IEEE Transactions on Vehicular Technology

Issue 4 • Nov. 1978

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Displaying Results 1 - 18 of 18
  • [Front cover and table of contents]

    Publication Year: 1978, Page(s): c1
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    Freely Available from IEEE
  • Guest editorial

    Publication Year: 1978, Page(s): 173
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  • Energy deposition in simulated human operators of 800-MHz portable transmitters

    Publication Year: 1978, Page(s):174 - 181
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (974 KB)

    The measured values of energy deposited in simulated human tissue exposed for one minute in the immediate vicinity of 800 MHz portable radio transmitters are presented. The deposited RF energy was evaluated by temperature measurements. The portable radio used in the tests had a 6-W experimental transmitter operating at 840 MHz. Two different antennas were tested for energy deposition: a sleeve dip... View full abstract»

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  • Propagation correlations at 900 MHz

    Publication Year: 1978, Page(s):182 - 189
    Cited by:  Papers (84)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (653 KB)

    The correlation in mean received power from four non-cosited 900 MHz sources is studied as a function of angle of arrival difference (AAD) at the mobile. Two tests are examined, one in the Washington-Baltimore area, and the other in the Chicago-Schaumburg area. Three hundred meter power averages were taken in Washington while 20 meter averages were obtained in Chicago. Weighted correlation coeffic... View full abstract»

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  • Urban path-loss characteristics at 820 MHz

    Publication Year: 1978, Page(s):189 - 197
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1764 KB)

    Results are presented of UHF propagation measurements conducted at 820 MHz in urban Philadelphia. The Philadelphia tests departed from previous path-loss measurements in that emphasis was placed on transmission from relatively low land-site antennas at heights of 40-70 feet above local ground level. Composite path-loss statistics have been derived for transmissions from five separate locations cov... View full abstract»

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  • Flat suburban area propagation at 820 MHz

    Publication Year: 1978, Page(s):198 - 204
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (943 KB)

    The results of a comprehensive mesurement program at 820 MHz designed to determine propagation characterstics in flat suburban terrain are presented. The data are organized to separate the effects of surface features, mobile antenna gain, and land-site antenna height, gain, and type (omnidirective and directive). The data have been collected using a digital data acquisition system to sample each o... View full abstract»

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  • 800-MHz band land mobile telephone system—Overall view

    Publication Year: 1978, Page(s):205 - 211
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (757 KB)

    The 800-MHz band land mobile telephone system which is going into service in Tokyo and other major cities is described. This system is characterized by 1) an ordered array of cells which allows each radio channel to be reused by spacing at an appropriate coordination distance in a wide service area (cellular system), 2) development of a new higher frequency band, and 3) a fully automatic exchange ... View full abstract»

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  • A periodic switching diversity technique for a digital FM land mobile radio

    Publication Year: 1978, Page(s):211 - 219
    Cited by:  Papers (19)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (733 KB)

    A simple and efficient diversity technique is proposed for use in a digital FM land mobile radio communication system. This technique receives two RF signals periodically by switching two antenna branches at a rate moderately higher than the bit rate. The improved bit error rate (BER) performance resulting from the use of diversity is shown to be the effect of transforming the probability density ... View full abstract»

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  • Periodic switching diversity effect on co-channel interference performance of a digital FM land mobile radio

    Publication Year: 1978, Page(s):220 - 223
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (333 KB)

    The effect of periodic switching diversity on the bit error rate (BER) performance of a binary frequency-shift keying (FSK) system in the presence of co-channel interference is described. The distribution of the signal-to-interference energy ratio per bit presented to the FM detector is found and the diversity effect on the BER performance in a Rayleigh fading environment is analyzed. The diversit... View full abstract»

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  • Control channel traffic design in a high-capacity land mobile telephone system

    Publication Year: 1978, Page(s):224 - 231
    Cited by:  Papers (15)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (774 KB)

    Control channel efficiency improvement techniques for an 800-MHz band high-capacity land mobile telephone system are described. Three interesting techniques, 1) the channel capacity increase technique under the random access mode from many mobiles, 2) a control channel division method which takes into account differences of control signal traffic behavior in land originated calls and mobile origin... View full abstract»

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  • Multitransmitter digital signal transmission by using offset frequency strategy in a land-mobile telephone system

    Publication Year: 1978, Page(s):231 - 238
    Cited by:  Papers (23)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (773 KB)

    In a high-capacity land-mobile telephone system which employs a small zone technique, it is advantageous to provide control channels separate from voice channels. We first review two control channel allocation methods: the individual control zone system and the multiple control zone system. From the viewpoints of efficient frequency utilization and reliable call processing, the multiple control zo... View full abstract»

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  • Mobile radio performance for a two-branch equal-gain combining receiver with correlated signals at the land site

    Publication Year: 1978, Page(s):239 - 243
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (331 KB)

    It has generally been accepted that in a two-branch diversity receiver a near maximum diversity advantage is realized when the cross correlation between the two branches is less than 0.7. Based on this figure, space diversity reception at the mobile presents little problem since the antenna separation distances that achieve this mount of decorrelation in the mobile environment are very small (X... View full abstract»

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  • Vehicle location in angular sectors based on signal strength

    Publication Year: 1978, Page(s):244 - 258
    Cited by:  Papers (1)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4773 KB)

    The results of field measurements carried out in center city Philadelphia and in the Whippany/Morristown, NJ suburban area to assess the accuracy of a vehicle location technique at 820 MHz based on signal strength comparison are described. Six co-sited directional antennas, each covering a 60° angular sector in azimuth, were used to detect the signal transmitted by the mobile. The angular loc... View full abstract»

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  • Testing of electronic industries association land-mobile communication antenna gain standards at the national bureau of standards

    Publication Year: 1978, Page(s):259 - 264
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1347 KB)

    The Electronic Industries Association has a published standard, EIA RS-329A, "Minimum Standards for Land-Mobile Communications Antennas," Dec. 1975. This standard details the minimum performance requirements and the test methods for evaluating the performance of fixed and base station antennas at frequencies from 25-1000 MHz. Also included in this standard are the specifications for a set of stand... View full abstract»

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  • A spread-spectrum technique for high-capacity mobile communications

    Publication Year: 1978, Page(s):264 - 275
    Cited by:  Papers (206)  |  Patents (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1154 KB)

    A spread-spectrum technique for cellular high-capacity mobile communications is described and some results from an analytic study are summarized. The technique uses a very large set of frequency-hopped signals which are designed for minimal mutual interference. No synchronization of the mobile units is required, and each user is permanently assigned his own signal, which serves as an identifying s... View full abstract»

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  • Mobile telephone control unit design guidelines for the advanced mobile phone service

    Publication Year: 1978, Page(s):276 - 281
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1565 KB)

    Mobile telephone control unit design guidelines for the Advanced Mobile Phone Service have been developed based on driving behavior, user preference, automobile environment, and calling procedure considerations. This paper explains these guidelines and illustrates their application by reviewing five control unit design approaches. View full abstract»

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  • A study of the effects of mobile telephone use and control unit design on driving performance

    Publication Year: 1978, Page(s):282 - 287
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1182 KB)

    Concern about the effects of mobile telephone use on driving control led to the development of a methodology for evaluating driving performance. A summary of the methodology is presented along with the results of a study comparing the effects of dialing a telephone to the effects of adjusting the car radio. A detailed account of a study of the effects of alternative control unit designs is provide... View full abstract»

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  • [Back cover]

    Publication Year: 1978, Page(s): c4
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    Freely Available from IEEE

Aims & Scope

IEEE Transactions on Vehicular Technology covers land, airborne, and maritime mobile services, vehicular electrotechnology, equipment, and systems identified with the automotive industry.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Nei Kato, Professor
Graduate School of Information Sciences (GSIS)
Tohoku University
Aramaki-Aoba 6-3-09, Aoba-ku, Sendai, 980-8579, JAPAN
Email: kato@it.is.tohoku.ac.jp