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Radio and Electronic Engineer

Issue 5 • Date May 1983

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Displaying Results 1 - 7 of 7
  • On technological change

    Publication Year: 1983, Page(s):177 - 178
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (304 KB)

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  • Practical results from the performance evaluation of an 11 Ghz 140 Mbit/s digital radio relay system

    Publication Year: 1983, Page(s):181 - 189
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1393 KB)

    This paper describes the results and conclusions from a two-year field evaluation programme of 11 GHz 140 Mbit/s q.p.s.k. digital radio relay equipment conducted on three hops in the UK by British Telecom. In the first part of the paper the general features of system performance are described, including month-by-month outage results, error distributions, outage event durations, and error-free-seco... View full abstract»

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  • The implementation of an information retrieval service for component data

    Publication Year: 1983, Page(s):190 - 194
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (793 KB)

    The paper provides the background which caused the UK Ministry of Defence to introduce an information retrieval service based on information technology techniques. The decision process leading to a system specification is outlined and the specification arrived at detailed. The method adopted to procure the system is described followed by details of the systems performance after installation. Final... View full abstract»

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  • A microprogrammed adaptive filter implementation

    Publication Year: 1983, Page(s):195 - 198
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (616 KB)

    A high-speed, microprogrammed adaptive filter implementation using the AM2900 bit-slice devices and a hardware multiplier-accumulator is described. The implementation is based upon a clipped least-mean-square adaptation algorithm. The structure of the filter and its performance are presented. View full abstract»

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  • Group delay transfer functions with least squares error

    Publication Year: 1983, Page(s):199 - 208
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1289 KB)

    This paper presents tables of group-delay functions, ranging in order from 3 to 11, which approximate a nominal one second delay over bandwidths up to 17.5 rad/s. The functions, which can be arranged in all-pole or non-minimum phase forms, are based on a least-squares minimization of the delay error and therefore exhibit `unequal ripple¿ characteristics. These and other features of the leastmean-... View full abstract»

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  • The application of a life cycle cost model to modular electronic systems

    Publication Year: 1983, Page(s):209 - 215
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (993 KB)

    The widespread use of modular construction in the electronic equipment industry has resulted in the development of standard electronic modules (SEMs). These units are an extension of the original modular partitioning concept, and are designed for universal use, being interchangeable between different items of SEM equipment. They are highly reliable functional modules which may be discarded on fail... View full abstract»

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  • Recording digital video component signals on a disc-drive to generate animated sequences for television

    Publication Year: 1983, Page(s):216 - 220
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (689 KB)

    This paper describes the recording and replaying of digital video signals using a computer-type disc-drive as part of a system being developed to enable animated picture sequences to be generated for television, where at present film is used. The characteristics of the disc-drive are described together with data processing, error protection and signal synchronization systems which enable digital t... View full abstract»

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