IEE Proceedings F - Radar and Signal Processing

Issue 6 • Dec. 1993

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Displaying Results 1 - 10 of 10
  • Differential delay-Doppler estimation using second- and higher-order ambiguity functions

    Publication Year: 1993, Page(s):410 - 418
    Cited by:  Papers (10)  |  Patents (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (751 KB)

    Estimation of differential delay-Doppler parameters in passive sonar and radar applications is addressed. Without assuming Gaussianity it is shown that the conventional ambiguity function is asymptotically chi-squared and yields consistent delay-Doppler estimates for narrowband signals observed in uncorrelated sensor noises. Related asymptotic covariance expressions and their computable forms are ... View full abstract»

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  • Orthogonalised frequency domain Volterra model for non-Gaussian inputs

    Publication Year: 1993, Page(s):402 - 409
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (700 KB)

    An orthogonalised Volterra system model, valid for both non-Gaussian and Gaussian inputs, is presented. The approach is based on ordered sets of conditioned orthogonal higher-order input vectors in the frequency domain, and utilises co-ordinate transformation to relate the orthogonal and nonorthogonal system models. The orthogonal model exhibits no interference effects, thus facilitating physical ... View full abstract»

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  • ICA-based technique for radiating sources estimation: application to airport surveillance

    Publication Year: 1993, Page(s):395 - 401
    Cited by:  Papers (20)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (570 KB)

    As aerial traffic becomes greater, it is more difficult to locate and recognise aircraft in the neighbourhood of civil airports. The technique proposed resorts to a particular device, monopulse radar, and to a tool called independent component analysis (ICA) to separate messages falling in the same radar beam. The algorithms used to compute the ICA use fourth-order cumulants of the observed signal... View full abstract»

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  • Distributions of particle displacements via higher-order moment functions

    Publication Year: 1993, Page(s):390 - 394
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (445 KB)

    Discusses phenomena that are moving and developing in time. Indistinguishable particles are displaced independently, with successive displacements possibly correlated. The author estimates the joint probability distribution of those displacements. It is shown how this may be done via estimates of higher-order cumulant densities and spectra. The results simplify for the case that the original place... View full abstract»

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  • Robust estimation of third-order cumulants in applications of higher-order statistics

    Publication Year: 1993, Page(s):380 - 389
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (743 KB)

    A number of robust estimation of location algorithms are employed to estimate the third order cumulants of various lags from simulated signals representing the zero mean triangular, uniform and Gaussian distributions (as examples of symmetric distributions). Similar simulations have been performed on the output of AR, MA and ARMA systems that are being driven with random Gaussian input. Results ap... View full abstract»

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  • Analysis of floating point roundoff errors in the estimation of higher-order statistics

    Publication Year: 1993, Page(s):371 - 379
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (608 KB)

    A floating point roundoff error analysis in the estimation of higher-order statistics, moments or cumulants of real stationary processes from single data records is provided. Closed form expressions or upper bounds are derived for the mean and variance of the quantisation noise introduced in the estimation of the all-zero and all- tau (diagonal slice) moments, power, skewness and kurtosis. Numeric... View full abstract»

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  • Blind beamforming for non-Gaussian signals

    Publication Year: 1993, Page(s):362 - 370
    Cited by:  Papers (792)  |  Patents (11)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (848 KB)

    The paper considers an application of blind identification to beamforming. The key point is to use estimates of directional vectors rather than resort to their hypothesised value. By using estimates of the directional vectors obtained via blind identification, i.e. without knowing the array manifold, beamforming is made robust with respect to array deformations, distortion of the wave front, point... View full abstract»

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  • Blind deconvolution of coloured signals based on higher-order cepstra and data fusion

    Publication Year: 1993, Page(s):356 - 361
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (584 KB)

    A new nonparametric blind deconvolution algorithm for coloured non-Gaussian signals is presented. The goal of blind deconvolution is the reconstruction of the input of an unknown linear time-invariant (LTI) mixed-phase system based only on the system output. The existing deconvolution schemes that require the least amount of knowledge about the input signal and the LTI system were developed for wh... View full abstract»

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  • Single sensor detection and classification of multiple sources by higher-order spectra

    Publication Year: 1993, Page(s):350 - 355
    Cited by:  Papers (5)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (478 KB)

    The authors consider the detection and classification of multiple non-Gaussian linear sources by superposition of their waveforms available from a single sensor whose measurements are possibly corrupted by additive Gaussian noise. It is shown that by using multiple frequency lags of the trispectrum of single sensor measurements, it is possible to form a trispectral matrix C that possesses the same... View full abstract»

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  • Two-channel tests for common non-Gaussian signal detection

    Publication Year: 1993, Page(s):343 - 349
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (603 KB)

    The problem of detecting an unknown, random, stationary, non-Gaussian signal that is common to two spatially separated sensors is considered. The signal is assumed to have a nonvanishing bispectrum. The measurement noise sequences at the two sensors are either mutually independent with arbitrary cumulant spectra, or dependent with vanishing bispectra. Two statistical tests are presented for signal... View full abstract»

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Aims & Scope

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

Full Aims & Scope