Detection and tracking integration method for frame constant false-alarm target

A technology of target detection and constant false alarm, applied in the field of radar, can solve the problems of target track discontinuity, short target tracking distance, track end, etc., to avoid premature end, avoid false track, high detection The effect of probability

Active Publication Date: 2014-05-21
XIDIAN UNIV
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Problems solved by technology

When the signal-to-noise ratio of the target echo is low, the target detection probability is low, which will cause the dis...

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  • Detection and tracking integration method for frame constant false-alarm target
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  • Detection and tracking integration method for frame constant false-alarm target

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Embodiment Construction

[0026] refer to figure 1 , the implementation steps of the present invention are as follows:

[0027] Step 1, initialization parameters: obtain the initial state estimation value of the target track through the target track start algorithm and the initial state estimation covariance matrix P 0 .

[0028] Step 2, set the target state transition equation and radar measurement equation, according to the estimated value of the target state in the k-1th frame Calculate the predicted value of the target state of the kth frame and the predicted value of the target measurement in the kth frame

[0029] 2a) Set the target state transition equation as:

[0030] x k =F k-1 x k-1 +v k-1 ,

[0031] where x k Represents the state of the target in the kth frame, F k-1 Represents the state transition matrix of the target in the k-1th frame, x k-1 Represents the state of the target in the k-1th frame, v k-1 represents the process noise of the k-1th frame, in this example F ...

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Abstract

The invention discloses detection and tracking integration method for a frame constant false-alarm target. Through the method, the problems of low target detection probability and short target tracking distance in the prior art are solved. According to the detection and tracking integration method, the implementation process comprises the following steps of: 1) obtaining an initial state estimation value and an initial state estimation covariance matrix of the target by a track initiation algorithm; 2) determining a target prediction gate of the kth frame according to the target state estimation value of the k-1th frame and the state estimation covariance matrix of the k-1th frame; 3) calculating the false-alarm probability and detection threshold of each detection unit in the target prediction gate of the kth frame; 4) detecting an echo signal in the target prediction gate, and estimating a target parameter as a measurement data set of the kth frame; and 5) performing relevance and filtering on the measurement data set of the kth frame to obtain a target state estimation value and a state estimation covariance matrix of the kth frame. Compared with the conventional detection and tracking method, the detection and tracking integration method has the advantages that the detection probability of the target is improved, and the tracking distance of the target is expanded.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to a detection and tracking method for adjusting the false alarm probability of each detection unit in the target prediction gate by using target prediction information, which can be used to improve the target detection probability and extend the target tracking distance in the radar target tracking state. . Background technique [0002] Modern radar systems usually contain two major modules, namely signal processing module and data processing module. As the first processing, the radar signal processing module sends the detected target information to the radar data processing module for further processing. The radar data processing module performs prediction, correlation, filtering and other operations after obtaining the estimated position and motion parameters of the target, so as to restrain the random errors in the radar measurement process to a certain extent, making the estimat...

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Application Information

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IPC IPC(8): G01S13/66G01S7/41
CPCG01S7/412G01S13/66
Inventor 刘宏伟周生华刘红亮
Owner XIDIAN UNIV
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