Triangular linear frequency modulation continuous signal parameter estimation method based on differential envelope detection

A technology of linear frequency modulation and envelope detection, applied to radio wave measurement systems, instruments, etc., can solve problems such as large amount of calculation
CN109683142AInactive Publication Date: 2019-04-26ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
Publication Date
2019-04-26
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention belongs to the technical field of signal detection and estimation, and discloses a triangular linear frequency modulation continuous signal parameter estimation method based on differential envelope detection. A receiver samples an observed triangular linear frequency modulation continuous wave signal from the radar to obtain a sampling sequence; the receiver carries out differentialoperation, Hilbert transform and low-pass filtering on the sampling sequence to obtain a denoising envelope sequence; the receiver calculates according to the denoising envelope sequence to obtain signal characteristic parameters including a positive modulation frequency, a negative modulation frequency, a frequency modulation signal period, a minimum frequency in a sweep frequency interval and amaximum frequency in the sweep frequency interval. The triangular linear frequency modulation continuous signal parameter estimation method based on differential envelope detection has the advantagesof characteristic extraction and calculation in the time domain and lower time complexity, and can be used for solving the parameter estimation problem of the triangular linear frequency modulation continuous signal; the characteristic parameters of the triangular linear frequency modulation continuous signal can be obtained by utilizing the sequence difference and the envelope detection, and a parameter estimation value is calculated according to the envelope slope and the change time of the envelope slope.
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Description

technical field

[0001] The invention belongs to the technical field of signal detection and estimation, in particular to a method for estimating parameters of triangular linear frequency modulation continuous signals based on differential envelope detection. Background technique

[0002] At present, the existing technologies commonly used in the industry are as follows: continuous wave radar is an important development direction of modern radar, and has the characteristics of low intercept probability compared with pulse radar. For electronic reconnaissance, how to effectively intercept the enemy's continuous wave radar signal and then extract the signal parameters is a problem worth studying. In continuous wave radar, linear frequency modulation continuous wave (Linear Frequency Modulation Continuous Wave, LFMCW) signal is the most widely used, research on how to effectively detect this kind of signal and identify its characteristic parameters has important theoretical rese...

Claims

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