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A method for extracting the maximum value of phased array weather radar

A weather radar, technology for extracting signals, used in climate sustainability, instrumentation, utilization of re-radiation, etc.

Active Publication Date: 2022-05-17
雷象科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for extracting the maximum value of a phased array weather radar signal, which uses the maximum value in the extracted spectrum, and at the same time uses the uniformity of the spatial radial velocity distribution to discriminate whether it is a signal, so as to solve the problem that the spectral shape of the signal is often uncertain In the case of extracting small signals, technical problems such as errors are not easy to occur

Method used

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Embodiment Construction

[0016] The invention adopts the method of extracting the maximum value in the spectrum, and at the same time utilizes the uniformity of spatial radial velocity distribution to discriminate whether it is a signal or not.

[0017] Flow process of the present invention:

[0018] 1. Process

[0019] 1. Fast Fourier transform

[0020] 2. Extract P max (x,y,z)

[0021] 3. Calculate V (x, y, z)

[0022] 4. Calculate DV (x, y, z)

[0023] 5. Determine whether it is a signal.

[0024] The concrete method that above-mentioned flow process of the present invention comprises:

[0025] After completing the fast Fourier transform (FFT) on the phased radar detection signal, we get

[0026] P(I), I=1,2,...128

[0027] Take the maximum value P max , while using P max The position in the spectrum yields the Doppler velocity V.

[0028] After completing the above processing on the signal in the radar detection space, P max (x,y,z) and V(x,y,z). for a P max (x, y, z), you can find a...

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Abstract

The invention discloses a method for extracting the maximum value of a phased array weather radar. The steps are as follows: 1. Fast Fourier transform, 2. Extracting P max (x, y, z), 3. Calculate V (x, y, z), 4. Calculate DV (x, y, z), 4. Determine whether it is a signal. The present invention extracts the maximum value in the spectrum, and at the same time utilizes the uniformity of spatial radial velocity distribution to identify whether it is a signal. When the spectrum shape of the signal is uncertain, errors will not easily occur when extracting small signals.

Description

technical field [0001] The invention relates to a signal processing technology of weather radar. Background technique [0002] After completing the fast Fourier transform (FFT) of the phased radar detection signal, the velocity power density spectrum of the echo signal and the noise of the receiving channel is obtained, and the next work is to extract the signal power from this spectrum. The usual method is to find the position of the signal on the spectrum according to the spectral shape characteristics of the signal, measure the spectral width of the signal, and calculate the signal power according to the spectral width and the signal power spectral density. The spectral shape of the signal is often uncertain, so these methods are prone to errors when extracting small signals. Contents of the invention [0003] The purpose of the present invention is to provide a method for extracting the maximum value of a phased array weather radar signal, which uses the maximum value...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/14G01S13/95G01S13/02
CPCG06F17/142G01S13/02G01S13/95G01S2013/0245Y02A90/10
Inventor 马舒庆罗川吕寺炜
Owner 雷象科技(北京)有限公司