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Communications, Radar and Signal Processing, IEE Proceedings F

Issue 2 • Date April 1988

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Displaying Results 1 - 8 of 8
  • Segmented-image coding: performance comparison with the discrete cosine transform

    Publication Year: 1988, Page(s):121 - 132
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2198 KB)

    An efficient boundary following algorithm for coding segmented images is presented. The segmented images are obtained by a graph theoretic image segmentation algorithm which has the objective of minimising the sum squared error (SSE) of the representation. This is a development of previously reported work. The representation of regions by zero, first and second order two-dimensional polynomials is... View full abstract»

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  • Simulated Viterbi decoding using importance sampling

    Publication Year: 1988, Page(s):133 - 142
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1105 KB)

    The simulation of Viterbi decoding often requires excessive computer time to estimate low bit error probabilities since large sample sizes are needed to produce the rare error events. In this paper, importance sampling for Viterbi decoding is featured as a means of reducing the number of samples required. This reduction is achieved by modifying or `biasing┬┐┬┐ the noise statistics to produce more er... View full abstract»

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  • Detection processes for V32 modems using trellis coding

    Publication Year: 1988, Page(s):143 - 154
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1347 KB)

    A commonly proposed receiver structure for modems using trellis coding uses an adaptive linear equaliser, to remove intersymbol interference resulting from channel distortion, and a Viterbi decoder to decode the equalised signal. Modifications are proposed to a detection process based on nonlinear (or decision feedback) equalisation, and to reduced state maximum likelihood (RSML) detectors, to all... View full abstract»

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  • Modular, offline, full duplex telephone channel simulator for high speed data transceiver evaluation

    Publication Year: 1988, Page(s):155 - 160
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (749 KB)

    The simulator described in the paper enables the offline representation of a full duplex telephone channel for the purposes of evaluating and monitoring the performance of high speed data transceivers. This modular simulator allows the independent introduction of channel distortions, noise, and local and remote echoes. This makes a transceiver specification easier and more accurate, as the behavio... View full abstract»

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  • Study of the statistical performance of the Pisarenko harmonic decomposition method

    Publication Year: 1988, Page(s):161 - 168
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (841 KB)

    A self-contained statistical analysis of the Pisarenko method for estimating sinusoidal frequencies from signal measurements corrupted by white noise is presented. An explicit formula is provided for the asymptotic covariance matrix of the joint estimation errors of the minimum eigenvalue and the minimum eigenfilter coefficients of the data covariance matrix. Our theoretical results extend and rei... View full abstract»

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  • Improved pitch detection algorithm employing temporal structure investigation of the speech waveform

    Publication Year: 1988, Page(s):169 - 174
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (709 KB)

    The paper examines the performance of several versions of the parallel processing method of pitch period estimation of speech, highlighting the limitations of each. An improved algorithm, based on the temporal investigation of the speech waveform, is described and evaluated. It is shown to offer improved performance in both long term pitch period estimation accuracy, and cycle to cycle accuracy. A... View full abstract»

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  • Error probability of offset differential phase shift keying with intersymbol and adjacent channel interference

    Publication Year: 1988, Page(s):175 - 182
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (806 KB)

    We compute the error probability for conventional and for symmetric differential phase shift keying (CDPSK and SDPSK) with differential detection in systems with binary, ternary and quaternary symbols and with two kinds of filters. In the first system the system response is a Butter-worth filter with two, three and four poles, which causes both intersymbol interference (ISI) and noise correlation ... View full abstract»

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  • Class-IV PRS above the Nyquist rate

    Publication Year: 1988, Page(s):183 - 191
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1013 KB)

    An improved efficiency technique for class-IV (modified duobinary) partial-response signalling (PRS) above the Nyquist rate transmission is described. Computer simulations and hardware measurements for a base-band seven-level class-IV PRS system using this technique are shown in good agreement. It is then demonstrated by computer simulations that, with the use of this technique for class-IV 225-QP... View full abstract»

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Aims & Scope

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

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