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Method for conducting before-detection tracking on weak and small target in strong-clutter environment based on dynamic planning

A technology of dynamic programming and weak and small targets, which is applied in radio wave measurement systems, measurement devices, radio wave reflection/re-radiation, etc., can solve the problem of signal amplitude information and large amount of calculation, and insufficient use of clutter map prior information, etc. question

Active Publication Date: 2014-10-01
XIDIAN UNIV
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Problems solved by technology

The invention overcomes the disadvantages in the prior art that the prior information of the clutter map is not fully utilized and only the amplitude information of the signal is used and the amount of calculation is large

Method used

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  • Method for conducting before-detection tracking on weak and small target in strong-clutter environment based on dynamic planning
  • Method for conducting before-detection tracking on weak and small target in strong-clutter environment based on dynamic planning
  • Method for conducting before-detection tracking on weak and small target in strong-clutter environment based on dynamic planning

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Embodiment Construction

[0051] The present invention will be further described below in conjunction with accompanying drawing:

[0052] refer to figure 1 , is a flowchart of the tracking-before-detection method for weak and small targets in a strong clutter environment based on dynamic programming in the present invention. The following is an example of a strong clutter environment and weak and small targets. For example, a strong clutter environment refers to an environment with a clutter-to-noise ratio below 15dB, and a target with a signal-to-noise ratio below 5dB. The detection-before-tracking method for weak and small targets based on dynamic programming in a strong clutter environment includes the following steps:

[0053] S1: Preprocessing the echo data received by the radar to obtain the preprocessed range-Doppler two-dimensional image. The specific instructions are as follows:

[0054] In step S1, the process of preprocessing the echo data received by the radar is: performing FFT coherent...

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Abstract

The invention belongs to the technical field of radar weak and small target detection and tracking, and particularly relates to a method for conducting before-detection tracking on a weak and small target in a strong-clutter environment based on dynamic planning. The method for conducting before-detection tracking on the weak and small target in the strong-clutter environment based on dynamic planning includes the first step of preprocessing echo data received by radar to obtain a processed distance-doppler two-dimensional image, and the second step of constructing a complex number likelihood ratio function according to the distance-doppler two-dimensional image, taking the complex number likelihood ratio function as a value function for dynamic planning, and conducting before-detection tracking on the target according to a dynamic planning method so as to obtain the target track.

Description

technical field [0001] The invention belongs to the technical field of radar weak and small target detection and tracking, and in particular relates to a method for tracking weak and small targets before detection in a strong clutter environment based on dynamic programming. The present invention makes full use of the established clutter map information to construct a complex likelihood ratio function as the value function of dynamic programming, which can effectively improve the detection performance and tracking performance of weak and small targets in a strong clutter environment, so that not only the phase of the target signal is used information and greatly reduces the amount of calculation, which provides a guarantee for the practical use of this method in radar systems. Background technique [0002] Detection and tracking are the most basic tasks of radar. With the development and application of stealth technology, the radar cross-sectional area of ​​typical military...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/72
CPCG01S7/414G01S13/72
Inventor 戴奉周刘宏伟安政帅
Owner XIDIAN UNIV
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