• DocumentCode
    1036106
  • Title

    Mitigation techniques for non-Gaussian sea clutter

  • Author

    Conte, Ernesto ; De Maio, Antonio

  • Author_Institution
    Dipt. di Ingegneria Elettronica e delle Telecomunicazioni, Univ. degli Studi di Napoli "Federico II", Naples, Italy
  • Volume
    29
  • Issue
    2
  • fYear
    2004
  • fDate
    4/1/2004 12:00:00 AM
  • Firstpage
    284
  • Lastpage
    302
  • Abstract
    This paper deals with the problem of coherent radar detection of targets embedded in clutter modeled as a compound-Gaussian process. We first provide a survey on clutter mitigation techniques with a particular emphasis on adaptive detection schemes ensuring the constant false-alarm rate (CFAR) property with respect to all of the clutter parameters. Thus, we propose a novel decision rule based on a recursive covariance estimator, which exploits the persymmetry property of the clutter covariance matrix. Remarkably, the devised receiver is fully CFAR in that its threshold can be set independently of the clutter distribution as well as of its covariance, even if the environment is highly heterogeneous; namely, the disturbance distributional parameters vary from cell to cell. At the analysis stage, we compare the performance of the novel detector with some classical radar receivers such as that of Kelly and the adaptive matched filter both in the presence of simulated as well as on real radar data, which statistical analysis has shown to be compatible with the compound-Gaussian model. The results show that the new receiving structure generally provides higher detection performance than the others and, for a fluctuating target, it uniformly outperforms the counterparts. We also provide a discussion on the CFAR behavior of the analyzed receivers as well as on their computational complexity.
  • Keywords
    Gaussian processes; adaptive filters; computational complexity; covariance analysis; marine radar; radar clutter; radar detection; radar receivers; recursive estimation; recursive filters; CFAR technology; adaptive detection schemes; adaptive detector; adaptive matched filter; clutter covariance matrix; clutter distribution; clutter mitigation techniques; clutter parameters; coherent radar detection; compound-Gaussian model; compound-Gaussian process; computational complexity; constant false-alarm rate; detection performance; disturbance distributional parameters; embedded targets; nonGaussian noise; nonGaussian sea clutter; persymmetry property; radar receivers; recursive covariance estimator; statistical analysis; Analytical models; Clutter; Computational complexity; Covariance matrix; Detectors; Matched filters; Performance analysis; Radar detection; Recursive estimation; Statistical analysis; Adaptive detector; CFAR technologies; non-Gaussian noise; real sea clutter;
  • fLanguage
    English
  • Journal_Title
    Oceanic Engineering, IEEE Journal of
  • Publisher
    ieee
  • ISSN
    0364-9059
  • Type

    jour

  • DOI
    10.1109/JOE.2004.826901
  • Filename
    1315719