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IEEE Transactions on Broadcasting

Issue 1 • Mar 1990

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Displaying Results 1 - 13 of 13
  • Design of tube power amplifiers for optimum FM transmitter performance

    Publication Year: 1990, Page(s):46 - 64
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (820 KB)

    Tube amplifiers are extensively used in modern high-power FM broadcast transmitters. The power amplifier bandwidth affects not only the modulation performance, but also the transmitter's immunity to RF intermodulation. The tradeoffs involved and the choice of bandwidth are discussed. The design of tube power amplifiers for optimum FM performance requires careful considerations in the selection of ... View full abstract»

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  • Satellite data distribution in video transponder band-edge using 512 Kb/s SQAM

    Publication Year: 1990, Page(s):24 - 33
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    The experimental results of a one-month system field trial using a 512 kb/s superposed quadrature amplitude modulation (SQAM) satellite transceiver are described. The impact of cochannel and adjacent channel interference on the computer-simulated and measured performance of the band-edge system is investigated, and the corresponding bit error rate (BER) is analyzed. As an example application, Inte... View full abstract»

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  • High power broadcasting skywave transmitters interference analysis for navigation and communication systems

    Publication Year: 1990, Page(s):37 - 45
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    The operation of high-power broadcasting transmitters (Tx) can strongly interfere with collocated and even remote radio communication and navigation systems on broad frequency ranges. In these cases, extensive analysis and computation method developments are essential in order to assess the feasibility of reliable operation of indispensable radio communication links. The magnitudes of the interfer... View full abstract»

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  • X-ray emission from broadcast transmitters

    Publication Year: 1990, Page(s):14 - 23
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    During the past few years amplitude-modulated transmitters employing efficient pulse-width modulators have come into common use. These transmitters are reliable, relatively insensitive to vacuum tube characteristics, and offer excellent audio fidelity. Their architecture requires, however, supply voltages in the 20-30-kV range, which greatly enhances the production of ionizing radiation in the for... View full abstract»

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  • Colour error reduction in video systems

    Publication Year: 1990, Page(s):99 - 107
    Cited by:  Papers (4)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    The problems of achieving color fidelity in video systems are reviewed. Usually a correction matrix is appropriate for one illumination environment, but not necessarily others. A wide range of situations is examined, and, by use of 16 test colors, a matrix can be derived which gives good colorimetry for each. However, as the signal/noise ratio may be degraded, a matrix may be derived which gives a... View full abstract»

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  • Spectrum compatible high definition television

    Publication Year: 1990, Page(s):1 - 7
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    The spectrum compatible high definition television (SC-HDTV) system achieves the encoding of a 28.9 MHz source signal for transmission over a 6 MHz channel in the terrestrial TV broadcasting bands. The signal format reduces mutual interference between existing NTSC broadcasts and the high definition broadcasts, and therefore significant amounts of currently unused spectrum space can be used for si... View full abstract»

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  • An error-correcting coding scheme for teletext and other transparent data broadcasting

    Publication Year: 1990, Page(s):65 - 73
    Cited by:  Papers (2)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    Nonprimitive and primitive Reed-Solomon (RS) codes (and product codes based on them) that can provide a very low bit error rate (BER) for the transparent data broadcasting feature of North American broadcast Teletext Specification (NABTS) are described. Transparent data consist of 8-b bytes, each without a parity-check bit, as contrasted with nontransparent data, which consist of 8 bit bytes, each... View full abstract»

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  • Spectrum analysis of phase amplitude modulation

    Publication Year: 1990, Page(s):34 - 36
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    The theoretical possibility of producing a CSSB (compatible single-sideband) wave by phase amplitude modulation with a predistorter before the phase modulator is discussed. The rule for achieving good one-sideband suppression is examined. It is argued that adequate lower-sideband suppression of a CSSB wave can be achieved by a phase-amplitude modulation system with a predistorter View full abstract»

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  • HDTV and the vestigial sideband syndrome

    Publication Year: 1990, Page(s):8 - 13
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    Advanced TV (ATV) standards can only be made directly compatible with the 162 million existing TV receivers in the US by delivering the signals to the receiver on a vestigial sideband, amplitude modulated radio frequency carrier. However, low frequency group delays (due to phase error in the vestigial sideband filters required for modulated and demodulation) often generate a delayed edge effect th... View full abstract»

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  • The nocturnal service area of MF AM broadcast stations using vertical arrays

    Publication Year: 1990, Page(s):74 - 81
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    The nocturnal service area, or distortionless area, of MF AM broadcast stations depends on the radiation properties of the transmitting antenna and the physical constants of the ground surrounding the transmitting site. These ground constants limit the maximum antenna height and establish how large the nocturnal service area will be. In some instances the nocturnal service area can be increased by... View full abstract»

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  • Height radius effect on MF AM transmitting monopole antenna

    Publication Year: 1990, Page(s):82 - 88
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    Measurements are made on ground electrical field intensity in order to obtain a coefficient for the shadow, or diffraction factor. This factor permits the determination, with good accuracy, of the ground E field from the transmitting antenna to a point well beyond the radio horizon. The ground E field is of paramount importance in obtaining the nocturnal service area of an AM bro... View full abstract»

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  • An investigation of the design of a log-periodic dipole array with low side-lobe levels for broadcast applications

    Publication Year: 1990, Page(s):89 - 93
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The problem of cochannel interference is addressed. The ability of the Numerical Electromagnetics Code (NEC2) computer program to predict the radiation pattern of an antenna array on a mast is investigated. The evaluation and validation of NEC2 is undertaken by the comparison of measured and computed radiation patterns of log-periodic dipole antenna arrays. Emphasis is placed on the correspondence... View full abstract»

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  • Four-pole versus five-pole filter comparison

    Publication Year: 1990, Page(s):94 - 98
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Test results obtained on the prototype five-pole cavity filter as constructed to meet the requirements of the John Hancock Building (Chicago, Illinois) combiner project are presented. A comparison is made of the performance of that prototype filter with the results obtained using the standard four-pole filter. The five-pole filter was designed to use approximately 16-in square aluminum cavities wi... 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