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Radio and Electronic Engineer

Issue 6 • June 1982

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Displaying Results 1 - 9 of 9
  • Molecular electronics

    Publication Year: 1982, Page(s):259 - 260
    IEEE is not the copyright holder of this material | PDF file iconPDF (1100 KB)
    Freely Available from IEEE
  • A survey of methods for digitally encoding speech signals

    Publication Year: 1982, Page(s):267 - 276
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1477 KB)

    Modern communications systems are increasingly using digital transmission, at various digit rates, for the many advantages thereby obtained. there are many methods that can be used for converting analogue speech signals to digital form. the aim is to produce very good speech quality using simple equipment at a low digit rate, but any application inevitably involves choosing the appropriate comprom... View full abstract»

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  • Multi-transmitter data systemsߞperformance with stationary receivers

    Publication Year: 1982, Page(s):277 - 282
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (965 KB)

    A theory is developed, based on bench measurements with two quasi-synchronous data signals, which predicts the mean bit error rate (b.e.r.) and the mean 64-bit word failure rate experienced at stationary receivers in the overlap area of two quasi-synchronous transmitters. The signals from the transmitters suffer independent Rayleigh fading. The performance with a carrier frequency difference of a ... View full abstract»

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  • Optical fibre transducers

    Publication Year: 1982, Page(s):283 - 290
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1395 KB)

    Light travelling in an optical fibre may be directly modulated by external parameters such as pressure, strain, temperature, etc. Thus the fibre may form the basis of a transducer involving neither moving parts nor electrical connections. Another class of transducers uses the fibre as a means of guiding light from a monitoring point to the measuring point where the light is externally modulated. T... View full abstract»

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  • The impact of radio-data on broadcast receivers

    Publication Year: 1982, Page(s):291 - 296
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1534 KB)

    For some years the BBC and other European broadcasters have been investigating systems for broadcasting radiodata labels from v.h.f. radio-broadcast transmitters. These data signals are primarily intended to aid radio listeners in tuning their receivers to a desired station orprogramme. Other applications, such as the transmission of simple messages, are also envisaged. Although no firm specificat... View full abstract»

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  • Thin-wire antennas in the presence of a perfectly-conducting body of revolution

    Publication Year: 1982, Page(s):297 - 303
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (736 KB)

    A new numerical method for evaluating electromagnetic field, current distribution and input impedance of thin axial antennas in the presence of a perfectly conducting body of revolution is presented. Two particular cases, an axial dipole antenna near a conducting spheroid (prolate and oblate, including sphere) and near a solid truncated cone (including solid cylinder) are analysed. The actual body... View full abstract»

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  • A single-chip non-recursive digital processor

    Publication Year: 1982, Page(s):304 - 308
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (469 KB)

    A single-chip non-recursive digital processor is being made using a 5V ni-m.o.s. custom-l.s.i. approach. The processor will perform all the arithmetic required for a 48- tap non-recursive filter, with up to 30000 samples/s. The coefficient resolution is up to 10 bits. The processor uses a special coefficient coding to minimize the time required to perform the multiplications, and for this reason t... View full abstract»

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  • Economical filters for range sidelobe reduction with combined codes

    Publication Year: 1982, Page(s):309 - 310
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (242 KB)

    It is shown that approximate inverse filters for combined codes can be implemented using far fewer coefficients than required for direct implementation. This enhances the usefulness of recently reported work on the subject View full abstract»

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  • Book review: Antenna Theory and Design

    Publication Year: 1982
    IEEE is not the copyright holder of this material | PDF file iconPDF (139 KB)
    Freely Available from IEEE