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Radar, Sonar and Navigation, IEE Proceedings -

Issue 2 • Date Apr 1998

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Displaying Results 1 - 8 of 8
  • Improved azimuthal resolution of forward looking SAR by sophisticated antenna illumination function design

    Publication Year: 1998 , Page(s): 128 - 134
    Cited by:  Papers (22)  |  Patents (5)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (744 KB)  

    In comparison to side looking synthetic aperture radar (SAR), in a forward looking SAR it is much more difficult to achieve high angular resolution. The reason for this resolution problem is that terrain points situated symmetrically about the flight path have the same Doppler history, and the gradient of the Doppler frequency is small in the flight direction. A promising way to improve the resolu... View full abstract»

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  • Intratropospheric range delay for two refractivity models

    Publication Year: 1998 , Page(s): 119 - 122
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (272 KB)  

    Closed form expressions for range delay are derived the dual-quartic refractivity model developed by H. Hopfield in 1969. Graphical results are presented as functions of source-to-target slant range and elevation angle for three typical refractivity profiles. Asymptotic, or transtropospheric values of range delay at 0° and 90° elevation angles, are compared for the dual-quartic and more co... View full abstract»

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  • Modal morphing on meteorological radar data for rainfall pattern analysis

    Publication Year: 1998 , Page(s): 123 - 127
    Cited by:  Papers (3)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (520 KB)  

    The authors present the application of a modal morphing technique to meteorological data obtained from radar. The procedure, based on the recently introduced modal matching method for shape analysis and description, allows efficient exploitation of the information about detected rainfall patterns and their evolution. After some considerations about the use of the modal matching method for meteorol... View full abstract»

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  • Analysis of a frequency estimator for a class of laser signals with time-varying amplitude

    Publication Year: 1998 , Page(s): 109 - 118
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (796 KB)  

    The authors address the problem of estimating a particle's velocity in the vicinity of an aircraft by means of a laser velocimeter. A model for the signal generated by a particle of air passing through a probe volume consisting of equidistant bright and dark fringes is given. From this model, a frequency estimator based on the phase of the correlation sequence of the signal is proposed. A theoreti... View full abstract»

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  • Data compression, data fusion and Kalman filtering in wavelet packet sub-bands of a multisensor tracking system

    Publication Year: 1998 , Page(s): 100 - 108
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (832 KB)  

    In a multisensor target tracking system in which centralised Kalman filtering is employed, the amount of data to be transmitted from the sensors to the central processor demands a huge communication cost. In addition, the amount of data received by the central processor further imposes an enormous computational load on the Kalman filter. The authors propose the use of wavelet packet decomposition ... View full abstract»

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  • Lineshape analysis of breaking-wave Doppler spectra

    Publication Year: 1998 , Page(s): 135 - 139
    Cited by:  Papers (7)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (516 KB)  

    Based on analyses of spectral densities of microwave backscatter from ocean waves, it has previously been observed that the Doppler spectra could be decomposed into different components, with Bragg scatterers represented by Gaussian lineshapes and faster-than-Bragg scatterers represented by Lorentzian and/or Voigtian lineshapes. It has been conjectured that the faster-than-Bragg scatterers are due... View full abstract»

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  • Properties of estimability criteria for target motion analysis

    Publication Year: 1998 , Page(s): 92 - 99
    Cited by:  Papers (6)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (708 KB)  

    A significant amount of study has been devoted to the observability analysis for passive target motion analysis. A unified presentation of observability and estimability is provided. Using a common formalism, explicit results are thus obtained View full abstract»

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  • How narrow is narrowband?

    Publication Year: 1998 , Page(s): 85 - 91
    Cited by:  Papers (33)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (624 KB)  

    The “narrowband” assumption is often made in the analysis of array signal processing algorithms. The author provides a definition for the notion of narrowband, and the derivation of an expression which is useful in determining if a particular scenario qualifies as narrowband. The expression derived correctly predicts where the narrowband assumption fails for some super-resolution algor... 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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