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Radio and Electronic Engineer

Issue 11.12 • November-December 1981

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Displaying Results 1 - 15 of 15
  • On becoming old-fashioned

    Publication Year: 1981
    IEEE is not the copyright holder of this material | PDF file iconPDF (121 KB)
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  • James Clerk Maxwell

    Publication Year: 1981
    IEEE is not the copyright holder of this material | PDF file iconPDF (169 KB)
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  • Developments in sector scanning sonar

    Publication Year: 1981, Page(s):522 - 523
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  • The tenth clerk maxwell memorial lecture

    Publication Year: 1981, Page(s):527 - 539
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  • Results from an experimental dual-band search radar

    Publication Year: 1981, Page(s):541 - 552
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1594 KB)

    The performance of surface survillence radars is complicated by temporal changes of propagation loss, sea and rain clutter and target behaviour. This paper presents short and medium-term statistics using a real time pulse-to-pulse digital analyser operated in conjunction with high dynamic range logarithmic receivers fed from an experimental dual antenna coastal radar. Previous performance predicti... View full abstract»

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  • Electric forces

    Publication Year: 1981, Page(s):553 - 560
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (960 KB)

    In place of Coulomb's Law, F = q1q2/4¿¿0r2, the formula F = (q1q2/4¿¿0r2)¿[1+v2/c2] is proposed, where v is the velocity of one charge relative to the other. Using this velocity-dependent force law, it is shown how Ampere's law can be derived; Maxwell's equations can then be obtained, and their limitations can be discussed. The concept of field is shown to be valid only in the limiting case o... View full abstract»

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  • Book review: James Clerk Maxwell. A Biography

    Publication Year: 1981
    IEEE is not the copyright holder of this material | PDF file iconPDF (131 KB)
    Freely Available from IEEE
  • Optimum diversity separation for over-sea line-of-sight radio links

    Publication Year: 1981, Page(s):561 - 570
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1288 KB)

    Given the requirement for a line-of-sight link operating over a sea path and having established the clearance at the horizon over the appropriate range of k-values using standard procedure, a method is derived for determining the optimum spacing for worst case conditions between receiving antennas where dual space diversity is employed to reduce 2-path fading. The means of calculating the minimum ... View full abstract»

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  • Adaptive discrete cosine transformation of pictures using an energy distribution logarithmic model

    Publication Year: 1981, Page(s):571 - 578
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1096 KB)

    Adaptive transform coding using the discrete cosine transform for monochrome pictures is considered. Selecting which coefficients to transmit and with how many bits involves an estimate of each coefficient's energy. Dividing the image of 256 lines, 256 pels/line into blocks of 16 × 16 pels, we consider two estimation methods for the bit allocation process. One method involves the mean energy of e... View full abstract»

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  • A review of automatic gain control theory

    Publication Year: 1981, Page(s):579 - 590
    Cited by:  Papers (17)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1163 KB)

    The paper presents the general theory of automatic gain control (a.g.c). It includes discussions on loop gain, regulation and the relation between loop parameters and output level stability. An equivalent circuit is derived which is used in the study of dynamic behaviour. The work is extended to cover sampled data a.g.c. systems and design guidelines are derived for a variety of situations. View full abstract»

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  • The magnitude of urban and suburban v.h.f. man-made radio noise

    Publication Year: 1981, Page(s):591 - 597
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (896 KB)

    Measurements of the amplitude of the detected envelope of man-made noise have been made at a frequency near 80 MHz, and the results presented in the form of amplitude probability distribution curves. The major contributing sources are the ignition systems of vehicles and measurement locations such as business areas, arterial roads, and suburban areas have been chosen to give a variety of condition... View full abstract»

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  • Telemetric studies of vertebrates

    Publication Year: 1981, Page(s):598 - 600
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  • Waveguides and components for the 80-300 GHz frequency range

    Publication Year: 1981, Page(s):601 - 602
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  • Correction: Integrated optics: a tutorial review

    Publication Year: 1981
    Cited by:  Papers (1)
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  • Corrections: Electric forces

    Publication Year: 1981
    IEEE is not the copyright holder of this material | PDF file iconPDF (81 KB)
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