Target detection method and device

A target detection and target technology, applied to radio wave measurement systems, instruments, etc., can solve the problems of target detection performance degradation and high false alarm probability, and achieve the effect of improving target detection performance

Active Publication Date: 2016-06-22
BEIJING RUNKE GENERAL TECH
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Problems solved by technology

[0004] The average constant false alarm detection processing for the range unit needs to be based on the premise that the target is in the Gaussian distribution noise background, and the probability density distribution of the target background far away from the clutter area must conform to the Gaussian distribution; howeve

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Embodiment Construction

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0060] figure 2 It is a flow chart of the target detection method provided by the embodiment of the present invention, the method can be applied to radar signal processing equipment, refer to figure 2 , the method can include:

[0061] Step S100, forming a range-Doppler two-dimensional plane;

[0062] The distance from the Doppler two-dimensional plane such as figure 1 as shown, figure 1 In , the subscript N represents the number of range units of each D...

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Abstract

An embodiment of the invention provides a target detection method and device. The method includes the steps of: forming a distance Doppler two-dimensional plane; for each Doppler channel of the distance Doppler two-dimensional plane, determining a detected distance unit; determining initial reference windows of a constant false alarm left window located at the left side of the detected distance unit, and determining initial reference windows of a constant false alarm right window at the right side; determining an amplitude average value of the initial reference windows of the constant false alarm left window, determining an amplitude average value of the initial reference windows of the constant false alarm right window, selecting the larger amplitude average value as a target amplitude average value, and multiplying the target amplitude average value by a set fast multiplying factor, thereby obtaining a judgment threshold value; and if the amplitude value of the detected distance unit is larger than the judgment threshold value, determining that a target exists in the detected distance unit. The target detection method provided by the embodiment of the invention can control the false alarm probability, thereby improving target detection performance.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a target detection method and device. Background technique [0002] When detecting targets through radar, it is necessary to control the false alarm probability at a low level. The false alarm probability means that when the amplitude of the noise signal exceeds the detection threshold, the radar will mistakenly believe that the target is found. This error is called a false alarm. Probability is false alarm probability; in order to realize the control of false alarm probability, there are many processing methods based on radar signals, such as average constant false alarm detection and so on. [0003] Taking pulse Doppler radar as an example, the common target detection method is: after the moving target detection is completed, a range Doppler two-dimensional plane is formed, such as figure 1 As shown, that is, each frame of echo data includes range dimension and...

Claims

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Application Information

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IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 王丽君王伟张学健张长青
Owner BEIJING RUNKE GENERAL TECH
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