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Radio and Electronic Engineer

Issue 4 • Date April 1982

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Displaying Results 1 - 9 of 9
  • Letters to the Editor: Electric forces

    Publication Year: 1982, Page(s):159 - 161
    IEEE is not the copyright holder of this material | PDF file iconPDF (486 KB)
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  • One hundred and eighty years of instrument making

    Publication Year: 1982, Page(s):164 - 170
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (3551 KB)

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  • Book review: Optoelectronics

    Publication Year: 1982
    IEEE is not the copyright holder of this material | PDF file iconPDF (157 KB)
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  • Teletext and viewdata for blind people

    Publication Year: 1982, Page(s):171 - 176
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1921 KB)

    The paper describes the initial stages of the development of microprocessor-based equipment to convert pages of teletext and viewdata information into forms suitable for blind users. The paper concentrates on the development of hardware and software to convert the information into Grade I Braille, which is then displayed on a refreshable row of electrically activated pins, arranged in standard Bra... View full abstract»

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  • Book review: Microprocessor Fundamentals

    Publication Year: 1982
    IEEE is not the copyright holder of this material | PDF file iconPDF (143 KB)
    Freely Available from IEEE
  • Coupling between coaxial cables at radio and microwave frequencies

    Publication Year: 1982, Page(s):177 - 180
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (535 KB)

    The work reported here is concerned with measuring and trying to predict coupling between coaxial cables. The surface transfer impedance per unit length, ZT, is the parameter that determines how the signal gets into and out of the coaxial cables: this is measured in the frequency range from 100 kHz to several GHz in some cases. The third circuit, outside the coaxial cables, consists of the outers ... View full abstract»

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  • Design considerations for ruze and rotman lenses

    Publication Year: 1982, Page(s):181 - 187
    Cited by:  Papers (11)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (909 KB)

    Ruze and Rotman lenses are types of parallel-plate lens which can be used to form multiple beams for antenna arrays. An algebraic analysis is used to relate the different orders of phase aberration to the lens contours, and shows that lenses with zero second- and third-order aberrations can be designed. For a given array length and beam scan angle requirement, the analysis determines the minimum l... View full abstract»

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  • Burst-error-correcting array codes

    Publication Year: 1982, Page(s):188 - 192
    Cited by:  Papers (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (717 KB)

    Classes of array codes for correcting bursts of errors, bursts of erasures, and mixed error-and-erasure bursts, are described. A specific example of a burst-error-correcting array code, and its decoder, is given. These codes have relatively high rates, small decoding delay, simple encoding and decoding algorithms, and are capable of high-speed operation. Array codes have a wide range of applicatio... View full abstract»

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  • Some alternative frequency assignment procedures for mobile radio systems

    Publication Year: 1982, Page(s):193 - 197
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (724 KB)

    Channel assignment procedures for mobile radio systems are usually based on the assumption of equal spacing in frequency between all available channels, and it is customary to argue that the growing demands for greater numbers of channels in the limited spectrum available must be met by dividing the present separation interval of 12.5 kHz by two. Such a measure would however demand major changes i... View full abstract»

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