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Vehicular Technology, IEEE Transactions on

Issue 2 • Date May 1989

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Displaying Results 1 - 10 of 10
  • Error probability of M-ary FSK with differential phase detection in satellite mobile channel

    Publication Year: 1989 , Page(s): 76 - 85
    Cited by:  Papers (13)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (548 KB)  

    Formulas are derived for the error probability of M-ary frequency shift keying (FSK) with differential phase detection in a satellite mobile channel. The received signal in this channel is composed of a specular signal, a diffuse signal, and white Gaussian noise; hence, the composite signal is fading and has a Rician envelope. The error probability is shown to depend on the following syst... View full abstract»

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  • The effects of delay spread on 2-PSK, 4-PSK, 8-PSK and 16-QAM in a portable radio environment

    Publication Year: 1989 , Page(s): 43 - 45
    Cited by:  Papers (20)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (176 KB)  

    Computer simulation results are presented of a study of delay spread on digital modulations with different constellations in a quasi-static multipath radio channel. Unfiltered 2-, 4-, and 8-PSK and 16-QAM with a rectangular signaling pulse are compared first, followed by 4- and 16-QAM with a raised-cosine Nyquist pulse. The bit error rate performances averaged over fading samples under the influen... View full abstract»

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  • Idle-signal casting multiple access with data slot reservation (ICMA-DR) for packet radio communications

    Publication Year: 1989 , Page(s): 50 - 54
    Cited by:  Papers (2)  |  Patents (10)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (408 KB)  

    A population of terminals communicating with a central station over a packet-switched multiple access radio channel is investigated with regard to multiple access control schemes. The authors describe the ICMA-DR, which is an advanced idle-signal casting multiple access (ICMA) scheme characterized by data slot reservation. This improved central controlled multiple-access scheme for packet transmis... View full abstract»

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  • A novel array antenna for MSAT applications

    Publication Year: 1989 , Page(s): 86 - 94
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (672 KB)  

    The issue of reducing the cost of phased array vehicle antennas through the use of a lens feeding arrangement instead of phase shifters at each element is addressed. In particular, the economic viability of a mobile satellite system (MSAT) is largely dependent on the efficient use of the allocated scarce spectrum and orbit as well as the satellite power. The type of vehicle antenna used will play ... View full abstract»

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  • 800 MHz mobile radio propagation prediction using Kalman filtering techniques

    Publication Year: 1989 , Page(s): 55 - 68
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (884 KB)  

    A method is presented to derive a propagation model to predict the received median signal voltage for an 800-MHz mobile radio system. Results are given of an investigation into the performance of a particular model that was derived using this method. The method uses a Kalman filter that uses propagation measurements to derive a best fit for a particular propagation model to the measured data. The ... View full abstract»

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  • Spectrum efficiency in cellular [radio]

    Publication Year: 1989 , Page(s): 69 - 75
    Cited by:  Papers (89)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (468 KB)  

    The spectrum efficiency in cellular radio systems can be measured by a parameter that is called radio capacity. Using radio capacity, it is shown that splitting analog channels does not increase the spectrum efficiency in cellular radio systems, but that using digital cellular channels does. A simple evaluation method for judging spectrum efficiency in different digital systems is introduced. Also... View full abstract»

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  • Measurements of complex envelopes a mobile scenarios at 450 MHz

    Publication Year: 1989 , Page(s): 37 - 42
    Cited by:  Papers (5)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (388 KB)  

    The phase statistics of the narrowband mobile channel in an urban environment are measured and compared with theory. The phase derivative (the random FM frequency) follows closely a student's t-distribution with the Doppler spread as the determining parameter. Moving averages taken over 5-m lengths indicate the nonstationarity of the channel and the gradual shift between groups of reflect... View full abstract»

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  • Packet data transmission over mobile radio channels

    Publication Year: 1989 , Page(s): 95 - 101
    Cited by:  Papers (48)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (564 KB)  

    Since in mobile radio Rayleigh fading poses the main threat to accurate data transmission, a mathematical model of the dynamics of Rayleigh fading is used to explore the optimum duration of data packets. The performance criterion is the rate of information transfer through the mobile radio channel. In addition to packet size, the information rate depends on: the speed of the mobile terminal, the c... View full abstract»

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  • A linear induction motor control system for magnetically levitated carrier system

    Publication Year: 1989 , Page(s): 102 - 108
    Cited by:  Papers (17)  |  Patents (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (644 KB)  

    An electromagnetic suspension system has been developed that cuts off electric power-collecting devices from a magnetically levitated vehicle. This system makes it possible to transport materials with no mechanical contact at all between the vehicle and ground facilities. A control system for linear induction motors used in the magnetically levitated carrier system is described. The system was dev... View full abstract»

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  • Estimation of block error rates for NCFSK modulation on a VHF/UHF mobile radio channel

    Publication Year: 1989 , Page(s): 46 - 49
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (360 KB)  

    The authors present an evaluation of the block error rates (BKERs) for noncoherent frequency shift keying (NCFSK) modulation on a Rayleigh fading channel perturbed by additive white Gaussian noise (AWGN). In the past, such calculations have been carried out mostly under the assumption that the channel is very slowly fading, i.e. the received signal strength can be assumed constant over the whole b... View full abstract»

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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