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Autocorrelation function processing method at zero time delay of radar based on damping fitting

An autocorrelation function and autocorrelation technology, applied in the field of information processing, can solve the problem of inaccurate acquisition of zero-delay information, etc., and achieve the effect of improving the signal processing process, reducing operation and maintenance costs, and reducing the number of times radar is used

Active Publication Date: 2021-07-20
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiency of the zero-time-delay autocorrelation function processing method of the incoherent scattering radar in the above-mentioned prior art, and propose a method for processing the autocorrelation function at the zero-time delay of the radar based on damping fitting, to solve the current non-coherent When coherent scatter radar detects the ionosphere, it cannot accurately obtain information at zero time delay

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  • Autocorrelation function processing method at zero time delay of radar based on damping fitting
  • Autocorrelation function processing method at zero time delay of radar based on damping fitting
  • Autocorrelation function processing method at zero time delay of radar based on damping fitting

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[0055] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0056] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0057] Step 1: Calculate the combined measured autocorrelation value:

[0058] Store the original ionospheric scatter echo data collected from the incoherent scatter radar receiver in the form of a file, then select the data in the file, and process the data in an incoherent scatter radar signal to calculate time delay 1 to time delay 8 The combined measured autocorrelation value is used to determine the damping model parameters in the following steps. The specific calculation process is as follows:

[0059] (1.1) Acquire the original echo data D of ionospheric scattering in the incoherent scattering radar receiver;

[0060] (1.2) Utilize the G...

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Abstract

The invention discloses a method for processing the autocorrelation function at the zero-time-delay point of radar based on damping fitting, which mainly solves the problem that the existing incoherent scattering radar cannot accurately obtain the information at the zero-time-delay point when detecting the ionosphere. The implementation plan is: 1) use the algorithm to calculate the combined measured autocorrelation value L; 2) establish the damping function model, and set the value range and search step size of each parameter in the model; 3) obtain the combined fitting according to the damping function model Autocorrelation value S expression, select parameters multiple times within the parameter value range, calculate the corresponding residual error sum of squares by L and S, and compare to obtain the minimum residual error sum of squares; 4) The parameters corresponding to the minimum residual error sum of squares The value determines the final damping function model, so that the zero-time-delay fitted autocorrelation value is calculated. The processing process of the invention is simple and easy to realize, and the data information at the zero time delay is reserved, and the deficiency of the existing non-coherent scattering radar in the processing of the zero time delay autocorrelation function is made up.

Description

technical field [0001] The invention belongs to the technical field of information processing, and in particular relates to an estimation algorithm of an autocorrelation function of an incoherent scattering radar and a damping fitting method, specifically a method for processing an autocorrelation function at zero time delay of a radar based on damping fitting, which can be used to calculate an incoherent Autocorrelation values ​​at zero time delay for scatter radar. Background technique [0002] As an important part of the near-Earth space environment, the ionosphere directly has a huge impact on activities such as weather monitoring, broadcasting, radar positioning, and radio navigation, so the detection of the ionosphere is very important. Common ionospheric detection methods include vertical detection, oblique detection, coherent scatter radar detection and incoherent scatter radar detection. Among them, incoherent scatter radar has become the most powerful method for g...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 李林韩承姣姬红兵臧博朱明哲刘靳
Owner XIDIAN UNIV
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