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High-frequency ground wave radar wave field forming method based on ratio of first-order peak to second-order peak

A high-frequency ground wave radar and wave field technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as rough algorithms

Active Publication Date: 2018-12-25
WUHAN UNIV
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Problems solved by technology

However, the algorithm is still relatively rough, mainly because the algorithm only obtains the wave height of a single point, but does not form a large-area wave field

Method used

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  • High-frequency ground wave radar wave field forming method based on ratio of first-order peak to second-order peak
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  • High-frequency ground wave radar wave field forming method based on ratio of first-order peak to second-order peak

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Embodiment Construction

[0066] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, not for limit the invention.

[0067] Combine below Figure 1 to Figure 7 Introduce the specific implementation process of the present invention:

[0068] Step 1: dividing the first-order peak area from the echo Doppler spectrum;

[0069] The first-order peak area division method described in step 1 is the difference spectrum method:

[0070] The data obtained by doing two fast Fourier transforms on the radar echo signal is the radar echo Doppler spectrum, defined as p n , where n∈[1,N], N is the number of radar echo Doppler points, and normalization refers to normalizing all radar echo Doppler frequencies...

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Abstract

The invention provides a high-frequency ground wave radar wave field forming method based on a ratio of a first-order peak to a second-order peak. The method comprises the following steps: dividing afirst-order peak area from an echo Doppler spectrum; figuring a power ratio of the first-order peak to the corresponding second-order peak of each distance, and a first-order peak arrival angle; establishing a reference power ratio-wave height model through wave height data of a reference buoy in combination with the power ratio of the position of the reference buoy; correcting the reference powerratio-wave height model of each distance according to an attenuation model to obtain a corrected power ratio-wave height model; substituting the power ratio of each distance into the corrected powerratio-wave height model to obtain the wave height of each distance; and performing interpolation and smoothing on the wave height of each distance to obtain a final wave field. The high-frequency ground wave radar wave field forming method provided by the invention has the advantages of good spatial resolution and high measurement precision; the result of the wave field is more stable.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and in particular relates to a method for forming a wave field of a high-frequency ground wave radar based on a first-order and second-order peak ratio. Background technique [0002] Based on the characteristics of electromagnetic wave diffraction along the sea surface, high-frequency ground wave radar can realize large-area, all-weather, all-weather, high-resolution, and high-reliability ocean state measurement. It is an important part of the ocean stereoscopic observation network. At the same time, in order to reduce the system cost and the dependence of the system on the installation site, a portable high-frequency ground wave radar using a compact monopole cross-loop antenna was developed. The radar uses the MUSIC algorithm to achieve high-precision angle of arrival estimation, which can meet the measurement accuracy of the flow field. At the same time, the extremely compact ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 文必洋田震田应伟
Owner WUHAN UNIV
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