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IEE Proceedings - Radar, Sonar and Navigation

Issue 4 • Date Aug 1996

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Displaying Results 1 - 11 of 11
  • HF skywave radar: estimating aircraft heights using super-resolution in range

    Publication Year: 1996, Page(s):281 - 285
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (528 KB)

    Skywave radar is an over-the-horizon (OTH) surveillance system that uses scattering from the ionosphere to `look down' on targets at a shallow angle. A method is presented that enables these radars to estimate the height of an aircraft by distinguishing it from its image in the sea. Although at this stage the target height is graded into one of only three height bands, an analysis of the statistic... View full abstract»

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  • Multifrequency SAR observation of a ship wake

    Publication Year: 1996, Page(s):275 - 280
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1300 KB)

    The authors have developed a computer simulation to model SAR (synthetic aperture radar) images of ship wakes for various configurations. The model accounts for the surface perturbation produced by a moving ship and the influence of the sea background. Electromagnetic scattering from the surface is calculated by using a tilted Bragg theoretical model in which it is assumed that the small Bragg wav... View full abstract»

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  • Synthetic aperture radar imaging from phase-corrupted data

    Publication Year: 1996, Page(s):268 - 274
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1376 KB)

    A new method to accurately reconstruct a synthetic aperture radar complex image starting from raw received data whose phase is affected by propagation in the turbulent atmosphere and/or by motion instability of the platform carrying the antenna is presented. It is based on the inversion of the, nonlinear relationship between the raw data square amplitude distribution and the unknown complex reflec... View full abstract»

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  • Design and demonstration of a real time processor for one-bit coded SAR signals

    Publication Year: 1996, Page(s):261 - 267
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1624 KB)

    Real-time on-board SAR processing represents a useful tool for airborne and spaceborne microwave remote sensing. The authors present the design together with prototype realisation of a real-time processing architecture for one-bit coded SAR signals, with reference to the German airborne experimental-SAR (E-SAR) system. Since the input data of this implementation are binary sequences, it is more co... View full abstract»

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  • Distributed sequential nearest neighbour multitarget tracking algorithm

    Publication Year: 1996, Page(s):255 - 260
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (436 KB)

    An efficient distributed multitarget tracking algorithm is proposed. This distributed tracker consists of two main components: local sensor level trackers and a track fuser. In the track fuser, local tracks from sensors are first transformed to a common co-ordinate system, and synchronised by a linear Kalman filter. A track correlation technique called sequential minimum normalised distance neares... View full abstract»

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  • Dual space optimisation method for extracting the natural frequencies of a radar target

    Publication Year: 1996, Page(s):286 - 288
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (204 KB)

    A dual space optimisation method (DSO) for extracting the natural frequencies of a radar target is presented. The method is based on the dual space optimisation theory. Methods such as the Prony method, the improved Prony method and the E-pulse method appear to be special cases of it. A new algorithm is also derived from the DSO method View full abstract»

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  • Accuracy of an interferometer in noise

    Publication Year: 1996, Page(s):217 - 226
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (984 KB)

    The paper provides expressions for the accuracy of an interferometer when noise is present in the input signals. Performance is defined in terms of the signal-to-noise ratio and the time-bandwidth product. Results are provided for cases of practical interest where the signal-to-noise ratio is poor and the time-bandwidth product is small, For a digitally implemented system the effects of signal win... View full abstract»

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  • Ambiguity function and Cramer-Rao bound in the multisignal case

    Publication Year: 1996, Page(s):227 - 231
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (360 KB)

    The author aims to bridge the gap between the classical theory of signal processing and modern signal processing for multiple signals. The classical ambiguity function of a single signal used in signal detection and estimation has been extended to superimposed multiple signals. It is shown that the geometric curvature of the generalised ambiguity function at its peak determines the Cramer-Rao boun... View full abstract»

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  • Monopulse estimation with subarray-adaptive arrays and arbitrary sum and difference beams

    Publication Year: 1996, Page(s):232 - 238
    Cited by:  Papers (12)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (576 KB)

    The shape of the sum and difference beams can be severely distorted if nulls in jammer directions are formed. The usual monopulse estimation can then show a large bias, especially for mainbeam jammers. The previously developed correction formulas for the monopulse ratio are generalised to antennas with low sidelobe patterns and digital beamforming at subarray outputs. The low sidelobe sum beam is ... View full abstract»

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  • Hybrid clutter-map/L-CFAR procedure for clutter rejection in nonhomogeneous environment

    Publication Year: 1996, Page(s):239 - 245
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (588 KB)

    The author introduces a new CFAR procedure, which relies on a hybrid clutter-map/L-CFAR strategy, aimed at improving the system robustness against possible nonhomogeneities, while preserving target detectability in a homogeneous environment. After presenting the procedure, guidelines for the design of the relevant system subblocks are given, from both quantitative and qualitative points of view. A... View full abstract»

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  • Evaluation of multiple target track initiation techniques in real radar tracking environments

    Publication Year: 1996, Page(s):246 - 254
    Cited by:  Papers (18)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (720 KB)

    The authors analyse the performance of track initiation techniques in a real radar multiple target tracking environment. The track initiation problem is considered as a problem of detection, and the performance is evaluated using the receiver operating characteristics (ROC). Four track initiation techniques, namely the heuristic rule method, the logic-based method, the Hough transform approach and... 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.

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