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An integrated method for frame constant false alarm target detection and tracking

A target detection and constant false alarm technology, 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 effect of probability

Active Publication Date: 2016-03-09
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 discontinuity of the target track, which will easily lead to the premature end of the track, so the target tracking distance is short

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  • An integrated method for frame constant false alarm target detection and tracking
  • An integrated method for frame constant false alarm target detection and tracking
  • An integrated method for frame constant false alarm target detection and tracking

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Embodiment Construction

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

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

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

[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 Indicates the state of the target at frame k, F k-1 Represents the state transition matrix of the target in frame k-1, x k-1 Indicates the state of the target in frame k-1, v k-1 Indicates the process noise of the k-1th frame, in this example F k-1 Takes the following form:

[...

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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, and specifically relates to a detection and tracking method for adjusting the false alarm probability of each detection unit in a target prediction wavegate by using target prediction information, which can be used to improve the target detection probability and expand the target tracking distance in the state of radar target tracking . Background technique [0002] A modern radar system usually consists of two major modules, a signal processing module and a 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 operations such as prediction, association, and filtering after obtaining the target’s position, motion parameters, etc., so as to suppress the random error in the radar measurement process and make the estimation of the ta...

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Application Information

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