A Method of Extracting Ocean Wave Characteristic Parameters Based on Radar Echo Signals

A technology of radar echoes and characteristic parameters, applied in radio wave measurement systems, instruments, etc., can solve the problems of unobtainable wave observation systems, poor inversion accuracy of high-precision ocean wave wave surface parameters, etc., to improve accuracy and avoid inversion process. Effect

Active Publication Date: 2021-04-30
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing conventional wave observation system cannot obtain high-precision ocean wave surface and the parameter inversion accuracy is poor

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  • A Method of Extracting Ocean Wave Characteristic Parameters Based on Radar Echo Signals
  • A Method of Extracting Ocean Wave Characteristic Parameters Based on Radar Echo Signals
  • A Method of Extracting Ocean Wave Characteristic Parameters Based on Radar Echo Signals

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Embodiment Construction

[0062] Such as figure 1 As shown, the method for extracting sea wave characteristic parameters based on radar echo signals disclosed by the present invention comprises the following steps:

[0063] Step 1, preprocessing the received two-way radar echo data to obtain the wave image sequence;

[0064]Step 2: Construct the elevation inversion model based on the wave image sequence based on the principle of interferometric altimetry, and use the relationship between the phase of the target reflected echo signal and the signal transmission distance and the random phase of target scattering to obtain the interferometric phase difference of the radar image sequence, and the interferometric The phase difference is substituted into the altimetry model, and then the phase unwrapping process is performed to obtain the instantaneous wave height of the ocean wave, and the effective wave height information of the ocean wave is obtained by counting the distribution of the local maximum value...

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Abstract

The invention provides a method for extracting sea wave characteristic parameters based on radar echo signals, the steps include: preprocessing the received two-way radar echo data to obtain a sea wave image sequence; constructing an elevation inversion model for the sea wave image sequence, and calculating The interferometric phase difference of the radar image sequence is then processed by phase unwrapping to obtain the instantaneous wave height of the ocean wave, and the effective wave height information of the ocean wave is obtained by counting the distribution of the local maximum value of the two-dimensional wave surface wave height; the instantaneous wave height information of the ocean wave is subjected to three-dimensional Fu According to the dispersion relation of the linear wave theory, the wave frequency direction spectrum, wave spectrum and wave direction distribution function are obtained, so as to obtain the characteristic parameters of the wave. The extraction method can accurately and effectively obtain the characteristic parameter information of sea waves, and provides an effective means and method for obtaining high-precision characteristic parameter information of sea waves.

Description

technical field [0001] The invention relates to a method for processing radar echo signals, in particular to a method for extracting sea wave characteristic parameters based on radar echo signals. Background technique [0002] At present, the use of radar echo signals to obtain ocean wave parameters has been widely used, but conventional wave observation systems have the problems of being unable to obtain high-precision ocean wave surfaces and poor parameter inversion accuracy. Therefore, it is necessary to design an extraction method of sea wave characteristic parameters that can accurately and effectively obtain sea wave characteristic parameter information, and provide effective means and methods for obtaining high-precision sea wave characteristic parameter information. Contents of the invention [0003] The technical problem to be solved by the present invention is that the existing conventional wave observation system cannot obtain high-precision ocean wave surface a...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 陈希李妍毛科峰胡冬李振锋朱科澜武海浪萧中乐
Owner NAT UNIV OF DEFENSE TECH
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