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Electronics & Communication Engineering Journal

Issue 6 • Date Dec. 1991

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Displaying Results 1 - 8 of 8
  • Optical intersatellite links

    Publication Year: 1991, Page(s):280 - 288
    Cited by:  Papers (2)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (891 KB)

    Direct communication links between spacecraft will be an important element in the future space communication infrastructure. Optical intersatellite links (OISLs) offer the major advantages over conventional microwave links of low mass, power consumption, size and real estate, and flight-qualified transceivers are now feasible. There are, however, formidable problems in achieving pointing accuracy ... View full abstract»

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  • A microterminal satellite data communication system

    Publication Year: 1991, Page(s):243 - 251
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1002 KB)

    An experimental microterminal satellite data communication system known as CODE has been developed by the European Space Agency with support from universities, research organisations and industry. The system, which operates at Ka band, consists of a large number of microterminals with 80 cm diameter antennas which can communicate directly in a mesh network at 64 kbit/s. A central hub station is us... View full abstract»

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  • An expert aid to fault diagnosis and trouble-shooting in satellite communications

    Publication Year: 1991, Page(s):252 - 258
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (646 KB)

    Presents the Satellite Communications Network Expert (SaNE), a knowledge-based aid designed to provide engineering support for fault diagnosis. The SaNE is composed of two elements: a satcom network model, which simulates the structure and functionality of a system based loosely upon a large military satcom network, and a diagnostic component, which uses knowledge- and model-based reasoning techni... View full abstract»

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  • Matrix amplifiers for communication satellite applications

    Publication Year: 1991, Page(s):259 - 266
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (529 KB)

    Matrix amplifier architectures are capable of providing channel-to-beam allocation flexibility for the next generation of multibeam satellite applications. The author considers the implementation aspects of such amplifiers. Network configurations which make the architecture possible are presented as well as measured results. Solid-state power amplifier characteristics for satisfactory operation of... View full abstract»

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  • Microsatellites for global electronic mail networks

    Publication Year: 1991, Page(s):267 - 272
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (782 KB)

    Continuing advances in semiconductor memory and microprocessor technology have made possible a class of small, relatively inexpensive, yet electronically sophisticated satellites, referred to as 'microsatellites'. In July 1991, Arianespace launched the fifth microsatellite in the University of Surrey's pioneering 'UoSAT' series. UoSAT-5 carries a store-and-forward communication payload equipped wi... View full abstract»

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  • The SILEX optical interorbit link experiment

    Publication Year: 1991, Page(s):273 - 279
    Cited by:  Papers (7)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1022 KB)

    The European Space Agency (ESA) has instigated an in-orbit demonstration project known as SILEX (semiconductor laser intersatellite link experiment) using a pre-operational link between the French SPOT-4 low earth orbit satellite and the ESA Advanced Relay and Technology Mission Satellite (ARTEMIS). Such an optical communication system brings some new and challenging requirements. In particular, t... View full abstract»

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  • Fully digital M-ary PSK and M-ary QAM demodulators for land mobile satellite communications

    Publication Year: 1991, Page(s):291 - 298
    Cited by:  Papers (3)  |  Patents (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1879 KB)

    A fully digital implementation of digital modems is the preferred option of system designers because high performance can be achieved at reasonable cost. The author explains the beneficial features inherent in fully digital demodulator implementations. Other features which are required for land mobile satellite communication systems are also discussed. Recently reported techniques for the synchron... View full abstract»

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  • Advanced EHF technologies for lightweight augmentation communication satellites

    Publication Year: 1991, Page(s):299 - 307
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (604 KB)

    Small EHF satellites can significantly complement the antijam service provided by basic EHF MILSATCOM space segments. Mobile/survivable launch vehicles with rapid launch preparations can be utilised to deploy responsively these small satellites into high-altitude elliptical or circular orbits. From such orbits, only a few satellites are needed to provide high-duty-cycle coverage of a critical area... View full abstract»

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