IEEE Communications Magazine

Issue 2 • Feb. 1990

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  • Adaptive equalization in magnetic-disk storage channels

    Publication Year: 1990, Page(s):14 - 29
    Cited by:  Papers (111)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1817 KB)

    The use of adaptive equalization to increase storage density is discussed. Adaptive equalization is attractive since it permits a significant reduction in manufacturing costs by allowing a greater component yield due to relaxed tolerances and also permits a reduction in servicing costs because of a reduced need for fine-tuning on the customer's premises. The differences between data storage and da... View full abstract»

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  • Visual telephony as an ISDN application

    Publication Year: 1990, Page(s):30 - 38
    Cited by:  Papers (36)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1349 KB)

    The key factors deterring the use of visual telephony are identified, and an overview of a typical system architecture is given. The video signal formats and video and audio coding algorithms used are described. Video codec implementation is considered, and an implementation based on application-specific integrated circuits is presented. In particular, three key signal processing modules in the vi... View full abstract»

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  • Frame alignment in a digital carrier system-a tutorial

    Publication Year: 1990, Page(s):47 - 54
    Cited by:  Papers (29)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (821 KB)

    Four key timing parameters that are used as performance measures are defined; reframe time, false in-frame time, out-of-frame detection time, and misframe time. Several strategies that improve frame alignment performance are considered for the case of a burst frame alignment word (FAW). With a little modification, the same strategies could also be applied to the case of a distributed FAW. The prob... View full abstract»

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  • Optical technologies for signal processing in satellite repeaters

    Publication Year: 1990, Page(s):55 - 64
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1485 KB)

    The evolution of modern communications satellites from the older cable-in-the-sky concept toward more intelligent architectures, exploiting onboard processing (OBP) techniques involving various technologies to improve the system performance and flexibility, is addressed. The key components in advanced communications satellite repeaters compatible with integrated optical device implementation are p... 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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Editor-in-Chief
Osman Gebizlioglu
Huawei Technologies