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Radio and Electronic Engineer

Issue 6 • June 1978

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Displaying Results 1 - 13 of 13
  • Digital processing of signals in communications

    Publication Year: 1978
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (121 KB)

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  • The role and scope of digital signal processing in communications systems

    Publication Year: 1978, Page(s):266 - 270
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (568 KB)

    Trends in relative costs encourage sophisticated signal processing in order to make fuller use of the capacity of communications channels. This implies features of subtlety, adaptation, transformation and manipulation which are most expediently handled digitally. The variety, diversity and pervasive nature of these techniques in modern communications nets is illustrated, and their impact on overal... View full abstract»

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  • Partial correction of d.p.c.m. video signals using a walsh corrector

    Publication Year: 1978, Page(s):271 - 276
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (866 KB)

    A Walsh corrector is described for Walsh-transformed pictures. It enables all sequency errors > 4% of the sequency range to be corrected, provided that no more than one sequency is in error per block of length N. The penalty for this correction is a bandwidth increase of 100/(N¿1)%. When the Walsh corrector is applied to d.p.c.m. pictures, single sequency errors per block are usually removed w... View full abstract»

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  • Interfacing intraframe d.p.c.m. with conditional replenishment coding for viewphone signals

    Publication Year: 1978, Page(s):277 - 284
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1022 KB)

    Conditional replenishment is a coding technique that is particularly efficient at exploiting the large frame-to-frame redundancies that exist in visual telephone or visual conferencing signals. However such techniques are necessarily complex and their cost of implementation may, in the case of lightly loaded routes, outweigh the saving in transmission capacity. It is therefore possible that on suc... View full abstract»

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  • High-reliability data transmission to mobile vehicles

    Publication Year: 1978, Page(s):285 - 292
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (872 KB)

    The design for an adaptive-rate data transmission system providing very reliable two-way data transmission over a fading mobile channel is outlined and measurements are presented. A single u.h.f. or v.h.f. carrier is required. Operation with practical fading has been tested using a recording of variations in mobile-channel gain in conjunction with a hardware simulation of the system. The tests sho... View full abstract»

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  • Low-pass digital filtering with the host windowing design technique

    Publication Year: 1978, Page(s):293 - 300
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (833 KB)

    This paper gives a detailed description of the host windowing technique of designing low-pass digital filters. The relationship between the quality of the host filter and the resulting low-pass filter is examined both theoretically and in measurement examples. New transfer function symmetry and error bounding results are obtained and experimentally confirmed for variable cut-off filters. It is dem... View full abstract»

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  • Near-maximum-likelihood detection processes for distorted digital signals

    Publication Year: 1978, Page(s):301 - 309
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1037 KB)

    The paper describes six detection processes that are developments of the Viterbi-algorithm detector and are suitable for use in a synchronous serial data-transmission system operating at a transmission rate of up to 20,000 bit/s over a slowly-time-varying channel. The processes are first described and the results of computer simulation tests are then presented, comparing the tolerances of the dete... View full abstract»

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  • A differential codec for monochrome-television signals

    Publication Year: 1978, Page(s):310 - 312
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (313 KB)

    The design of a digital encoder that will be used for connecting conference television signals to an experimental optical fibre is presented. The signal is transmitted as 4-bit words at 11 megasamples per second. The encoding makes use of psychophysical properties of human vision, but is not strongly dependent on picture content. Under normal viewing conditions, the only degradation in the receive... View full abstract»

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  • IERE news and commentary

    Publication Year: 1978, Page(s):315 - 316
    IEEE is not the copyright holder of this material | PDF file iconPDF (327 KB)
    Freely Available from IEEE
  • Book review: The Wave and Ballistic Theories of Light - A Critical Review

    Publication Year: 1978, Page(s): 318
    IEEE is not the copyright holder of this material | PDF file iconPDF (190 KB)
    Freely Available from IEEE
  • Formal academic qualifications

    Publication Year: 1978
    IEEE is not the copyright holder of this material | PDF file iconPDF (159 KB)
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  • Reply: Formal academic qualifications

    Publication Year: 1978
    IEEE is not the copyright holder of this material | PDF file iconPDF (159 KB)
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  • Radio in the Royal Navy

    Publication Year: 1978
    IEEE is not the copyright holder of this material | PDF file iconPDF (159 KB)
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Aims & Scope

Published from 1963 to February 1964 by the British Institution of Radio Engineers and from March 1964 to 1984 by the the Institution of Electronic and Radio Engineers, The Radio and Electronic Engineer published papers describing original research and development in all branches of electronic engineering, as well as critical and interpretive surveys. Short contributions dealing with device technology, circuit techniques and experimental methods were also included.

Full Aims & Scope