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IEEE Transactions on Broadcasting

Issue 3 • Sept. 2001

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Displaying Results 1 - 13 of 13
  • Commentary - planning factors redux

    Publication Year: 2001
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6 KB) | HTML iconHTML

    The concept of planning factors for the Grade A and Grade B service contours for the current analog NTSC television service, described in this paper, were also employed for the establishment of the service parameters developed by the FCC's Advisory Committee on Advanced Television Service (ACATS). There were, of course, several significant differences in the parameters adopted. Because of the perc... View full abstract»

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  • Understanding television's grade A and grade B service contours

    Publication Year: 2001, Page(s):309 - 314
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB) | HTML iconHTML

    The Grade A and Grade B service contours of a television broadcast station are used for a host of administrative purposes by the FCC including the regulation of CATV systems. Additionally, the contours are used by most stations for promotional and marketing purposes. The numerical values associated with these contours represent levels of field strength; consequently, assumptions were made in their... View full abstract»

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  • Short medium frequency AM antennas

    Publication Year: 2001, Page(s):263 - 284
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB) | HTML iconHTML

    Short antennas have again attracted broadcaster attention. These kinds of antennas have been used since the 1920s. At that time it was the logical antenna as a new application of this service after more than twenty years of telegraphic transmissions. Telegraphic transmissions were the most important radio communication service at that time, and because of the long range needed the lowest frequenci... View full abstract»

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  • A method to determine the detuning reactance for unused elements in directional arrays

    Publication Year: 2001, Page(s):259 - 262
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (73 KB) | HTML iconHTML

    This paper provides insight into the basics of radiation from unused elements in MF broadcast directional arrays. It then sets forth the criteria for suppressing that radiation and suggests a method for meeting those criteria. Component values are determined by post processing the NEC output file. Numerical examples demonstrate both the simple and complex cases. Some limitations to practical appli... View full abstract»

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  • Adjacent and co-channel interference from direct sequence spread spectrum systems on analog PAL

    Publication Year: 2001, Page(s):297 - 307
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (402 KB) | HTML iconHTML

    This paper presents extensive results of a laboratory test held to examine the conditions under which analog PAL-G and spread spectrum systems can share spectrum. RF TV protection ratios for adjacent and co-channel spread spectrum interference are derived. For the PAL signal two different received levels, giving undistorted baseband SNR 42 and 37 dB respectively, are examined. Different spread spe... View full abstract»

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  • Reradiation (echo) analysis of a tapered tower section supporting a side-mounted DTV broadcast antenna and the corresponding azimuth pattern

    Publication Year: 2001, Page(s):249 - 258
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (445 KB) | HTML iconHTML

    Reradiation from a non-vertical obstruction such as a tapered section of a broadcast antenna supporting tower is analyzed. The reradiation takes on the form of a cone, which is symmetrical about the tower leg axis, modified by the reflection coefficient that varies with azimuth. The reradiation is directed either above the horizon where it is lost or below the horizon where it interferes as an ech... View full abstract»

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  • Using elevated radials with grounded towers

    Publication Year: 2001, Page(s):292 - 296
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (97 KB) | HTML iconHTML

    This paper describes a technique in which elevated horizontal radials are used in combination with a grounded quarter-wave tower to construct an AM-broadcast transmit antenna. Computer analysis indicates that the radiation efficiency of these antennas can be within one decibel of that of a conventional base-insulated 1/4-wave tower with an extensive buried-radial ground system View full abstract»

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  • Multicast routing strategies for zoned VP-based ATM networks

    Publication Year: 2001, Page(s):240 - 248
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (514 KB) | HTML iconHTML

    In ATM networks, the concept of virtual path (VP) greatly simplifies cell processing in switches. The virtual channel connection (VCC) can be more quickly and efficiently established by good strategies of resource management. The method of constructing virtual path and the strategies of managing and allocating resources greatly affect the performance of the system operation. We propose a new archi... View full abstract»

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  • MF AM antenna radiation pattern verification method by near field measurements

    Publication Year: 2001, Page(s):285 - 291
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (335 KB) | HTML iconHTML

    No other component of a broadcast system offers as many options in terms of performance and efficiency as the antenna system. The radiation pattern of a MF (medium frequency) antenna is one of the major characteristics to describe the performance of the system. To optimize the reach and effectiveness of broadcast antennas and to prove regulatory compliance it is essential to know their radiation p... View full abstract»

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  • Spatial diversity analysis for digital TV systems

    Publication Year: 2001, Page(s):198 - 206
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (274 KB) | HTML iconHTML

    Spatial diversity for digital TV systems has been studied using the results of a measurement campaign of the radio channel complex frequency response for two different situations: an outdoor-indoor channel and an indoor-indoor channel. It is shown that the actual improvement of spatial diversity is not only the mean level increase, but the reduction of both the level crossing rate (LCR) and the av... View full abstract»

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  • DTV coverage and service prediction, measurement and performance indices

    Publication Year: 2001, Page(s):207 - 217
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (346 KB) | HTML iconHTML

    It is now clear that methods used to predict the replication of the NTSC service in the United States were idealized and, for the most part, not validated. The need to review the methods and procedures now in use is highlighted by the various field tests conducted in the U.S. and elsewhere. This paper outlines potential improvements in the modeling, methods and procedures now in use for prediction... View full abstract»

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  • 60 GHz band 64 QAM/OFDM terrestrial digital broadcasting signal transmission by using millimeter-wave self-heterodyne system

    Publication Year: 2001, Page(s):218 - 227
    Cited by:  Papers (14)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (443 KB) | HTML iconHTML

    This paper describes the first time experimental studies on 60-GHz band transmissions of terrestrial digital broadcasting signals (ISDB-T) with 64-QAM modulations on coded orthogonal frequency division multiplexing (COFDM) format. It has been a very difficult experiment to accomplish because it requires very stable and low phase-noise oscillators in the millimeter-wave band. The use of our propose... View full abstract»

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  • BER computation of 4/M-QAM hierarchical constellations

    Publication Year: 2001, Page(s):228 - 239
    Cited by:  Papers (64)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (341 KB) | HTML iconHTML

    Hierarchical constellations offer a different degree of protection to the transmitted messages according to their relative importance. As such they found interesting application in digital video broadcasting systems as well as wireless multimedia services. Although a great deal of attention has been devoted in the literature to the study of the bit error rate (BER) performance of uniform quadratur... 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