By Topic

IEEE Communications Magazine

Issue 7 • Date July 1989

Filter Results

Displaying Results 1 - 4 of 4
  • A pragmatic approach to trellis-coded modulation

    Publication Year: 1989, Page(s):11 - 19
    Cited by:  Papers (179)  |  Patents (55)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (870 KB)

    Since the early 1970s, for power-limited applications, the convolutional code constraint length K=7 and rate 1/2, optimum in the sense of maximum free distance and minimum number of bit errors caused by remerging paths at the free distance, has become the de facto standard for coded digital communication. This was reinforced when punctured versions of this code became the standard for rate 3/4 and... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The cellular environment of lightweight handheld portables

    Publication Year: 1989, Page(s):20 - 29
    Cited by:  Papers (94)  |  Patents (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1117 KB)

    The European cellular environment is described, and the types of cellular environments that are able to support lightweight handheld portables are addressed. Microcellular structures are considered, covering propagation measurements, rapid handover, interfacing with local area networks, and highway microcells with an overlaying macrocell. Narrowband transmission of subband-coded speech by 16-level... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Portable digital radio communications-an approach to tetherless access

    Publication Year: 1989, Page(s):30 - 40
    Cited by:  Papers (62)  |  Patents (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1336 KB)

    The evolution of current technologies that provide either wireless exchange access or access and communications to people away from their own telephones is outlined. A description is given of a proposed use of digital radio technology as a drop/distribution/loop technology for local exchange access and the integration of this radio technology with network intelligence to provide the added function... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Personal telephone services using IC-cards

    Publication Year: 1989, Page(s):41 - 48
    Cited by:  Patents (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (599 KB)

    An IC-card is a memory card that can be substituted for existing magnetic-striped cards. It is suggested that the IC-card, which can store various information for telephone calls, will become a useful device in multifunction telephone sets because of its portability, security, and large memory capacity. The information that should be stored on an IC-card is discussed, and the practicality of creat... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

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