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Track-before-detect 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: 2014-09-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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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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  • Track-before-detect method based on G0 clutter background and constant target amplitude
  • Track-before-detect method based on G0 clutter background and constant target amplitude
  • Track-before-detect method based on G0 clutter background and constant target amplitude

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Embodiment

[0042] Embodiment, a dynamic programming detection-before-tracking method based on G0 clutter background and constant target amplitude, such as figure 1 Shown:

[0043] 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:

[0044] 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 ;

[0045] 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;

[0046] Step 3. Using the shape parameter α and ...

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Abstract

The invention provides a track-before-detect method based on a G0 clutter background and a constant target amplitude. Aimed at a constant-amplitude target, the method builds a model of a clutter background in a G0 distribution. As there is no analytical solution for the measurement value amplitude likelihood ratio, the method uses a weighted sum of gamma functions to approximate to the likelihood ratio, and thus the method is suitable for G0 clutter background and constant target amplitude situations. The method uses the weighted sum of the incomplete gamma functions as the value function. As the weighted sum of the incomplete gamma functions and the likelihood ratio use clutter parameters and target parameters, compared with a dynamic-programming track-before-detect algorithm in the prior art, the method fully utilizes the background and clutter information and better reflects 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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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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