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Turbulent current target detection method of wind profiler radar

A technology of wind profile radar and target detection, which is applied in the field of target detection of wind profile radar, and can solve problems such as poor effect, weak echo signal, and clutter interference

Inactive Publication Date: 2012-06-20
中国人民解放军理工大学气象学院
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Problems solved by technology

When the echo signal is relatively strong and the spectral peak envelope is relatively obvious, the detection of the target is relatively easy; but the echo signal of the wind profiler radar is usually relatively weak, and there is often clutter interference, and many clutter can cover up the real the echo
In this case, using the "objective method" for target detection and calculation of moments of each order, the effect is poor

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[0031] According to the first embodiment of the present invention, the power spectrum detected by the wind profiler radar is input into the signal processor, and then pre-processed. Preprocessing preferably mainly includes interpolation processing and moving average processing.

[0032] Interpolation processing is generally zero velocity point interpolation processing. During the zero-speed point interpolation process, when the wind speed is small, the turbulent signal spectrum envelope is near the zero-speed point, or even contains the zero-speed point, which will cause the power spectrum distribution to break at the zero-speed point, so it is preferable The average of the spectral density values ​​of two points around the zero velocity point is used to replace the zero velocity point value for interpolation.

[0033] The main function of moving average processing is to eliminate some "flying point data". In the spectral data, sometimes there are some data points with parti...

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Abstract

The invention relates to a turbulent current target detection method of a wind profiler radar. The method comprises the following steps of inputting a power spectrum of the wind profiler radar; performing pretreatment on the input power spectrum; determining noise level by a segmental averaging method; performing preliminary detection on the power spectrum, wherein the preliminary detection comprises amplitude detection, spectrum width detection and envelope detection; performing classification detection on the power spectrum, wherein the classification detection comprises exploratory excision of a spectral line, classification judgment according to the excision result and spectral peak separation according to categories; performing speed correction on a turbulent current target power spectrum; performing continuous modification on the turbulent current target power spectrum; and performing spectral moment calculation and outputting a result. According to the method disclosed by the invention, the target detection quality of the wind profiler radar can be improved.

Description

technical field [0001] The invention relates to a wind profile radar turbulence target detection method, which is used for the target detection of the wind profile radar. Background technique [0002] Wind profiler radar (wind profiling radar / wind profiler radar) is a new type of wind measuring radar, which can continuously provide the distribution of meteorological elements such as atmospheric horizontal wind field, vertical airflow, and atmospheric refractive index structure constant with altitude for 24 hours. It is an important equipment for high-altitude meteorological detection, an important supplement to the current conventional balloon wind measurement system, and a new means of weather forecasting and meteorological support. [0003] In the echo signal received by the radar, there are not only the target signal, but also various interference signals such as noise and clutter. The target detection of the radar refers to finding the real target under various interfere...

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Application Information

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IPC IPC(8): G01S7/41G01S7/36G01S13/95
CPCY02A90/10
Inventor 胡明宝贺宏兵李妙英张鹏
Owner 中国人民解放军理工大学气象学院
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