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Radio and Electronic Engineer

Issue 4 • Date April 1983

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Displaying Results 1 - 7 of 7
  • Space research and engineering

    Publication Year: 1983 , Page(s): 133 - 134
    Click to expandAbstract | PDF file iconPDF (686 KB)  

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  • Improvements to a pulse compression radar matched filter

    Publication Year: 1983 , Page(s): 138 - 140
    Cited by:  Papers (3)
    Click to expandAbstract | PDF file iconPDF (572 KB)  

    A modification to the matched filter is developed that enables a pulse compression radar system with inherently low sidelobes to be achieved. The system is illustrated using a signal with a truncated Gaussian spectrum with TB = 1000 giving sidelobes of ¿46 dB, mis-match loss of 0.002 dB and moderate tolerance to Doppler shift. View full abstract»

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  • Practical equalization and synchronization strategies for use in serial data transmission over h.f. channels

    Publication Year: 1983 , Page(s): 141 - 145
    Cited by:  Papers (1)
    Click to expandAbstract | PDF file iconPDF (874 KB)  

    This paper describes methods for the serial transmission of data which have been developed and subsequently tested in practice during the course of experiments carried out over a 1000 km h.f. radio link. The methods include the use of adaptive equalization to combat the severe effects of channel-induced intersymbol interference and techniques for securing carrier and bit synchronization in the pre... View full abstract»

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  • On screens and layout for instrument circuits

    Publication Year: 1983 , Page(s): 147 - 152
    Click to expandAbstract | PDF file iconPDF (2068 KB)  

    Electronic instruments should be immune to electromagnetic interference (e.m.i.) but must also be easy to use and service; the designer needs to resolve problems of conflicting interest. Several basic approaches to the e.m.i. problem are identified and practical ways of applying them are considered. Also discussed are the usefulness of Superscreened joints and cables, the importance of correct ins... View full abstract»

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  • Segmentation by colour

    Publication Year: 1983 , Page(s): 153 - 156
    Cited by:  Papers (1)
    Click to expandAbstract | PDF file iconPDF (484 KB)  

    Possible uses of colour information in segmenting scenes for industrial scene analysis are outlined. Two algorithms for segmenting images using colour are described and the problems of using the resulting segmentation for interpreting images as three-dimensional scenes are discussed. View full abstract»

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  • Data transmission at 19.2 kbit/s over telephone circuits

    Publication Year: 1983 , Page(s): 157 - 166
    Cited by:  Papers (1)
    Click to expandAbstract | PDF file iconPDF (1448 KB)  

    The paper describes a theoretical study of two different 19200 bit/s q.a.m. data-transmission systems suitable for use over voice-band telephone circuits. One of the systems employs a 64-point q.a.m. signal with an element rate of 3200 bauds, and the other employs a 256-point q.a.m. signal with an element rate of 2400 bauds. A near-maximum-likelihood detection process, derived from a reduced-state... View full abstract»

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  • Continuous connected word recognition using whole word templates

    Publication Year: 1983 , Page(s): 167 - 175
    Cited by:  Papers (12)
    Click to expandAbstract | PDF file iconPDF (1450 KB)  

    Machines that recognize isolated words from a small, predefined vocabulary have been commercially available for many years. The whole word pattern-matching principles used in these machines are described, and it is shown how these principles can be extended to deal with continuously spoken sequences of words. Details are given of the resulting connected word recognition algorithm which has several... View full abstract»

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