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Method and system for fitting instantaneous frequency curve of LFM signal of radar equipment

A technology of instantaneous frequency and curve fitting, applied in radio wave measurement systems, instruments, etc., can solve the problem of low fitting accuracy and achieve the effect of simple implementation and effective method

Inactive Publication Date: 2019-08-30
BEIJING INST OF REMOTE SENSING EQUIP
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  • Abstract
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Problems solved by technology

[0003] The object of the present invention is to provide a kind of radar equipment LFM signal instantaneous frequency curve fitting method, solve the problem that the fitting accuracy of traditional LFM signal instantaneous frequency curve fitting method is not high

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  • Method and system for fitting instantaneous frequency curve of LFM signal of radar equipment

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description and claims, the advantages and features of the present invention will be more clear. It should be noted that all the drawings are in very simplified form and inaccurate scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0029] It should be noted that, in order to clearly illustrate the content of the present invention, the present invention specifically cites multiple embodiments to further explain different implementation modes of the present invention, wherein the multiple embodiments are enumerated rather than exhaustive. In addition, for the sake of brevity of description, the content mentioned in the previous embodiment is often omitted in the latter embodiment, therefore, the content not mentioned in the later embo...

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Abstract

The invention discloses a method and system for fitting an instantaneous frequency curve of an LFM signal of radar equipment, and is realized by a data buffer module, a phase information extraction module and an instantaneous frequency curve fitting module. The data buffer module buffers the discrete data of the LFM signal to form buffered data; the phase information extraction module performs a discrete Hilbert transform on the buffered data, and extracts phase information; and the instantaneous frequency curve fitting module performs polynomial curve fitting on the instantaneous frequency data. The method and system provided by the invention solve the problem that the fitting precision of the conventional method for fitting the instantaneous frequency curve of the LFM signal is not high.

Description

technical field [0001] The invention relates to a method and a system for fitting an instantaneous frequency curve of a radar equipment LFM signal. Background technique [0002] When the radar equipment is working, it is necessary to fit the instantaneous frequency curve of the input linear frequency modulation LFM signal. The traditional LFM signal instantaneous frequency curve fitting method uses a digital oscilloscope to collect and quantify the LFM signal, extracts the frequency information, and uses a point-by-point method to perform curve fitting on the frequency value. This method is simple to implement, but due to the The connection is made in a straight line, and the fitting accuracy is not high. Contents of the invention [0003] The purpose of the present invention is to provide a method for fitting the instantaneous frequency curve of the LFM signal of radar equipment, which solves the problem that the fitting accuracy of the traditional LFM signal instantaneo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 段云鹏
Owner BEIJING INST OF REMOTE SENSING EQUIP
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