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Vehicular Technology, IEEE Transactions on

Issue 2 • Date May 1986

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Displaying Results 1 - 7 of 7
  • [Front cover and table of contents]

    Page(s): c1
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    Freely Available from IEEE
  • Automobile navigation using a magnetic flux-gate compass

    Page(s): 41 - 47
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    The classic technology of the saturable core may be combined with the microcomputer to yield an improved version of the magnetic flux-gate compass. General description and fundamental principles are discussed with application to mass-produced automobiles. A transfer function between the earth's magnetic field and the fluxgate output voltages is developed. The introduction of the microcomputer allows a faster calibration which does not require any type of nulling or feedback circuit. View full abstract»

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  • Elements of cellular mobile radio systems

    Page(s): 48 - 56
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    A major concern in a cellular mobile radio system is the co-channel interference. Therefore, the reduction of co-channel interference becomes a main thrust for the system design engineers. We use the co-channel interference reduction factor as a design criterion and predict the signal-to-interference (S/I) ratios in different system configurations. The handoff mechanism and algorithmic considerations, the traffic capacity and procedure for splitting cells, and the near-end-to-far-end ratio interference and reduction are the elements described. View full abstract»

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  • Vertical radiation patterns of mobile antenna in UHF band

    Page(s): 57 - 62
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    Theoretical and experimental studies are made on radiation patterns of mobile antennas within the frequency range from 300 to 900 MHz. In order to calculate vertical plane patterns of quarter wavelength monopole and a half-wavelength dipole located on an automobile's roof, a theoretical model of an automobile body is developed, in conjunction with the geometrical theory of diffraction (GTD). The theoretical model consists of three-perfectly conducting plates. It is ascertained from a comparison between calculated and measured results for the feed point impedance and the radiation pattern that the effect of the body and the earth can be well examined with the theoretical model. The results of pattern calculation for the above two antennas show that the radiation patterns depend largely on the configuration of the automobile body and the earth condition. The technique described in this paper can be used as a design tool to estimate radiation performance of mobile antennas. View full abstract»

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  • Dual-pilot tone calibration technique

    Page(s): 63 - 70
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    Pilot-based calibration techniques are used to reduce the effects of multipath fading in mobile satellite receivers. One of the more recent of these techniques, namely the tone calibration technique (TCT), suggests transmitting double sideband modulation with the pilot tone located at the center of its spectrum where the amplitude and phase characteristics of the channel are most stable. To "make room" for the pilot in the presence of the Doppler shift, the equivalent low-pass data sidebands must be shaped so as to have zero response in the neighborhood of dc. Other techniques such as transparent tone-in-band (TTIB) similarly "notch out" a hole in the center of the data spectrum for location of the pilot. An alternate possibility which is at the same time much more bandwidth efficient than TCT is a dual-pilot tone calibration technique (DPTCT) that symmetrically locates a pair of pilots outside the data spectrum near the band edges of the channel. The operation and performance of DPTCT are analyzed, and its effectiveness is compared to that of the single tone TCT technique. View full abstract»

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  • Analysis of GMSK with discriminator detection in mobile radio channels

    Page(s): 71 - 76
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    Discriminator detection of Gaussian minimum shift keying in a land mobile radio environment is analyzed. Simple closed-form expressions for the average probability of error are presented and evaluated for cases of practical interest. View full abstract»

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  • [Back cover]

    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.

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Meet Our Editors

Editor-in-Chief
Yuguang Michael Fang
University of Florida