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By Topic

Broadcasting, IEEE Transactions on

Issue 4 • Date Dec. 1988

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Displaying Results 1 - 9 of 9
  • Experience on operating a DBS system (BS-2) in Japan

    Publication Year: 1988 , Page(s): 430 - 434
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (472 KB)  

    In Japan, the direct broadcasting satellites BS-2a and BS-2b were launched in 1984 and 1986, respectively by NASDA (National Space Development Agency of Japan). Using the BS-2s, NHK (Japan Broadcasting Corporation) is gaining experience with direct broadcasting satellite service including high-definition TV coverage of the Seoul Olympics in 1988. The second generation satellite, BS-3a, is planned for launch in the summer of 1990. The authors discuss their four years of experience with operating satellite broadcasting carried out by NHK in collaboration with TSCJ (Telecommunication Satellite Corporation of Japan) and NASDA. Future plans are also outlined.<> View full abstract»

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  • The German TV-Sat broadcasting satellite system

    Publication Year: 1988 , Page(s): 435 - 438
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (394 KB)  

    The design concept, service and communication modules, and characteristics of the TV-Sat system are described. Also discussed are the solar array, propulsion and antenna modules as well as the high-power amplifier. A dual control system is used for the coarse pointing of the satellite's body (by infrared earth sensors) and the fine pointing of antenna reflectors. Fine pointing is done by an RF-sensor and 2 pointing mechanisms (APM). In the case of TV-Sat, 90% of the power is required by the payload; only the subsystems AOCS (attitude and orbit control system), TTC (telemetry, tracking and command system), and UPS are not dependent on the payload. The power required by these subsystems is supplied by the solar array structure with an output of 68 W/m/sup 2/ and 19.4 W/kg. The methods by which a high mean temperature is achieved and heat dissipation problems are examined. In-orbit tests with TV-Sat 1 are presented.<> View full abstract»

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  • Satellite receiver technologies

    Publication Year: 1988 , Page(s): 449 - 456
    Cited by:  Papers (3)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (824 KB)  

    The technical issues pertinent to direct broadcast satellite(DBS) reception are elucidated, dividing them into system and component-oriented subjects. The former include the relationship of DBS and TVRO (television receive-only) systems, TVRO technology, scrambling technology, PCM audio systems, MAC systems and HDTV. The latter are classified according to the path of the signal, that is, an antenna, LNB, and a receiver. Future trends are projected both for systems and components.<> View full abstract»

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  • Planar antennas for satellite reception

    Publication Year: 1988 , Page(s): 457 - 464
    Cited by:  Papers (9)  |  Patents (18)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (497 KB)  

    Direct broadcast satellite (DBS) reception requires a circularly polarized antenna with high gain and low axial ratio. Recently, various types of planar antennas have been studied and developed for DBS reception in the 12-GHz band. A summary is presented of properties and classification of planar antennas both commercialized and reported. The basic configurations, working principles, and performance of various planar antennas are described.<> View full abstract»

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  • Satellite broadcasting in Australia

    Publication Year: 1988 , Page(s): 425 - 429
    Cited by:  Patents (15)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (400 KB)  

    The operational features of the Australian domestic satellite system, AUSSAT, are discussed, particularly as they relate to broadcasting direct to communities and distribution to transmitters and studio centres of the Australian Broadcasting Corporation, ABC (Aus). Distribution of sound-only broadcasting programs is covered by the use of time-multiplexing using B-MAC. Comprehensive direct broadcasting from satellites is now available to many people living in remote areas of Australia who would otherwise receive minimal service. Initially, for each of the four major regions, ABC (Aus) has provided one television channel with stereophonic sound capability together with three different sound-only services, one of which is stereophonic. In addition to the `free' services of ABC (Aus), commercial broadcasting satellite services are being progressively introduced to the four regions View full abstract»

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  • Introduction to special issue on satellite broadcasting

    Publication Year: 1988 , Page(s): 421 - 424
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (252 KB)  

    A review is presented of the present status and the future of satellite broadcasting as well as the state of the art of direct-broadcast-satellite (DBS) technology, including the earth station. Satellite, TV program reception in various countries of the world is roughly classified into; (1) TV broadcasting services by means of a broadcasting satellite, and (2) reception of TV programs from communication satellites. In this context the author discusses the conditions covering satellite TV reception and the existing and planned services for Europe, North America, Asia, and the Middle East View full abstract»

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  • Commercial satellite broadcasting for Europe

    Publication Year: 1988 , Page(s): 443 - 448
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (764 KB)  

    A review is presented of the current television broadcasting situation in European countries, which involves a varied mix of terrestrial VHF or UHF systems and cable networks. A small market has emerged in Europe for receivers using the low-power telecommunications satellite transmission between the program providers and cable network companies. This is expected to change with the launch of medium-power pan-European telecommunication satellites (e.g. ASTRA, EUTELSAT II), which are now directly addressing the market of home reception. DBS (direct broadcast satellite) in the UK, using the D-MAC transmission standard, will offer three additional television channels, data broadcasting services, and a planned evolution to compatible forms of wide-screen, high-definition television. Comments are given on receiver and conditional access system standardization. Some views are expressed on satellite broadcasting as part of an overall broadcasting framework for the future View full abstract»

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  • Satellite broadcasting in France

    Publication Year: 1988 , Page(s): 439 - 442
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (284 KB)  

    A review is presented of the role to be played by direct broadcast satellite (DBS) in changing TV and radio broadcasting in France. In addition, the status of the TDF1 and TDF2 satellite program is assessed. Satellite design is discussed along with a description of the propulsion, service, solar array, communication and antenna modules. Services offered by the TDF1 and TDF2 system are presented. Finally, trends that DBS follow-on systems must cope with are given View full abstract»

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  • Application of coding and diversity to UHF satellite sound broadcasting systems

    Publication Year: 1988 , Page(s): 465 - 475
    Cited by:  Papers (1)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (668 KB)  

    Results are presented of a study of alternative means by which to reduce the required link margins in a satellite sound broadcasting system, thus improving the economic feasibility of the service and increasing the possibility of sharing a radio-frequency allocation with terrestrial services. Propagation models are presented that account for the effects of shadowing and multipath in the operating environments. Comparisons are made of the performance that results using time, frequency, and space diversity to moderate the effects of shadowing and multipath for vehicular and portable receivers. It is shown that space diversity has the broadest applicability in restoring the channel performance that would otherwise be degraded by Rayleigh fading channels and by quasistationary AWGN (additive white Gaussian noise) channels. Example link budgets are given for candidate satellite sound broadcasting system designs that use analog FM and digital modulation techniques 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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Yiyan Wu
Communications Research Ctr Canada