CFAR detecting method under inhomogeneous Weibull clutter background

A detection method and clutter background technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as performance degradation of CFAR detection methods

Inactive Publication Date: 2013-07-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, these CFAR detection methods are only suitable for uniform or partially uniform background environments. When the background environment is complex and rapidly changing, the CFAR detection methods currently proposed cannot guarantee that the resolution unit used to estimate the adaptive threshold of the CUT and the CUT have IID characteristics. , leading to a rapid decline in the performance of the CFAR detection method
In summary, most of the CFAR detection methods proposed so far have great limitations in practical applications.

Method used

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  • CFAR detecting method under inhomogeneous Weibull clutter background
  • CFAR detecting method under inhomogeneous Weibull clutter background
  • CFAR detecting method under inhomogeneous Weibull clutter background

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Embodiment Construction

[0023] A specific embodiment of the present invention is given below in conjunction with IPIX radar measured data.

[0024] The IPIX radar measured data is the measured echo data of the IPIX radar of McMaster University in Canada. The radar is located on a cliff facing the Atlantic Ocean, with coordinates of 44°36.72′N, 63°25.41′W, 100 feet above sea level. The selected The data contains 1900×160 data points. The selected radar is located at Figure 5 (a) At the intersection of thick black lines, the area surrounded by thick black lines is the detection area. Such as Figure 5 (b) is the clutter amplitude map of the radar irradiation area in the Cartesian coordinate system.

[0025] S1. Perform logarithmic processing on the echo data plane, and perform sliding window processing along the distance direction with a reference window whose length is N=32, and perform clutter edge detection on each sliding window. The detection process is:

[0026] S11. Initialize the resolutio...

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Abstract

The invention relates to a CFAR detecting method under an inhomogeneous Weibull clutter background. The CFAR detecting method is characterized in that the method is a uniform reference unit selecting method based on an M-N clutter edge binary accumulation detecting method, data obtained through the M-N clutter edge binary accumulation detecting method are classified and numbered according to scale parameters and shape parameters, and after the data are numbered, a distinguishing unit which is equal to a CUT serial number is selected as a reference window to conduct CFAR detection.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and relates to a radar adaptive detection technology, in particular to an adaptive constant false alarm (CFAR) detection method. Background technique [0002] Since CFAR detection can maintain the probability of radar false alarm basically unchanged in the changing clutter environment, it is widely used in radar target detection under strong clutter background. In CFAR inspection, the unit to be detected (CUT) is compared with an adaptive threshold. The adaptive threshold is estimated by using the resolution unit data around the CUT as a reference unit. The data of the reference unit and the CUT satisfy independent and identical distribution (IID) . However, many radar irradiated areas contain many different types of landforms (such as urban areas and coasts, etc.), resulting in non-uniform radar clutter. These non-uniform clutters cause the reference unit data to be different from the CU...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
Inventor 孔令讲彭馨仪张天贤易伟
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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