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Weak target detection and tracking method

A weak target detection and target technology, applied in measurement devices, radio wave measurement systems, radio wave reflection/re-radiation and other directions, can solve the problem of not considering weight, energy diffusion, and not limiting the scope of energy accumulation.

Active Publication Date: 2020-04-10
HOHAI UNIV
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Problems solved by technology

[0004] Although the tracking-before-detection algorithm based on dynamic programming can greatly reduce the amount of calculation compared with the exhaustive method, since the traditional dynamic programming algorithm neither limits the range of energy accumulation nor considers the weight, this method will have serious energy problems. Diffusion problem, which leads to more false tracks

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Embodiment Construction

[0072] The present invention will be further described below. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0073] A weak target detection and tracking method, comprising the steps of:

[0074] (1) The echo signal contains N 2 resolution units, record the measurement value of each resolution unit as z ij (k), the measured values ​​of all resolution units at time k form a matrix, which is recorded as:

[0075] Z(k)={z ij (k)} (1)

[0076] Among them, 0≤i, j≤N, z ij (k) is the measured value in the resolution unit (i, j), which can be expressed as:

[0077]

[0078] Among them, s ij (k) represents the target echo signal, n ij (k) represents a random noise signal. Here it is assumed that the noise signal obeys the standard normal distribution, and for different time k, the random noise signal n ij (k) Independent and identically distrib...

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Abstract

The invention discloses a weak target detection and tracking method. According to the weak target detection and tracking method based on weighted dynamic programming and Kalman filtering, multi-framedata obtained by a sensor is used for energy accumulation by using a dynamic programming algorithm, and a path with the maximum energy is selected as a predicted flight path, so that the problem of huge calculated amount caused by an exhaustion method is solved. When energy accumulation is carried out, a weighting function is adopted to carry out weighting processing, and a predicted value given by Kalman filtering is combined to determine the zero point position of the weighting function. By adopting the weighting function and the dynamic planning algorithm after Kalman filtering processing,the problem of energy diffusion in the traditional dynamic planning algorithm can be effectively solved, so that the accuracy of flight path establishment is improved.

Description

technical field [0001] The invention relates to a weak target detection and tracking method, belonging to the technical field of target detection and target tracking. Background technique [0002] The tracking-before-detection algorithm is mainly an algorithm proposed to solve the detection and tracking of weak targets in the background of clutter. The algorithm uses multiple scans of the sensor to obtain data containing noise and targets, and jointly processes them to make full use of multiple sets of data, thereby realizing the detection and tracking of weak targets. In order to realize the track-before-detection algorithm, many methods have been proposed, such as track-before-detection algorithm based on particle filter, track-before-detect algorithm based on dynamic programming, track-before-detect algorithm based on Hough transform, etc. [0003] The tracking-before-detection algorithm based on dynamic programming is an optimization algorithm of the exhaustive method, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G01S13/00G01S13/66
CPCG01S7/418G01S7/415G01S7/414G01S13/006G01S13/66
Inventor 胡居荣祝怡翔周寒瑜陆龙
Owner HOHAI UNIV