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IEEE Transactions on Broadcasting

Issue 1 • Mar 1997

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Displaying Results 1 - 13 of 13
  • Digital linearizer for RF amplifiers

    Publication Year: 1997, Page(s):12 - 19
    Cited by:  Papers (26)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (772 KB)

    Broadcast technology is at the beginning of a new era. It is characterized by the intensive use of the most advanced digital modulation formats (8VSB, QAM, OFDM) in combination with high power RF amplifiers. To date the linearity required for these digital formats has only been accomplished in cumbersome low efficiency class A amplifier or even more cumbersome feed-forward systems. A potentially m... View full abstract»

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  • A primer for digital television RF facility design and construction

    Publication Year: 1997, Page(s):3 - 11
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    With the release of the FCC's (Federal Communications Commission) Sixth Further Notice of Proposed Rulemaking, many television broadcasters are concerned about the design and reconstruction considerations for digital television (DTV). This paper discusses some of these considerations and reviews some of the basic design criteria for a digital television transmission system View full abstract»

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  • VPSK and VMSK modulation transmit digital audio and video at 15 bits/sec/Hz

    Publication Year: 1997, Page(s):96 - 103
    Cited by:  Papers (23)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    Bandwidth efficiencies that have not been possible in the past are now being achieved using variable PSK (VPSK) and variable MSK (VMSK) modulation without the loss of signal power that normally accompanies high bandwidth efficiency methods. Theoretically, these two methods do not lose any signal energy with increasing bandwidth compression. Efficiencies up to 15 bits/sec/Hz are now being achieved ... View full abstract»

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  • A semi empirical model for low latitude HF ionospheric propagation prediction

    Publication Year: 1997, Page(s):89 - 95
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    The ionospheric propagation of high frequency (HF) radio waves is strongly dependent on the varying structure of the ionosphere. It is therefore essential to look for an accurate and suitable physical model for the design and development of telecommunication links, especially broadcast links, which are affected by such variation. This enables the prediction of radio link performance with a satisfa... View full abstract»

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  • Theoretical computation of the coverage probability of a digital TV transmitter in an analogue TV network using a stochastic approach

    Publication Year: 1997, Page(s):20 - 25
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    A theoretical computation method for a digital TV transmitter coverage probability is proposed. The computation make use of the assumption that the studied digital TV transmitter is sharing a co-channel frequency band with six surrounding analogue TV transmitters whose arriving signals are considered as co-channel uncorrelated interferers. Coverage probability expressions have been derived conside... View full abstract»

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  • Performance of a digital stereo FM modulator with reduced output resolution

    Publication Year: 1997, Page(s):104 - 113
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    A digital stereo FM modulator has been built using a direct digital synthesiser (DDS). The system incorporates a digital stereo generator to provide the modulating signal. The stereo generator was sampled at 228 kHz and interpolation by 2 was carried out to move the unwanted FM sidebands further away from the FM carrier, in order to facilitate filtering. The paper presents the effects of quantisat... View full abstract»

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  • On an absolute evaluation method of the quality of television sequences

    Publication Year: 1997, Page(s):26 - 35
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    This paper describes the reliability of scores obtained in subjective evaluation tests of picture quality using the double-stimulus continuous quality-scale method (the DSCQS method) and the single-stimulus five-grade quality scale method (the SSQS method). First, it is shown that the mean scores with the absolute scale of the DSCQS method do not extend to a higher grade, unlike those with the SSQ... View full abstract»

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  • Fuzzy stochastic gradient decision feedback equalizer for VSB terrestrial HDTV broadcasting

    Publication Year: 1997, Page(s):36 - 46
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    We present a fuzzy stochastic gradient (FSG) decision feedback equalizer (DFE) for VSB terrestrial HDTV broadcasting. This equalizer employs a well-designed fuzzy Takagi-Sugeno (1985) model to automatically regulate the step size of the descent gradient vector, combining a fast convergence rate and a low excess mean square error (MSE). The only penalty paid is a slight increase in the computationa... View full abstract»

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  • Cross-correlated correlative encoding: an efficient modulation method

    Publication Year: 1997, Page(s):47 - 55
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (788 KB)

    A new cross-correlated correlative baseband encoding scheme is presented as a means of doubling the capacity of a mobile communication systems without the cost of complex baseband filtering. System performance is studied in a non-linear amplified channel for 6 to 9 dB improved power efficiency. The system is analyzed for spectrum efficiency, adjacent channel interference (ACI), co-channel interfer... View full abstract»

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  • An adaptive propagation prediction program for land mobile radio systems

    Publication Year: 1997, Page(s):56 - 63
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    This paper describes the development of an adaptive RF propagation prediction program for land mobile radio systems. The program, which allows the user to specify transmitted signal strength, carrier frequency, base station antenna height, and mobile vehicle antenna height also provides the information necessary to determine a level of confidence for its predictions. In lieu of detailed topographi... View full abstract»

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  • Performance evaluation of COFDM for digital audio broadcasting. I. Parametric study

    Publication Year: 1997, Page(s):64 - 75
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1108 KB)

    This paper describes the performance of COFDM (coded orthogonal frequency division multiplexing) for digital audio broadcasting (DAB) over various multipath mobile radio channels. COFDM is a channel coding and modulation scheme which mitigates the adverse effects of fading by using wideband multicarrier modulation combined with time interleaving and a convolutional error correcting code. A guard i... View full abstract»

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  • Real time teletext broadcast system performance enhancement using ghost rows

    Publication Year: 1997, Page(s):76 - 82
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    Teletext is a one way broadcast system which provides a variety of services to its users. A one way broadcast system is attractive because a single transmission of a piece of information satisfies all potential users of that information. The main drawback of these types of systems is that a user must wait until the required information arrives. Therefore, the access time is an important considerat... View full abstract»

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  • A personal monitor using a surface area sensor

    Publication Year: 1997, Page(s):83 - 88
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    A personal electromagnetic radiation monitor having a surface area sensor to detect the radial electric field component directly from the radiating antenna or a secondary radial field component created by the current induced in the wearer of the personal monitor who is illuminated by the electromagnetic field is presented. The measurement of low frequency electric (E) fields in the presence of a h... View full abstract»

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Aims & Scope

IEEE Transactions on Broadcasting covers the field of broadcast technology, including the production, distribution, transmission, and propagation aspects of broadcasting.

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Meet Our Editors

Editor-in-Chief
Yiyan Wu
Communications Research Ctr Canada