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Communications, Radar and Signal Processing, IEE Proceedings F

Issue 4 • Date August 1981

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Displaying Results 1 - 11 of 11
  • Optimum receiver for impulsive atmospheric radio noise

    Publication Year: 1981, Page(s):189 - 192
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (455 KB)

    Optimum detection of binary signals in impulsive, atmospheric radio noise has been considered. It has been show that an optimum, and a locally optimum receiver (weak signal), consist of a nonlinear device followed by a linear filter, the output of which is compared with a fixed threshold for making a decision. The receiver operating characteristics and the performance of a locally optimum receiver... View full abstract»

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  • Correlation of HF interference spectra with range

    Publication Year: 1981, Page(s):193 - 202
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1044 KB)

    The variation of HF interference spectra with distance on the surface of the earth has been studied by computer simulation and a field experiment. A computer model of the earth and the ionosphere over Europe has been constructed with randomly positioned transmitting stations. The received sky-wave-signal spectrum was then monitored as the receiving location was moved by up to 500km. In the field e... View full abstract»

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  • Use and extrapolation of barrage measurements in formulating PCM planning rules

    Publication Year: 1981, Page(s):203 - 210
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (885 KB)

    Planning rules for installing PCM systems on symmetric-pair cable have traditionally been based on cable crosstalk measurements taken on a pair-to-pair basis, and statistical methods have been used to predict the upper points, 99 or 99.9%, of a cumulative probability distribution of total interference power. Recently, more sophisticated measuring equipment has allowed cable measurements to be take... View full abstract»

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  • Mean acquisition time of active-and passive-correlation acquisition systems for spread-spectrum communication systems

    Publication Year: 1981, Page(s):211 - 214
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (441 KB)

    In PN spread-spectrum communication systems, a PN-code generator at the receiver has to track the PN code contained in the received signal. In practical applications, the time necessary for the initial synchronisation (acquisition) of the tracking ioop should be as short as possible. In the paper, formulas are set up for the calculation of the mean acquisition time for two important acquisition pr... View full abstract»

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  • Laser-radar signature-processing system

    Publication Year: 1981, Page(s):215 - 220
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (890 KB)

    The analysis and presentation of ruby-laser-radar signatures in a particular application is examined. A complete system has been developed for this purpose, from acquisition of the return signal to contour presentation of target structures. In this case the target considered is an industrial plume emanating from a coal-fired power station. View full abstract»

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  • Book review: Programs for Digital Signal Processing

    Publication Year: 1981
    IEEE is not the copyright holder of this material | PDF file iconPDF (130 KB)
    Freely Available from IEEE
  • Application of tactical design in construction of codes

    Publication Year: 1981
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (113 KB)

    Powerful connections exist between Steiner systems and error-correcting codes. Some of these relations are investigated with a view to majority-logic decoding of block codes. Later, the concept of Steiner systems is generalised and a few simple construction techniques for such designs are given. These yield a family of majority-logic decodable codes, some of which are also unequal-error-protection... View full abstract»

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  • Further results on predicting the maximum-likelihood performance of an unknown channel

    Publication Year: 1981, Page(s):223 - 224
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (290 KB)

    Simulation results demonstrate the potential of some new distortion measures in assessing the maximum-likelihood performance of an unknown channel at a practical error rate. Comparison is made with distortion measures currently employed in equaliser design. View full abstract»

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  • New digital adaptive-filter implementation using distributed-arithmetic techniques

    Publication Year: 1981, Page(s):225 - 230
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (728 KB)

    In the paper a new technique for the implementation of digital adaptive filters is presented, based on the use of a so-called distributed-arithmetic filter architecture which uses no multipliers in its realisation of the filtering function. Two adaptive algorithms suitable for this type of filter structure are developed and computer simulations show the viability of both approaches. A simplified-h... View full abstract»

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  • Quality of PAL colour television pictures impaired by random noise: stability of subjective assessment

    Publication Year: 1981, Page(s):231 - 236
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (884 KB)

    An investigation has been made of the subjective impairment introduced into PAL colour television by random noise of flat or triangular spectrum. Results are given in terms of a logistic surface model relating mean opinion score to noise power measured separately through luminance- and chrominance-weighting networks. The parameters given by the surface model (embracing all noise spectra) and by a ... View full abstract»

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  • Selecting smoothing pulses for partial-response digital FM

    Publication Year: 1981, Page(s):237 - 244
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (850 KB)

    In recent years, it has been demonstrated that partial-response continuous-phase modulation (sometimes also referred to as partial-response digital FM) is a spectrally efficient constant-envelope digital-modulation method. If maximum-likelihood sequence detection (e.g. the Viterbi detector) is used, these schemes can also be made power efficient. System complexity grows exponentially with the leng... View full abstract»

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Aims & Scope

The latest version of this title is Radar, Sonar & Navigation, IET.

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