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IEE Proceedings - Radar, Sonar and Navigation

Issue 1 • Date Feb 1999

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Displaying Results 1 - 9 of 9
  • Improved particle filter for nonlinear problems

    Publication Year: 1999, Page(s):2 - 7
    Cited by:  Papers (121)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (568 KB)

    The Kalman filter provides an effective solution to the linear Gaussian filtering problem. However where there is nonlinearity, either in the model specification or the observation process, other methods are required. Methods known generically as `particle filters' are considered. These include the condensation algorithm and the Bayesian bootstrap or sampling importance resampling (SIR) filter. Th... View full abstract»

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  • Radar detection in multipath

    Publication Year: 1999, Page(s):45 - 54
    Cited by:  Papers (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (688 KB)

    An analysis of the detection of radar targets in multipath environments is presented. Radar targets often undergo enhancements or fades due to multipath where the direct-path energy combines with a phase-shifted reflection to enhance or reduce the received energy. This phenomenon is a function of frequency. Radars are often designed to avoid the problems of fades by changing frequency or using an ... View full abstract»

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  • Novel method for super-resolution in radar range domain

    Publication Year: 1999, Page(s):40 - 44
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (360 KB)

    A method based on adaptive regularisation for range super-resolution is presented. The method is computationally efficient and has low SNR threshold close to that of the maximum likelihood (ML) method. The method can simultaneously estimate the number and time delays of the overlapping echoes, whereas determining the number of echoes in ML-type algorithms is difficult. Numerical simulation results... View full abstract»

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  • Performance of corrected adaptive monopulse estimation

    Publication Year: 1999, Page(s):17 - 24
    Cited by:  Papers (16)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (692 KB)

    The shape of sum and difference beams can be severely distorted if nulls in jammer directions are formed. In a previous paper a correction formula was developed that can be applied to monopulse estimation with subarray output adaptive arrays as well as to generalised sidelobe canceller (GSLC) configurations. The present paper derives the probability density function for such monopulse estimators w... View full abstract»

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  • Optimal observer trajectory in bearings-only tracking for manoeuvring sources

    Publication Year: 1999, Page(s):31 - 39
    Cited by:  Papers (12)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (784 KB)

    In the bearings-only tracking context, the source state is only partially observed through nonlinear measurements which are the estimated bearings. For a manoeuvring Markovian source, the source trajectory is estimated by means of classical dynamic programming. However, the quality of the estimation is strongly dependent of the observer trajectory, thus mixing estimation and control. But, in this ... View full abstract»

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  • State estimation of short-range target with multisensors

    Publication Year: 1999, Page(s):8 - 16
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (604 KB)

    The optimal estimation method is systematically investigated for estimating the position and velocity vectors of a short-range target in space with a multisensor system TRn (one transmitting sensor and n receiving sensors). First, the relation between the coherent centralised processing (CP) and decentralised processing (DP) is discussed. After showing that the performance of DP and CP ... View full abstract»

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  • One-dimensional fractal model of the sea surface

    Publication Year: 1999, Page(s):55 - 64
    Cited by:  Papers (13)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (940 KB)

    A one-dimensional fractal model of the sea surface based on the band-limited Weierstrass-Mandelbrot fractal functions is proposed. The model accounts for the geometry and time dependence of the sea surface shape and is in agreement with the solution of the sea hydrodynamic differential equations obtained in a linear regime. A statistical analysis electromagnetic field scattered from the fractal su... View full abstract»

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  • Effects of user distribution on CDMA antenna array receivers

    Publication Year: 1999, Page(s):25 - 30
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (572 KB)

    The use of sectorised antenna array receivers for the uplink of cellular code division multiple access systems is discussed. The distribution of users in the sector can seriously alter the sector capacity that can be achieved. The authors consider two algorithms, matched filtering and interference suppression, and their performance for different user distributions. Simulation results are presented... View full abstract»

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  • Sidescan sonar: a directional filter of seabed texture?

    Publication Year: 1999, Page(s):65 - 72
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1044 KB)

    As the exploration of the seafloor is extended ever further, automated classification and interpretation of sonar images are becoming increasingly important. However, many of the image processing techniques employed for these purposes consider the images simply as a collection of textures and neglect the process by which these images are formed. The most important aspect thus neglected is the dire... 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