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Adaptive Antennas, IEE Colloquium on

Date 8 Jun 1990

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  • High resolution sonar DF system

    Publication Year: 1990, Page(s):7/1 - 7/3
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (156 KB)

    The authors present the results of some experiments carried out to implement certain high resolution DF algorithms on a transputer-based sonar system. These experiments were at a reservoir using a 10 element array working at a frequency of 40 kHz. In this paper two main algorithms, the Capon method or the so called maximum likelihood method (MLM) and the multiple signal classification method (MUSI... View full abstract»

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  • Integrated digital adaptive antennas

    Publication Year: 1990, Page(s):6/1 - 6/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (424 KB)

    The authors consider the philosophy behind the design of high performance digital adaptive antenna processors for future communications and radar applications. The advent of digital radio technology will mean that digital beamforming techniques will become more universal, particularly for communication applications. In such systems, the concept of an integrated adaptive antenna will become a reali... View full abstract»

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  • Stabilisation of adaptive array patterns by signal space projection

    Publication Year: 1990, Page(s):5/1 - 5/3
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (220 KB)

    Adaptive array (and sidelobe canceller) patterns are found to fluctuate considerably from one set of data to another, when there are degrees of freedom to spare, unless a very considerable amount of data integration is performed. A highly effective cure for this effect is to determine a basis for the signal space for the system and project the normally obtained optimum weight vector into the signa... View full abstract»

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  • A systolic array processor for MVDR beamforming

    Publication Year: 1990, Page(s):4/1 - 4/2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (132 KB)

    The authors describe a novel systolic array which can efficiently compute the minimum variance distortionless response (MVDR) from an array of antenna receiver elements in a rapidly changing signal environment. The MVDR beamforming problem amounts to minimising, in a least squares sense, the combined output from an antenna array subject to K independent linear equality constraints each of which co... View full abstract»

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  • Adaptive nulling techniques for look-down radar systems

    Publication Year: 1990, Page(s):3/1 - 3/3
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (132 KB)

    Strong clutter has been shown to have a significant effect upon the performance of a conventional adaptive nuller. Two methods for resolving this problem have been presented. The first of these uses digital FIR filtering to remove the clutter return signals prior to adaptive nulling. The second method uses displaced phase centre antenna (DPCA) processing to remove the clutter prior to adaptive nul... View full abstract»

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  • IEE Colloquium on `Adaptive Antennas' (Digest No.098)

    Publication Year: 1990
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (72 KB)

    The following topics were dealt with: adaptive antenna architecture and applications; adaptive nulling techniques; radar systems; systolic array processor; beamforming; array pattern stabilisation; transputer-based sonar DF system View full abstract»

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  • Architecture and applications of high performance adaptive antenna equipment

    Publication Year: 1990, Page(s):1/1 - 1/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (240 KB)

    The author considers a high performance architecture for the Antenna Control Unit part of an adaptive antenna system which has been successfully applied to a number of diverse applications. A brief justification for the architecture along with results and application examples are presented View full abstract»

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  • MESAR adaptive nulling/digital adaptive architectures

    Publication Year: 1990, Page(s):2/1 - 2/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (188 KB)

    MESAR (multifunction electronically scanned adaptive radar) is the UK active phased array demonstrator programme. It employs advanced digital adaptive beamforming and has demonstrated the full potential of adaptive nulling technology. The author describes the MESAR adaptive nulling architecture. The MESAR application is then used to compare two parallel approaches to digital adaptive beamforming. ... View full abstract»

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