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IEE Proceedings - Radar, Sonar and Navigation

Issue 6 • Date Dec 2001

 This issue contains several parts.Go to:  Part Supplement 

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Displaying Results 1 - 10 of 10
  • Probabilistic modelling of bistatic Doppler shift

    Publication Year: 2001, Page(s):348 - 352
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (491 KB)

    The bistatic Doppler shift depends irreducibly on target position and velocity. This fact renders intractable an analytical assessment of the radar's global ability to counter stationary clutter. To avoid lengthy simulations, an easily applicable numerical solution for the cumulative distribution function of the Doppler shift is provided corresponding to plausible assumptions concerning the underl... View full abstract»

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  • Random wave methods for the prediction of the RCS of homogeneous chaotic straight ducts

    Publication Year: 2001, Page(s):331 - 337
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (616 KB)

    It is now fairly well established that convergence of shooting-and-bouncing ray methods is not feasible for the determination of the radar cross-section (RCS) of most realistic engine ducts. This is a consequence of classical chaos theory which was not recognised by radar engineers until quite recently (Mackay, 1998). However, at the time no solution to the problem was offered. A random wave metho... View full abstract»

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  • Low-complexity estimator for four-dimensional parameters under a reparameterised distributed source model

    Publication Year: 2001, Page(s):313 - 317
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (362 KB)

    The spatial character of a parametric model of a coherently distributed source signal (DSS) can be determined by four parameters: the two-dimensional direction of arrival (DOA) and the corresponding two-dimensional angular spread, associated with azimuth and elevation, respectively. The authors consider the problem of estimating these four parameters using a uniform circular array. A low-complexit... View full abstract»

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  • Multipath scattering from complex targets

    Publication Year: 2001, Page(s):343 - 347
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (344 KB)

    Identifying interference patterns originating from particular scatterers on complex objects above an electromagnetic smooth surface can be difficult, especially if the scatterers are not dominant. The author shows the existence of an incoherent scattering space where the relative positions of the scatterers in either height or range are irrelevant and where the backscattered power is the result of... View full abstract»

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  • Ambiguities in the harmonic retrieval problem using non-uniform sampling

    Publication Year: 2001, Page(s):325 - 329
    Cited by:  Papers (1)  |  Patents (14)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (455 KB)

    Harmonic retrieval is an important problem in signal processing and has received a lot of attention. However, solutions to the problem are generally based on uniform sampling with a rate equal to or greater than the Nyquist rate, in order to avoid certain overlapping (ambiguities) of the spectrum. An investigation is carried out for the detection and estimation of ambiguities in the harmonic retri... View full abstract»

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  • Parameter estimation for the K-distribution based on [z log(z)]

    Publication Year: 2001, Page(s):309 - 312
    Cited by:  Papers (36)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (328 KB)

    A new method for estimating the order parameter of a K-distribution is presented which exploits the accuracy of log-based estimators while having a computationally efficient functional form which allows rapid calculation. The estimation accuracy of this new estimator is compared with previous estimators using an analysis technique based on asymptotic expansion of the estimator moments. The new est... View full abstract»

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  • Analysis of distortion in the high range resolution profile from a perturbed target

    Publication Year: 2001, Page(s):353 - 362
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (846 KB)

    Experimental results have demonstrated that even when a target possesses very small perturbed rotational motion, its high range resolution (HRR) radar image profile can be severely distorted. A numerical model has been developed and is able to accurately simulate the observed distorting effects. The well known range-Doppler coupling effect offers a partial explanation for the distortion of a targe... View full abstract»

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  • Random wave and Schell model for the mean RCS of bent chaotic ducts with a homogeneous scattered aperture field distribution

    Publication Year: 2001, Page(s):338 - 342
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (437 KB)

    It is shown how a Schell model can be constructed to estimate the mean radar cross-section (RCS) of long bent engine ducts. A consistent random wave model is also provided to determine representative RCS distributions of such ducts. In both cases it is assumed that the duct has an aperture which is approximately normal to the duct axis and a scattered field distribution which is homogeneous across... View full abstract»

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  • Time-delay estimation for sinusoidal signals

    Publication Year: 2001, Page(s):318 - 324
    Cited by:  Papers (16)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (502 KB)

    The problem of estimating the difference in arrival times of a complex sinusoid received at two spatially separated sensors is considered. Given the sinusoidal frequency, a simple delay estimator using the phase difference of the discrete-time Fourier transforms of the received signals is devised. Using the periodogram, the algorithm is extended to estimate the delay when the frequency is unknown.... View full abstract»

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  • New approach for hybrid strip-map/spotlight SAR data focusing

    Publication Year: 2001, Page(s):363 - 372
    Cited by:  Papers (35)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (754 KB)

    A new algorithm is presented for processing SAR data acquired in the hybrid strip-map/spotlight SAR configuration whose acquisition mode allows the generation of microwave images with an azimuth resolution better than that obtained in the strip-map case and with an imaged area larger than that achieved in the spotlight operation. The algorithm extends the focusing capability of conventional strip-... View full abstract»

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Aims & Scope

IEE Proceedings Radar, Sonar and Navigation covers the theory and practice of systems involving the processing of signals for radar, radio location, radio navigation and surveillance purposes.

Full Aims & Scope