IEEE Communications Magazine

Issue 7 • July 1997

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Displaying Results 1 - 12 of 12
  • Broadband Via Satellite

    Publication Year: 1997, Page(s): 28
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (227 KB)

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  • Optimum soft decision decoding with channel state information in the presence of fading

    Publication Year: 1997, Page(s):110 - 111
    Cited by:  Papers (9)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (345 KB)

    The article first presents the formulation for computing the optimum soft decision metrics for decoding of convolutional codes on fading channels and then demonstrate the performance gains achieved in using the optimum soft decision metrics. The optimum soft decision metrics use channel state information to account for signal strength variations due to fading. The formulation for computing the opt... View full abstract»

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  • Rayleigh fading channels in mobile digital communication systems .I. Characterization

    Publication Year: 1997, Page(s):90 - 100
    Cited by:  Papers (414)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2564 KB)

    When the mechanisms of fading channels were first modeled in the 1950s and 1960s, the ideas were primarily applied to over-the-horizon communications covering a wide range of frequency bands. The 3-30 MHz high-frequency (HF) band is used for ionospheric communications, and the 300 MHz-3 GHz ultra-high-frequency (UHF) and 3-30 GHz super-high-frequency (SHF) bands are used for tropospheric scatter. ... View full abstract»

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  • Onboard switching for ATM via satellite

    Publication Year: 1997, Page(s):66 - 70
    Cited by:  Papers (26)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (878 KB)

    This article presents an architecture for onboard ATM switching. The constraints of the space environment and the associated delays (especially with geostationary satellites) create often conflicting requirements for the implementation of ATM via satellite. These requirements must be considered when designing onboard equipment. The article suggests that the use of MF-TDMA framing and of physical-l... View full abstract»

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  • Trends in standardization on multimedia communications

    Publication Year: 1997, Page(s):112 - 116
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2618 KB)

    The authors describe the activities of telecommunication and information standardization organizations, such as the ITU-T, ISO/IEC JTC1, and ISO/IEC related to multimedia communications. Achievements of the related fora and consortia, such as the ATM Forum, IETF, and DAVIC, which play important roles in standardizing multimedia applications, are also described View full abstract»

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  • Traffic models in broadband networks

    Publication Year: 1997, Page(s):82 - 89
    Cited by:  Papers (228)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1097 KB)

    Traffic models are at the heart of any performance evaluation of telecommunications networks. An accurate estimation of network performance is critical for the success of broadband networks. Such networks need to guarantee an acceptable quality of service (QoS) level to the users. Therefore, traffic models need to be accurate and able to capture the statistical characteristics of the actual traffi... View full abstract»

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  • QoS guarantees for multimedia services on a TDMA-based satellite network

    Publication Year: 1997, Page(s):56 - 65
    Cited by:  Papers (57)  |  Patents (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (898 KB)

    This article describes a proposed network architecture for both the ground and space segments of a satellite network supporting multimedia services with quality of service (QoS) guarantees. The space segment proposal is geared toward a TDMA-based satellite network comprising many nongeostationary satellites, while the ground segment proposal does not put any restriction an the satellite network. T... View full abstract»

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  • Large-capacity multimedia systems

    Publication Year: 1997, Page(s):44 - 49
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1929 KB)

    The exponential growth of Internet use may result in a reduction of the grade of service of telecommunication networks. Capacity increase is the challenge to telecom operators. Communication satellites “see” a large customer population and provide a large: amount of-mainly entertainment-information. Interactive services are possible with enhanced communication satellite systems. Such s... View full abstract»

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  • Rayleigh fading channels in mobile digital communication systems .II. Mitigation

    Publication Year: 1997, Page(s):102 - 109
    Cited by:  Papers (22)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1752 KB)

    For pt. I see ibid., vol. 35, no. 7, p. 90, 1997. In Part I of this tutorial, the major elements that contribute to fading and their effects in a communication channel were characterized. In Part II, these phenomena are briefly summarized, and emphasis is then placed on methods to cope with these degradation effects. Two particular mitigation techniques are examined: the Viterbi equalizer implemen... View full abstract»

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  • ATM local area networks: a survey of requirements, architectures, and standards

    Publication Year: 1997, Page(s):72 - 80
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1458 KB)

    There is increasing interest in deploying ATM technology in local or campus networks. ATM is an ideal technology to overcome many of the limitations of today's LAN technologies. This article focuses on the application of ATM in the LAN environment to interconnect high-end host computers, and on the interworking of ATM-based LANs with legacy LANs. The authors introduce ATM LAN requirements, followe... View full abstract»

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  • Quality estimation of PSK modulated signals

    Publication Year: 1997, Page(s):50 - 55
    Cited by:  Papers (20)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1300 KB)

    The use of the Ka band (30/20 GHz) for satellite communication systems raises the problem of dealing with rain attenuation. A very important problem in fade countermeasure systems is the need to detect signal quality quickly and accurately. In fact, the countermeasure has to be initiated before the signal degradation effect an the bit error rate is detected by the user. This article presents an ov... View full abstract»

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  • Satellite ATM networks: a survey

    Publication Year: 1997, Page(s):30 - 43
    Cited by:  Papers (89)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3515 KB)

    Satellite ATM networks have significant advantages over terrestrial ATM networks. Satellites provide unique advantages such as remote coverage with rapid deployment, distance insensitivity, bandwidth on demand, immunity to terrestrial disasters, and offering broadband links. Satellite ATM networks will play an important role in the rapidly evolving information infrastructure. However, there are se... View full abstract»

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IEEE Communications Magazine, considered by most to be their most important member benefit, provides timely information on all aspects of communications: monthly feature articles describe technology, systems, services, market trends, development methods, regulatory and policy issues, and significant global events.

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Osman Gebizlioglu
Huawei Technologies