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IEE Colloquium High Resolution Radar and Sonar

11-11 May 1999

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Displaying Results 1 - 10 of 10
  • High Resolution Radar And Sonar

    Publication Year: 1999, Page(s): 0_4
    IEEE is not the copyright holder of this material | PDF file iconPDF (50 KB)
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  • Wideband phased array radar with digital adaptive beamforming

    Publication Year: 1999, Page(s):1/1 - 1/7
    Cited by:  Papers (6)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (538 KB)

    Future defence radar systems, and in particular the ballistic missile defence (BMD) application, demand radar with high resolution in both angle and range. The high resolution angle estimation requires a large antenna aperture of many wavelengths. The high range resolution requires a wideband waveform of several hundreds of MHz. This paper considers architectures and waveforms for wideband phased ... View full abstract»

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  • Reduction of range ambiguities by using irregularly spaced frequencies in a synthetic wideband waveform

    Publication Year: 1999, Page(s):2/1 - 2/6
    Cited by:  Papers (7)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (476 KB)

    This paper briefly reviews techniques for generating and processing high range resolution radar waveforms. Some of the constraints on waveform design are examined and an example is then given of a waveform which has been designed to meet a specific requirement. View full abstract»

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  • High resolution synthetic aperture sonar: trials and results

    Publication Year: 1999, Page(s):3/1 - 3/4
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (364 KB)

    Synthetic aperture techniques have been very successfully applied in aircraft-borne and spaceborne imaging radar systems. Their use in underwater sonar systems has considerable attraction in several applications, but realisation of practical systems has been rather slower than with radar systems. In practice, several of the processing techniques developed for synthetic aperture radar may also be a... View full abstract»

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  • Characteristics and applications of long range ultra high resolution SAR mode

    Publication Year: 1999, Page(s):4/1 - 4/6
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (559 KB)

    An ultra high resolution (UHR) SAR mode has been designed to bring a very high standard surveillance capability to Thomson-CSF Detexis radars. We present the main characteristics of the demonstrator used for the flight campaigns of spring 97&98. More particularly, we describe the main system parameters, the synthetic bandwidth waveform and some interesting features of UHR images. View full abstract»

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  • The calibration and characterisation of high resolution polarimetric SAR target signatures

    Publication Year: 1999, Page(s):5/1 - 5/7
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (465 KB)

    Using conventional calibration methods we have produced a polarimetrically calibrated image set of a number of vehicle types over a range of look angles. One such of these sets has been the subject of preliminary analysis. We have also developed a more robust and efficient calibration technique using a rotating dihedral target. The variation of polarimetric intensity over 360/spl deg/ of aspect an... View full abstract»

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  • High range resolution techniques for ballistic missile targets

    Publication Year: 1999, Page(s):6/1 - 613
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1753 KB)

    Conventional techniques for target discrimination, by high resolution, show severe disadvantages when faced with ballistic missiles. High range resolution (HRR), for example, usually applies to a single, isolated target that moves with almost constant velocity. Ballistic missile targets are often multiple and tend not to move uniformly, so, for these targets, the usual HRR techniques must be adapt... View full abstract»

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  • Resolving ambiguities for short time duration returns

    Publication Year: 1999, Page(s):7/1 - 7/6
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (430 KB)

    In a complex target environment it is assumed that there will be radar returns of short time duration. Conventional methods for resolving the range ambiguities perform poorly because of the nature of these signals. This paper addresses novel schemes to resolve range ambiguities of single short impulsive signals. An effective technique is shown to be multiplexing two or more coded CW waveforms in t... View full abstract»

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  • A novel wideband directional estimator of multiple periodic signals

    Publication Year: 1999, Page(s):8/1 - 8/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (482 KB)

    Detection and classification of periodic signals is important in many application areas such as communication systems, medicine, radar, sonar, speech and the health monitoring of rotating machines. In general, it must be assumed that the profiles of replicated segments of periodic waveforms are unknown a-priori, that several periodic components may be present in the data and also that the sampling... View full abstract»

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  • A space-time estimator for the detection and estimation of multiple sinusoidal signals

    Publication Year: 1999, Page(s):9/1 - 9/6
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (540 KB)

    Detection and estimation of sinusoids is an important task in many applications such as audio analysis, radar and sonar. Most existing estimation techniques use a single discriminant, such as either frequency or direction-of-arrival and are limited by a one-dimensional resolution limit and a one-dimensional improvement in SNR. Instead, we propose a novel space-time estimator for the detection, est... View full abstract»

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