A tracking-before-detection method based on g0 clutter background and constant target amplitude

A technology of constant target amplitude and clutter background, applied in radio wave measurement system, radio wave reflection/re-radiation, measurement devices, etc., can solve problems such as inapplicability of constant target amplitude

Active Publication Date: 2016-06-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the method in this literature is only applicable to the case of target Swerling1 fluctuations, not suitable for the case of constant target amplitude

Method used

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  • A tracking-before-detection method based on g0 clutter background and constant target amplitude
  • A tracking-before-detection method based on g0 clutter background and constant target amplitude
  • A tracking-before-detection method based on g0 clutter background and constant target amplitude

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Embodiment

[0041] Embodiment, a dynamic programming detection-before-tracking method based on G0 clutter background and constant target amplitude, such as figure 1 Shown:

[0042] A kind of tracking method before dynamic programming detection that is used for G0 clutter background, it is characterized in that, comprises the following steps:

[0043] Step 1. Initialize system parameters: state transition number q, shape parameter α of G0 clutter, scale parameter β of G0 clutter and target echo amplitude A, number of frames K processed by dynamic programming tracking algorithm before detection, initialization variable k=1 ;

[0044] Step 2. Read the measurement value Z of the echo data of the kth frame from the radar receiver k , is the amplitude value of the echo data of the kth frame in the measurement unit (i, j), N x The total number of cells quantized for the x-axis, N y is the total number of quantization units on the Y axis;

[0045] Step 3. Using the shape parameter α and ...

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Abstract

The present invention provides a tracking-before-detection method based on G0 clutter background and constant target amplitude. For a target with constant amplitude, the clutter background is modeled as a G0 distribution. Since there is no analytical solution for the likelihood ratio of the measured value amplitude, The present invention adopts weighted gamma function and approximates it, so the method is suitable for G0 clutter background and constant target amplitude. The present invention adopts the weighted incomplete gamma function and the value function, because the weighted incomplete gamma function and the magnitude likelihood ratio of the measured value utilize the clutter parameter and the target parameter, so the method is compared with the existing dynamic programming tracking before detection The algorithm makes full use of the background and clutter information, which can better reflect the difference between the target and the clutter.

Description

technical field [0001] The invention relates to radar target detection technology, in particular to the weak target radar detection technology with non-Gaussian clutter background. Background technique [0002] The increasing complexity of radar detection targets and working environment makes radar target detection technology face great challenges. For example, stealth targets and strong clutter backgrounds such as cities and forests greatly shorten the detection distance of radar. As a result, it is difficult for existing radars to effectively detect weak targets in strong clutter. Improving the ability of radar to detect and track weak targets in strong clutter has become an extremely important and severe mission. [0003] The tracking-before-detection algorithm based on dynamic programming is an effective weak target tracking method, which does not perform threshold detection in a single frame, directly uses multi-frame joint processing of radar echo data, and searches a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/66G06F19/00
CPCG01S7/2927G01S7/354G01S13/66
Inventor 孔令讲姜海超刘睿李小龙易伟崔国龙陈建杨晓波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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