriented computerized dispatching system AP-TAX，一个面向终端的计算机调度系统
34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623249
P. Rinck-Henriksen
{"title":"AP-TAX, a terminal oriented computerized dispatching system","authors":"P. Rinck-Henriksen","doi":"10.1109/VTC.1984.1623249","DOIUrl":"https://doi.org/10.1109/VTC.1984.1623249","url":null,"abstract":"This paper describes a terminal oriented computerized despatching system called AP-TAX. The mobile equipment, consisting of a mobile radio plus peripherals like taximeter, credit card reader, display and printer, is functionally described. The paper furthermore enlightens the data signalling on the two-way radio transmission path and gives information on the handling of data at the control centre. The paper finally decribes future extensions of the system.","PeriodicalId":178210,"journal":{"name":"34th IEEE Vehicular Technology Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130161515","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
RF energy deposition in operators of a portable data terminal 便携式数据终端操作员中的射频能量沉积
34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623238
Q. Balzano, O. Garay, T. Babij
{"title":"RF energy deposition in operators of a portable data terminal","authors":"Q. Balzano, O. Garay, T. Babij","doi":"10.1109/VTC.1984.1623238","DOIUrl":"https://doi.org/10.1109/VTC.1984.1623238","url":null,"abstract":"The methods and the instrumentation used to evaluate the exposure of users of portable RF transmitters are described in this paper. A simulated human, a robot positioner, and an RF-transparent implantable E-field probe are the instruments that allow the researcher to determine rapidly the peaks of the RF power absorption and the total power absorbed. The results of the measurements of the human exposure from a recently introduced Portable Data Terminal are described in detail.","PeriodicalId":178210,"journal":{"name":"34th IEEE Vehicular Technology Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121535727","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
Evaluation of performance of a proposed PRCS (Personal radio communication system) 拟建的个人无线电通信系统的性能评估
34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623243
V. Kolavennu, R. R. Duersch, H. L. Lester, C. Puckette
{"title":"Evaluation of performance of a proposed PRCS (Personal radio communication system)","authors":"V. Kolavennu, R. R. Duersch, H. L. Lester, C. Puckette","doi":"10.1109/VTC.1984.1623243","DOIUrl":"https://doi.org/10.1109/VTC.1984.1623243","url":null,"abstract":"Dynamic Computer Simulations of the proposed Personal Radio Communication System (PRCS) were undertaken to evaluate the performance of the system under various conditions of traffic dynamics, user behavior and propagation environment. The models employed characterize the user population, the PRCS configuration and proposed protocol. Performance measures include channel occupancy, reuse factor for the talk channels, calls cleared, average setup and failure times, and grade of service. The results include the expected grade of service for two metropolitan areas.","PeriodicalId":178210,"journal":{"name":"34th IEEE Vehicular Technology Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121042620","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
A new method of position and heading measurement of ground vehicle by use of laser and corner cubes 提出了一种利用激光和角立方测量地面车辆位置和航向的新方法
34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623275
T. Tsumura, N. Fujiwara, M. Hashimoto
{"title":"A new method of position and heading measurement of ground vehicle by use of laser and corner cubes","authors":"T. Tsumura, N. Fujiwara, M. Hashimoto","doi":"10.1109/VTC.1984.1623275","DOIUrl":"https://doi.org/10.1109/VTC.1984.1623275","url":null,"abstract":"This paper proposes an experimental system of position and heading finding of the ground vehicle by use of the laser and the corner cube prisms. This system is composed of; 1) three corner cubes are set on three reference points, and their co-ordinates are known previously. 2) the laser beam scanner, the laser beam receiver, the scanning angle measuring apparatus, and the micro-processor are set on the ground vehicle. 3) position and heading of vehicle are determined from the positioning informations of three reference points known previously, and the angle data of them measured using this system on the vehicle. Further, our experimental results using our proto-type experimental system are presented. Simulation results reveal that the movement of vehicle introduces the angle and positional errors, and some comments on reduction of these errors are also mentioned with discussions.","PeriodicalId":178210,"journal":{"name":"34th IEEE Vehicular Technology Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115503656","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
Lille metro: Description of the VAL control system 里尔地铁:VAL控制系统的描述
34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623271
F. Nakache
{"title":"Lille metro: Description of the VAL control system","authors":"F. Nakache","doi":"10.1109/VTC.1984.1623271","DOIUrl":"https://doi.org/10.1109/VTC.1984.1623271","url":null,"abstract":"The VAL System is designed to operate in a fully automatic mode. The primary objectives of this design were: - safety : the fail-safe concept is one of the major VAL principles; - dependability : an effective combination of redundancies and alternative operating modes is used to achieve a high system dependability; -high level of performance : the headway can be as low as 60 seconds including a 30- second dwell time; -a low cost of operation : minimum operating and maintenance personnel is required for service and trains are unmanned. The VAL control system design provides all automatic functions necessary to perform safe and reliable transportation of people over a wide range of operating conditions.","PeriodicalId":178210,"journal":{"name":"34th IEEE Vehicular Technology Conference","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133610298","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 method which optimizes frequency reuse in cellular radio systems 一种优化蜂窝无线电系统频率复用的新方法
34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623283
K. Suzuki, E. Niikura, N. Morita
{"title":"A new method which optimizes frequency reuse in cellular radio systems","authors":"K. Suzuki, E. Niikura, N. Morita","doi":"10.1109/VTC.1984.1623283","DOIUrl":"https://doi.org/10.1109/VTC.1984.1623283","url":null,"abstract":"Cellular Mobile Radio Systems require frequency reuse and cell splitting to effectively use the limited frequency spectrum and to facilitate system expansion. Various cell splitting techniques have been proposed to avoid the co-channel and adjacent-channel interference caused by the reuse of radio channels in cellular radio systems. The two major cell splitting techniques, thus far, are the four-cell repetition pattern and the seven-cell repetition pattern in which the cells are split into six sectors of 60 degrees or three sectors of 120 degrees respectively. The method presented in this paper has advantages in several aspects. In particular, it allows greater mobile density and higher efficiency on the radio channels due to the larger number of radio channels which can be assigned to each cell.","PeriodicalId":178210,"journal":{"name":"34th IEEE Vehicular Technology Conference","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132290727","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
Choosing the right converter system for electric tractive units equipped with threephase traction motors 为配备三相牵引电动机的电动牵引装置选择合适的变换器系统
34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623267
R. Wagner, H. Eisele
{"title":"Choosing the right converter system for electric tractive units equipped with threephase traction motors","authors":"R. Wagner, H. Eisele","doi":"10.1109/VTC.1984.1623267","DOIUrl":"https://doi.org/10.1109/VTC.1984.1623267","url":null,"abstract":"Due to the progress made in the field of thyristor converters, three-phase squirrel-cage induction motors have gained considerably in importance as traction motors for electric or diesel-electric railways. Two converter systems are now available for use in railway tractive units; (1) the voltage link converter using a pwm inverter as a machined-side unit; (2) the current link converter using a phase-sequence commutated inverter. A brief description of the modes of operation of the two inverter types is followed by a comparative evaluation of the technical characteristics important for railway applications and of the complexity and cost of the two converters. Both inverters are found to function satisfactorily, but the phase-sequence inverter has an advantage because it is less complex, more reliable and easier to protect. For the covering abstract of the conference see IRRD no 288720. (TRRL)","PeriodicalId":178210,"journal":{"name":"34th IEEE Vehicular Technology Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132728535","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
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