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Proceedings of the IEEE

Issue 11 • Nov. 1984

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Displaying Results 1 - 25 of 32
  • [Front cover and table of contents]

    Publication Year: 1984, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1984, Page(s):1427 - 1428
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    Freely Available from IEEE
  • Syncom and its successors

    Publication Year: 1984, Page(s):1429 - 1434
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7974 KB)

    Twenty years ago, Syncom III transmitted the Tokyo Olympics to the United States. It was the first transoceanic television transmission for a sustained period of time. The success of Syncom led to the development of satellite systems for both international and domestic applications. The competition that ensued among domestic satellite systems has resulted in a number of innovative services, which ... View full abstract»

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  • Satellite locations—1984

    Publication Year: 1984, Page(s):1434 - 1444
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    In a brief 20 years the number of satellites in the geosynchronous and geostationary orbits have increased by enormous bounds. Far more than Arthur C. Clarke, himself, could have anticipated two decades ago. This paper lists those satellites in geographical order, starting with the longitude of Greenwich and proceeding eastward, and the second table starting at Greenwich and going westward. The po... View full abstract»

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  • Satellite telenets: A techno-economic assessment of major trends for the future

    Publication Year: 1984, Page(s):1445 - 1456
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1199 KB)

    This paper reviews the historical trends in the development of new communications satellite technology and the technical and economic forces that will drive a new revolution in wide-band communications services in the 1980s and 1990s. The following key technical and service aspects of the new satellite telenets of the 1980s and 1990s will be addressed: new digital services, new antenna designs, in... View full abstract»

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  • INTELSAT VI—A continuing evolution

    Publication Year: 1984, Page(s):1457 - 1468
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1165 KB)

    In early 1982, the International Telecommunications Satellite Organization (INTELSAT) awarded a contract to the Hughes Aircraft Company for a new generation of communications satellites. The INTELSAT VI satellites are the largest, most sophisticated commercial communications satellites ever built. Their major technological challenges include a six-fold reuse of the 6/4-GHz frequency spectrum and t... View full abstract»

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  • Digital satellite networks in Europe

    Publication Year: 1984, Page(s):1469 - 1482
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1301 KB)

    Developments of digital satellite networks are progressing in Europe at international as well as national levels. EUTELSAT and its signatories are actively setting up two regional networks based on the ECS satellites built by ESA. One will carry large bundles of telephone circuits between national gateways; the other will provide special services to corporate organizations and businesses. On the o... View full abstract»

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  • RCA satellite networks: High technology and low user cost

    Publication Year: 1984, Page(s):1483 - 1505
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    Channel demands on the RCA Americom domestic satellite communications system have continued to increase rapidly since the first launch in 1975. After deploying four of the first-generation 24-channel spacecraft, Americom introduced an advanced, all-solid-state design in 1982 which has more than twice the traffic capacity of the original series. To supplement the operational network of six C-band s... View full abstract»

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  • Satellite communications networks

    Publication Year: 1984, Page(s):1506 - 1519
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1167 KB)

    The evolution of satellite communication systems over the past two decades from simple point-to-point links with unique subcarrier-defined paths between points to today's multipoint, satellite-switched, multi-satellite networks tying together hundreds of earth stations, and transmitting voice and data increasingly in the time domain is considered. Examples of the methods used to manage network res... View full abstract»

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  • The emergence of satellite systems for rural communications

    Publication Year: 1984, Page(s):1520 - 1525
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (410 KB)

    Technology improvements in recent years are leading toward low-cost satellite communications systems that can be applied to rural telephony solutions worldwide. This paper will review some of the key technology and economic developments that are taking place today and further developments projected for the near future that can make this prospect a reality. Advances in signal processing and error-c... View full abstract»

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  • Micro earth stations as personal computer accessories

    Publication Year: 1984, Page(s):1526 - 1531
    Cited by:  Papers (18)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (625 KB)

    Equatorial Communications Company has shipped more than 15000 micro earth stations, typically 24 in (60 cm) in diameter and costing under $3000 for reception of satellite data transmission. Many are used as data input devices for personal computers in distributed database applications. Equatorial is also developing low-cost interactive micro earth stations appropriate for connecting personal compu... View full abstract»

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  • PACKSATNET—An alternative to data networks

    Publication Year: 1984, Page(s):1532 - 1536
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    This paper contains a presentation of PACKSATNET, the demonstration data network of Indonesia based on the PALAPA satellite [1] that uses only radio links from the user's premises. PACKSATNET is scheduled to go into operation before the end of 1984, so it is already possible to draw some conclusions about its development phase and to point out its possible expansion into a public data network, tak... View full abstract»

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  • Improvements in capacity of analog voice multiplex systems carried by satellite

    Publication Year: 1984, Page(s):1537 - 1547
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1096 KB)

    Significant improvements in the voice capacities of satellite transponders have been made in the last few years. A major emphasis has been in improving the voice channel capacities of TDMA using techniques such as ADPCM and DSI. In domestic satellite systems, however, analog transmission of speech signals continues to be used heavily. This paper describes how the capacity of analog FDM-based syste... View full abstract»

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  • Analytical comparisons of CSSB and TDMA/DSI satellite transmission and techniques

    Publication Year: 1984, Page(s):1548 - 1555
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (591 KB)

    At the same time that Time-Division Multiple Access (TDMA) with Digital Speech Interpolation (DSI) is gaining wide acceptance, being planned for almost every modern satellite communication network as the basic transmission technique, a variation of the classical single sideband using companders (CSSB) has recently been proposed, accompanied by the claim of higher transponder capacities. The higher... View full abstract»

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  • Cost-effective networking via digital satellite communications

    Publication Year: 1984, Page(s):1556 - 1563
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    This paper presents the major issues in forming a cost-effective and efficient network from a set of earth stations sharing the satellite resource. The discussion is in the context of satisfying the performance requirements for transmission of data, voice, and image presented to earth stations in digital form. Multiple access techniques have significant impacts on the network economy. Although wid... View full abstract»

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  • Efficient space segment utilization in satellite data networks

    Publication Year: 1984, Page(s):1564 - 1572
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (753 KB)

    A generalized approach to the efficient utilization of the space segment in multicarrier per transponder applications is presented. Based on the concept of normalized satellite link densities, the conditions required to fully utilize the available transponder resources (power and bandwidth) are derived. These conditions are applied to the design of satellite data networks comprising a large number... View full abstract»

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  • Multiple-access protocols for satellite packet communication networks: A performance comparison

    Publication Year: 1984, Page(s):1573 - 1582
    Cited by:  Papers (31)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (802 KB)

    This paper considers satellite packet communication networks with a large population of bursty users and presents an analytic comparison of the throughput versus average message delay trade-off characteristics of multiple-access protocols. The following six multiple-access protocols are examined: 1) slotted ALOHA, 2) reservation-ALOHA, 3) a reservation protocol with a slotted ALOHA reservation cha... View full abstract»

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  • Performance of uplink random-access and downlink TDMA techniques for packet satellite networks

    Publication Year: 1984, Page(s):1583 - 1593
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (805 KB)

    In this paper the integration of ALOHA random-access schemes and TDMA techniques in a multibeam packet satellite network are analyzed. The uplink channels operate according to a slotted-ALOHA protocol, while the downlink channels use a TDMA strategy. Two different models are described. In the first model, each transponder on-board the satellite is permanently connected to a preassigned spot beam. ... View full abstract»

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  • SBS TDMA-DA system with VAC and DAC

    Publication Year: 1984, Page(s):1594 - 1610
    Cited by:  Papers (6)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1282 KB)

    This paper describes many of the design considerations involved in developlng the demand assignment (DA) subsystem of the TDMA satellite communication system for Satellite Business Systems. Each earth station has a satellite communications controller (SCC) which requests capacity to meet current voice and data traffic demands. A central reference station frequently reallocates capacity based on th... View full abstract»

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  • An integrated voice and data multiple-access scheme for a land-mobile satellite system

    Publication Year: 1984, Page(s):1611 - 1619
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (653 KB)

    A Land-Mobile Satellite System (LMSS) is a satellite-based communications network which provides voice and data communications to mobile users in a vast geographical area. By placing a "relay tower" at a height of 22300 mi, an LMSS can provide ubiquitous radio communication to vehicles roaming in remote or thinly populated area. LMSS is capable of supporting a variety of services, such as two-way ... View full abstract»

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  • A digital transmission system for global maritime satellite communications

    Publication Year: 1984, Page(s):1620 - 1626
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (772 KB)

    A digital transmission system for global maritime satellite communications has been designed, and experimental communications equipment has been developed, taking account of its potential application to the INMARSAT system where analog modulation is currently used for telephone signal transmission. This paper discusses possible digital technologies to realize an efficient digital transmission syst... View full abstract»

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  • Packet switching for mobile earth stations via low-orbit satellite network

    Publication Year: 1984, Page(s):1627 - 1636
    Cited by:  Papers (10)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (994 KB)

    A potentially valuable implementation of a satellite computer communication packet switched network is one which is survivable and distributed. That is, a system which dynamically adapts to changing network element connectivities, changing interconnections of users, and is not dependent on any central unit for its own internal command and control. A laboratory prototype of such a system has been c... View full abstract»

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  • 30/20-GHz domestic satellite communication system in the public communication network of Japan: Design and operation

    Publication Year: 1984, Page(s):1637 - 1644
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (984 KB)

    Nippon Telegraph and Telephone Public Corporation (NTT) initiated the world's first 30/20-GHz domestic satellite communication system for commercial use, using CS-2s launched from Japan in 1983. This system utilizes TDMA digital communication in the trunk transmission route of the public communication network, which includes interregional-center routes and main-island-to-remoteisland routes. Small... View full abstract»

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  • Complex eigenfrequencies of axisymmetric objects: Physical interpretation in terms of resonances

    Publication Year: 1984, Page(s):1652 - 1653
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (227 KB)

    We calculate and compile complex eigenfrequencies of spheroids and finite-length cylinders for electromagnetic and acoustic vibrations. This includes eigenvibrations of nonlongitudinal type, studied by us earlier for the first time. We provide a physical explanation for these in terms of the resonances caused by the phase matching of helical surface waves on the object. View full abstract»

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  • Minimum p-error design of nonuniformly spaced linear array

    Publication Year: 1984, Page(s):1654 - 1655
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (175 KB)

    A design method which minimizes the p-error of a weighted array pattern for nonuniform linear array is studied. The Fletcher-Powell method is used to find the minimum set of sensor locations. With uniform weight and large p, the result has sidelobes of almost equal level. In addition, an array pattern with null(s) at some specified value can be designed with proper choices of weights. View full abstract»

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North Carolina State University