By Topic

IEEE Communications Magazine

Issue 11 • Date Nov. 1991

Filter Results

Displaying Results 1 - 10 of 10
  • Smaller cells for greater performance

    Publication Year: 1991, Page(s):19 - 23
    Cited by:  Papers (83)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (558 KB)

    A microcell architecture that reduces interference, increases system capacity, improves voice quality, and demands fewer handoffs is described. The system is easy to implement and poses a very low risk investment. Its capacity and voice quality are analyzed. Capacity, based on the K=3 system (K is the cell reuse factor), is 2.33 times higher than the existing analog system of K=7. This microcell s... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Mobile satellite communications systems: Toward global personal communications

    Publication Year: 1991, Page(s):24 - 30
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (747 KB)

    The constraints imposed by the RF environment are reviewed. An overview of present and planned mobile satellite systems is given. Present systems refer to those already in operation, while planned systems refer to those that have authority to offer the services and have either a satellite in orbit or one being built to support the systems. Future directions for mobile satellite communications syst... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Mobile satellite services for travellers

    Publication Year: 1991, Page(s):32 - 35
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (462 KB)

    The services offered by INMARSAT are described. INMARSAT is the only organization providing satellite communications services worldwide to all modes of transportation by air, land, and sea. At the same time the wide range of its membership, comprising 64 countries (including both the United States and the Soviet Union) has meant that the technical standards adopted by INMARSAT are recognized inter... View full abstract»

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

    Publication Year: 1991, Page(s):36 - 40
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (430 KB)

    AUSSAT Proprietary Ltd.'s planned mobilesat mobile satellite communication system is described. Mobilesat will use ISDN-like features to bring advanced mobile voice and data services to travelers in Australia's Outback. The key issues AUSSAT addressed in implementing its service are addressed. The importance of providing integrated voice and data services that offer the highest service quality and... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Handover and channel assignment in mobile cellular networks

    Publication Year: 1991, Page(s):42 - 46
    Cited by:  Papers (207)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (493 KB)

    A taxonomy of channel assignment strategies is provided, and the complexity in each cellular component is discussed. Various handover scenarios and the roles of the base station and the mobile switching center are considered. Prioritization schemes are discussed, and the required intelligence distribution among the network components is defined.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The traveler's dream come true (satellite personal communication)

    Publication Year: 1991, Page(s):48 - 51
    Cited by:  Papers (21)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (350 KB)

    An overview is given of the Iridium, satellite-based personal communications system, which will bring cellular telephone service to virtually every point on the globe. Iridium will use low-earth-orbit satellites. Some of the key system-level considerations that have driven the design are highlighted. The services offered by Iridium are described, and some market projections are given.<> View full abstract»

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

    Publication Year: 1991, Page(s):52 - 71
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1173 KB)

    Current demand for and recent developments in wireless communication are described. Funding for wireless worldwide is examined. Tools and techniques used to characterize radio propagation are discussed, and some research results are presented.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Mobile radio: An overview

    Publication Year: 1991, Page(s):72 - 85
    Cited by:  Papers (15)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1380 KB)

    Following a brief prologue and historical overview, such technical issues as the repertoire of systems and services, management of the airwaves, the operating environment, service quality, network issues and cell size, channel coding and modulation, speech coding, diversity, multiplex, and multiple access (FDMA, TDMA, CDMA) are discussed. Also addressed are the potential economic and sociological ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Broadband CDMA for personal communications systems

    Publication Year: 1991, Page(s):86 - 93
    Cited by:  Papers (67)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (859 KB)

    Multipath propagation in a broadband CDMA environment is described. A propagation model for broadband spread-spectrum signals is presented. Experimental results relating to the sharing of the band by fixed service microwave users and mobile personal communications network (PCN) users are discussed. Field tests indicate that PCN systems can provide high-quality communications when sharing the spect... View full abstract»

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

    Publication Year: 1991, Page(s):94 - 99
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (790 KB)

    The impact of past policies and the nature of the existing system is assessed. Present demand and services are discussed. The role of international financing and participation is examined. Barriers to development are identified.<> 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