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IEEE Communications Magazine

Issue 1 • Jan. 1988

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Displaying Results 1 - 6 of 6
  • G.722: a new CCITT coding standard for digital transmission of wideband audio signals

    Publication Year: 1988, Page(s):8 - 15
    Cited by:  Papers (34)  |  Patents (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    CCITT Study Group XVIII recognized the need for a new international coding standard on high-quality audio to allow interconnection of diverse switching, transmission, and terminal equipment and organized an expert group in 1983 to recommend an appropriate coding technique. A tutorial discussion is provided of the adaptive differential PCM (pulse-code modulation) coding method recommended by the gr... View full abstract»

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  • Voice-band data communication modems - A historical review: 1919-1988

    Publication Year: 1988, Page(s):16 - 27
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1285 KB)

    The history of voice-band data modems is divided into four periods, and the activities in each of these eras is discussed. Before the early 1950s, work was done on quantitatively measuring phase distortion and equalizing lines with such distortion. The advent of the digital computer in the early 1950s and the resulting military and commercial interest in large-scale data processing systems led to ... View full abstract»

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  • Optical and optoelectronic devices for optical fiber transmission systems

    Publication Year: 1988, Page(s):28 - 33
    Cited by:  Papers (4)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (583 KB)

    The present status and research trends in light sources, detectors, and various optical components are described, focusing mainly on those for single-mode fiber systems. Laser-diode and light-emitting-diode sources are described, and their problems and advantages are examined. The features of optical detectors, namely, avalanche and p-i-n photodiodes are discussed. A method of comparing the perfor... View full abstract»

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  • Implementation of a broadband integrated services hybrid network

    Publication Year: 1988, Page(s):34 - 43
    Cited by:  Papers (4)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (763 KB)

    The issues involved in the design of a broadband integrated services digital network (B-ISDN), that utilizes optical fibers in the subscriber loop, are considered. A hybrid scheme that provides integrated access to ISDN and broadband services by delivering voice/data signals in a digital format while using an analog format for full-motion video services to subscribers is proposed. The discussion c... View full abstract»

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  • Broadband local network developments in the UK

    Publication Year: 1988, Page(s):44 - 52
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (847 KB)

    The author provides a viewpoint on how broadband local network evolution might occur in the United Kingdom recognizing that worldwide developments will also have a significant influence. He first looks in some detail at the existing broadband situation, namely, cable TV, and considers how this relates to the telecommunications system, which, with its increasing use of fiber, is itself providing a ... View full abstract»

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  • Emerging technology and service enhancement for cordless telephone systems

    Publication Year: 1988, Page(s):53 - 58
    Cited by:  Papers (13)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (441 KB)

    A brief history of the development of cordless telephone systems in Japan is given. The efficient frequency utilization and upgraded service provided by this technology are discussed. A business cordless system is proposed for extended service areas using a portable telephone facility. The potential extension of this system to a local area portable telephone system is mentioned.<> View full abstract»

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Aims & Scope

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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Meet Our Editors

Editor-in-Chief
Osman Gebizlioglu
Huawei Technologies