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Optimization method for extracting ocean wave parameters from HFSWR

Li Lun Wu Xiong-Bin Xu Xing-An

Optimization method for extracting ocean wave parameters from HFSWR

Li Lun, Wu Xiong-Bin, Xu Xing-An
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  • Received Date:  14 September 2013
  • Accepted Date:  27 October 2013
  • Published Online:  05 February 2014

Optimization method for extracting ocean wave parameters from HFSWR

  • 1. Wuhan Digital Engineering Institute, Wuhan 430074, China;
  • 2. Electronic Information Institute of Wuhan University, Wuhan 430072, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant No. 60571065), and the National High Technology Research and Development Program of China (Grant Nos. 2009AA09A301, 2012AA 091701).

Abstract: The principle of Doppler spectra detected by HFSWR (high-frequency-surface-wave radar) is given by a nonlinear integral equation from which can be extracted ocean wave parameters. By linearization, the equation can be transferred into a first kind of Fredholm integral equation approximately and can be displayed in a quadratic form. Conjunction gradient (CG) method is proposed to solve the optimization problem. Non-negative restriction is introduced to improve the involved CG algorithm and fit to the priori knowledge so that the ocean wave parameter is non-negative. Validity and accuracy of the proposed method are demonstrated by numerical simulation with different noise levels at one site and two sites.

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