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Radio and Electronic Engineer

Issue 3 • Date March 1982

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Displaying Results 1 - 7 of 7
  • A strategy for the British electronics industry

    Publication Year: 1982 , Page(s): 103 - 105
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (451 KB)  

    There is general agreement that the electronics industry of this country has lost the impetus, the inspiration, the initiative which it demonstrated in the decades immediately following the War. It is quite clearly not growing at the rate of its competitors around the world, and its share of the market is notably lagging for those products which are elsewhere demonstrating the fastest opportunitie... View full abstract»

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  • Radio and space research at slough 1920¿1981

    Publication Year: 1982 , Page(s): 111 - 121
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (4015 KB)  

    1981 saw the end of 61 years of radio science at Ditton Park, Slough¿apart from routine ionospheric sounding, which started in 1931 and will continue. The Radio Research Station, formally constituted in 1927, was renamed Radio and Space Research Station in 1965 and Appleton Laboratory in 1973. Following the merger with the Rutherford Laboratory in 1979, the Appleton Laboratory's work has been tra... View full abstract»

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  • The design of optimal partial response data transmission filters

    Publication Year: 1982 , Page(s): 122 - 126
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (533 KB)  

    The time response of a Class I partial-response filter to an impulse should be large at two adjacent sample points,impulse should be large at two adjacent sample points, and near-zero at all other sample points, in order to minimize intersymbol interference. This paper gives an analytic design procedure for a realizable filter that meets this requirement in an optimal manner, and also optimizes ot... View full abstract»

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  • Direct broadcast satellite receivers

    Publication Year: 1982 , Page(s): 127 - 133
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (842 KB)  

    Broadcasting of television and radio programmes from satellites to individual receivers is now technically possible. For Europe, allocations of up to five channels in the 12 GHz band to each country have been authorized and several countries plan to implement services in the next few years. The required characteristics of receivers for individual reception such as sensitivity, selectivity, signal ... View full abstract»

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  • A real-time digital frequency transposer for the 100 Hz to 1 25 MHz band

    Publication Year: 1982 , Page(s): 134 - 138
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (575 KB)  

    A real-time digital signal processor is described which, because of its wide band operation, close tolerance bandwidths and linear phase/frequency response, has a wide range of applications. These include general data handling and conditioning, frequency shifting and transposition, pre-processing for spectrum analysers and bandwidth compression. Apart from analogue-digital convenors and preamplifi... View full abstract»

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  • Surface acoustic wave filters for use in mobile radio

    Publication Year: 1982 , Page(s): 139 - 144
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (2384 KB)  

    Surface acoustic wave filters have not, for a number of reasons, become widely used in mobile radio equipment to date. A brief resume of the historical development of receiver architecture is presented and the design of two receiver systems is described in which the properties of surface acoustic wave filters are used to best advantage: a double conversion superheterodyne portable radio telephone ... View full abstract»

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  • Non-linear equalizers having an improved tolerance to noise

    Publication Year: 1982 , Page(s): 145 - 153
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1069 KB)  

    The paper describes a simple development of a conventional non-linear equalizer which involves only changes to the equalization process itself and can, under certain conditions, give a useful improvement in tolerance to additive white Gaussian noise. The technique is particularly effective when binary data-symbols are transmitted and there is severe amplitude distortion in the received signal. The... View full abstract»

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