Communications, Radar and Signal Processing, IEE Proceedings F

Issue 4 • July 1986

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Displaying Results 1 - 15 of 15
  • Satellite communications

    Publication Year: 1986, Page(s):317 - 318
    IEEE is not the copyright holder of this material | PDF file iconPDF (393 KB)
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  • Multibeam SS-TDMA design considerations related to the Olympus Specialised Services Payload

    Publication Year: 1986, Page(s):319 - 325
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (891 KB)

    The paper discusses some of the particular design problems associated with a multibeam satellite-switched time-domain multiple-access (SS-TDMA) satellite payload. Contiguous beam coverage and frequency reuse between beams are shown to place some important constraints on the antenna performance. The local oscillator, switch matrix and input/output chain designs are dependent on the interbeam switch... View full abstract»

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  • Development of spacecraft solid-state high-power L-band amplifiers

    Publication Year: 1986, Page(s):326 - 338
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1790 KB)

    A pivotal development in satellite communications has been that of the spacecraft transponder, and the transmit high-power amplifier in particular. The paper examines the successful development of modular solid-state power amplifiers (SSPAs) at L-band offering significant advantages in redundancy and reliability over the travelling-wave-tube amplifier equivalent. View full abstract»

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  • Satellite-borne active phased array techniques for mobile communications

    Publication Year: 1986, Page(s):339 - 344
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (759 KB)

    The paper investigates the design of active phased arrays for communications satellites. In particular, consideration is given to the problems occurring when active arrays are required to produce multiple beams. There is a real need to keep the complexity of the array electronics to a minimum, but this conflicts with the desire to obtain the greatest possible freedom of control of the radiation pa... View full abstract»

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  • Transmit and receive filters for QPSK signals to optimise the performance on linear and hard-limited channels

    Publication Year: 1986, Page(s):345 - 355
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1485 KB)

    Bandlimited offset QPSK systems are analysed and attempts are made to find new combinations of transmit and receive filters which give improved performance trade-offs when compared with recently proposed filters such as quadrature overlapped raised-cosine (QORC) and squared raised-cosine (QOSRC), and superposed quadrature amplitude modulation (SQAM). The filters are based on finite impulse respons... View full abstract»

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  • Baseband switches and transmultiplexers for use in an on-board processing mobile/business satellite system

    Publication Year: 1986, Page(s):356 - 363
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (933 KB)

    The paper reviews the traffic requirements for two specific services which will benefit by the use of on-board processing: (i) business satellites for European coverage and (ii) land mobile satellites for Europe. Although the traffic requirements are very different for the two services, the proposed architectures are similar in comprising a mixture of baseband switches and transmultiplexers. The p... View full abstract»

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  • WARC-ORB(1) and the international regulation of satellite communications

    Publication Year: 1986, Page(s):364 - 369
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (906 KB)

    A World Administrative Radio Conference has been convened by the International Telecommunication Union to resolve major policy issues in the international regulation of the use of the geostationary satellite orbit (GSO) for radio services. The first session, WARC-ORB(1), met in Geneva in August/September 1985. Major changes were agreed for the regulation of the fixed satellite service, the main pu... View full abstract»

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  • Assignment of channels and polarisations in a broadcasting satellite service environment

    Publication Year: 1986, Page(s):370 - 373
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (552 KB)

    In the process of synthesising a satellite communications plan, a large number of possible configurations has to be analysed in a short amount of time. An important part of the process concerns the allocation of channels and polarisations to the various systems. It is, of course, desirable to make these allocations based on the aggregate carrier/interference ratios, but this needs a considerable a... View full abstract»

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  • The C-MAC/packet system for satellite broadcasting

    Publication Year: 1986, Page(s):374 - 383
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1319 KB)

    The European Broadcasting Union (EBU) has recommended the C-MAC/packet system as a European standard for direct broadcast satellite (DBS) TV. The system is based on a time multiplex of compressed analogue vision components and digital sound and data within each line period of the broadcast signal. The paper describes the structure of the signal, outlines the service identification and conditional ... View full abstract»

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  • Digital pseudo-analogue satellite TV transmission system

    Publication Year: 1986, Page(s):384 - 398
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2258 KB)

    With the advent of high-speed digital signal processing circuits, it is now practicable to transmit television signals by satellite using a variety of digitally derived modulation techniques. By using the concept of ES/NO, the ratio of the energy needed to transmit each sample to the noise spectral density, several different signal formats are critically compared in the paper. It is shown that the... View full abstract»

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  • Satellite broadcasting of sound radio

    Publication Year: 1986, Page(s):399 - 405
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1005 KB)

    Direct broadcasting by satellite (DBS) of television signals to the home has received much attention recently; in contrast, less attention has been paid to sound-only (i.e. radio) broadcasting from satellites. The paper reviews the present range of terrestrial sound broadcasting and explores the possible scope and technical feasibility of using satellites. Satellite broadcasting of sound programme... View full abstract»

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  • Inmarsat's second-generation satellites

    Publication Year: 1986, Page(s):406 - 410
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (727 KB)

    Inmarsat is procuring a new generation of maritime communications satellites to replace its present space segment from 1988 onwards. The new satellites are characterised by prudent use of new technology to achieve increased communications capacity and performance. Ambitious yet realistic business planning forms the basis for what has become one of the world's largest spacecraft procurements. View full abstract»

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  • Military aeronautical satellite communications

    Publication Year: 1986, Page(s):411 - 419
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1421 KB)

    The paper describes the development of Europe's first super high frequency (SHF) military aircraft satellite communications (`aerosatcoms¿¿) terminal. This development marks the accelerating international interest in both civil and military aerosatcoms which has been spurred by recent advances in space, microwave, modulation and antenna technologies. The paper examines the impact of these advances... View full abstract»

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  • Review of propagation characteristics and prediction for satellite links at frequencies of 10¿40 GHz

    Publication Year: 1986, Page(s):420 - 428
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1355 KB)

    The paper is intended to provide a short review on earth-space propagation, concentrating on developments dating primarily from about 1982. The review is orientated towards the needs of radio services, specifically the fixed satellite, broadcasting satellite and mobile satellite services, and draws substantially on the work of the International Radio Consultative Committee (CCIR). The prediction m... View full abstract»

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  • Method for prediction of attenuation on earth-space links based on radar measurements of the physical structure of rainfall

    Publication Year: 1986, Page(s):429 - 440
    Cited by:  Papers (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1579 KB)

    A new method for prediction of attenuation on earth-space links is presented, which is more rigorous in relation to modelling the physical characteristics of rainstorms than previously published techniques. It is also more accurate in providing attenuation predictions for the European region than all other published methods. The method has been derived nonempirically, based entirely on the structu... View full abstract»

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