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Weak and small target adaptive correlation filtering method and system, and storage medium

A weak and small target, self-adaptive technology, applied in the radio wave measurement system, radio wave reflection/reradiation, complex mathematical operations, etc., can solve the problems of poor filtering accuracy and late confirmation of the target, and achieve high matching and fast speed , the effect of high filtering precision

Pending Publication Date: 2022-03-11
南京天朗防务科技有限公司
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Problems solved by technology

[0003] Purpose of the invention: The purpose of the invention is to provide an adaptive correlation filtering method to solve the problems of late target confirmation and poor filtering accuracy in the process of weak and small target tracking

Method used

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  • Weak and small target adaptive correlation filtering method and system, and storage medium
  • Weak and small target adaptive correlation filtering method and system, and storage medium
  • Weak and small target adaptive correlation filtering method and system, and storage medium

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Embodiment Construction

[0028] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0029] like figure 1 As shown, the adaptive correlation filtering method for weak and small targets includes a track correlator and a track filter. The track correlator obtains the filter innovation covariance information of the filter for correlation quality evaluation, and the track filter obtains the correlation The measurement noise covariance of the measurement point track calculated in the filter is filtered; the adaptive correlator and the adaptive filter are combined through the integrated correlation filtering framework design, and the filtering results are iteratively optimized through the mutual transmission and feedback of information.

[0030] like figure 2 As shown, the steps of track correlator for track correlator are as follows:

[0031] (11) Obtain the angle root mean square error σ of the measurement point trace θ .

[...

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Abstract

The invention discloses a weak and small target adaptive correlation filtering method and system and a storage medium, and the method comprises the steps: firstly obtaining an adaptive measurement noise covariance through calculation according to a measurement point, and further obtaining the information and information covariance of a track filter; screening an optimal measurement point according to the innovation covariance and the innovation of the filter; and finally, updating track information according to the optimal measurement point and the measurement noise covariance matrix, and outputting a filtering result. According to the method, a Kalman filtering process and data association are combined, and closed-loop feedback is added, so that the filtering process and the association process promote each other; meanwhile, the adaptive measurement noise is calculated according to the signal-to-noise ratio of the measurement trace point, the method can effectively adapt to the difference between strong and weak signals, the matching degree of the measurement noise and the measurement trace point is higher, the filtering convergence is fast, and the filtering precision is high.

Description

technical field [0001] The invention relates to an adaptive correlation filtering method, system and storage medium. Background technique [0002] Due to the wide application of radar technology, more and more radars are used to detect low-altitude targets such as birds and drones. Compared with aircraft and other targets, this type of target has a smaller reflection area, poorer waveguide characteristics, and in a low-altitude environment, the ground environment clutter is stronger. This leads to low signal-to-noise ratio of the target, low detection probability, large detection error, and many false detections caused by ground clutter. For radar detection and tracking processing, this kind of target belongs to the detection and tracking of weak and small targets in the clutter environment. This kind of scene has always been a difficult point in data processing. Faced with this scenario, many scholars have proposed detection and confirmation methods for weak targets. At p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02G01S13/66G01S13/88G06F17/16
CPCG01S7/023G01S13/66G01S13/88G06F17/16
Inventor 陈福年王启凡
Owner 南京天朗防务科技有限公司
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