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IEEE Communications Magazine

Issue 4 • Date April 1999

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Displaying Results 1 - 16 of 16
  • An overview of the satelite and space communications committee

    Publication Year: 1999, Page(s):1 - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (565 KB)

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  • Design patterns in communications software [Guest Editorial]

    Publication Year: 1999, Page(s):32 - 33
    Cited by:  Papers (2)
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    Freely Available from IEEE
  • Systems and circuits for broadband communications [Guest Editorial]

    Publication Year: 1999, Page(s): 70
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    Freely Available from IEEE
  • Very-high-speed digital subscriber lines

    Publication Year: 1999, Page(s):72 - 79
    Cited by:  Papers (37)  |  Patents (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1384 KB)

    VDSL services are overviewed with an emphasis on the basic architecture, applications, and data rates, as well as the technological challenges of design. Discussions of the telephone line environment, radio-band interference ingress and egress, impulse noise, and symmetric and asymmetric multiplexing are included, along with brief descriptions of two popular implementations View full abstract»

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  • Design patterns in telecommunications system architecture

    Publication Year: 1999, Page(s):40 - 45
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (944 KB)

    The telephone network could be called the world's first distributed computing network. People in telecommunications treat as second nature many of the issues just surfacing in other problem domains. This article describes some of the techniques used in the telecommunications industry to deal with highly distributed high-reliability systems. A number of recurring patterns are identified and used to... View full abstract»

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  • Managing change with patterns

    Publication Year: 1999, Page(s):37 - 39
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    Costs associated with modifying software are a large part of an organization's software development budget. Since change is to be expected, the costs associated with change can be reduced by preparing for it. Software design patterns associate a problem and context with a solution to document good design practices. Patterns allow software designers to evaluate solutions in terms of the aspects of ... View full abstract»

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  • An overview of selected call processing patterns

    Publication Year: 1999, Page(s):64 - 69
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    The call processing component of a switching system is responsible for setting up basic calls between external interfaces and for providing a broad range of supplementary services such as call forwarding, conference calling, and call waiting. This article discusses software design techniques that address some of the challenges faced when developing a call processing system. Each of these technique... View full abstract»

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  • Patterns: a way to reuse expertise

    Publication Year: 1999, Page(s):34 - 36
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    There has been a sense in the software engineering community that we are continually reinventing the wheel. This phenomenon can be clearly seen in any large company; where projects go their own way, solving problems that are similar or identical to problems being solved by other projects, sometimes down adjacent corridors in the same building. It is easy to point at a lack of communication and the... View full abstract»

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  • Applying patterns to develop extensible ORB middleware

    Publication Year: 1999, Page(s):54 - 63
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1840 KB)

    Distributed object computing forms the basis for next-generation application middleware. At the heart of distributed object computing are object request brokers (ORBs), which automate many tedious and error-prone distributed programming tasks. This article presents a case study of key patterns used to develop ORBs that can be dynamically configured and evolved for specific application requirements... View full abstract»

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  • Fully monolithic CMOS RF power amplifiers: recent advances

    Publication Year: 1999, Page(s):94 - 98
    Cited by:  Papers (9)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    The transmit RF power amplifiers remain one of the most challenging building blocks for wireless transmitters. This article is intended to provide the reader with an understanding of the basic operation of Class A, B, AB, and C RF power amplifiers. With the numerous advantages associated with highly integrated transceiver implementations in mind, some examples of designs of integrated power amplif... View full abstract»

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  • Synchronization with DMT modulation

    Publication Year: 1999, Page(s):80 - 86
    Cited by:  Papers (55)  |  Patents (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (944 KB)

    In a digital transmission system, synchronization is an essential receiver function. Accurate timing information must be known to the demodulator in order to produce reliable estimates of the transmitted data sequence. In this article, synchronization for discrete multitone transmission (DMT) is examined. The effect of imperfect timing on the receiver performance is investigated. An overview of ti... View full abstract»

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  • OpenWebServer: an adaptive Web server using software patterns

    Publication Year: 1999, Page(s):46 - 52
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    The explosive growth of the Web requires servers to be extensible and configurable. This article describes our adaptive Web server, OpenWebServer, which uses the Reflection architectural pattern. The server supports the dynamic adoption of functionality, such as introducing additional protocols, modifying execution policies, and tuning system performance. This is achieved by specifying and coordin... View full abstract»

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  • Decoding in analog VLSI

    Publication Year: 1999, Page(s):99 - 101
    Cited by:  Papers (24)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The iterative decoding of state-of-the-art error correcting codes such as turbo codes is computationally demanding. It is argued that analog implementations of such decoders can be much more efficient than digital implementations. This article gives a tutorial introduction to research on this topic. It is estimated that analog decoders can outperform digital decoders by two orders of magnitude in ... View full abstract»

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  • Blind equalization for broadband access

    Publication Year: 1999, Page(s):87 - 93
    Cited by:  Papers (17)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (716 KB)

    This article discusses the general principles of blind equalization and its use in emerging broadband access applications such as FTTC and xDSL. New results obtained for these applications are also presented View full abstract»

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  • Claude E. Shannon: the 50th anniversary of information theory

    Publication Year: 1999, Page(s):102 - 105
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (764 KB)

    Although experts recognized immediately the importance of the ideas addressed in the article “A mathematical theory of communication” by Claude E. Shannon, it was not until the 1970s that their full capacity could be exploited with the advent of integrated circuits, and today's computer and communications equipment would be unimaginable without Shannon's contribution. The 50th annivers... View full abstract»

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  • The origins of the sampling theorem

    Publication Year: 1999, Page(s):106 - 108
    Cited by:  Papers (44)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    The publications of Claude E. Shannon brought the sampling theorem to the broad attention of communication engineers. This article demonstrates how practicians, theoreticians, and mathematicians discovered the implications of the sampling theorem almost independent of one another 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.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Osman Gebizlioglu
Huawei Technologies