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Rapid two-dimensional CFAR target detection system and detection method

A target detection and detection system technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as coherent radar two-dimensional CFAR real-time problems, and achieve the effect of meeting real-time processing requirements and reducing detection time

Pending Publication Date: 2018-12-28
BEIJING INST OF REMOTE SENSING EQUIP
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Problems solved by technology

[0003] The purpose of the present invention is to design a fast two-dimensional CFAR target detection method to solve the real-time problem of coherent radar two-dimensional CFAR target detection

Method used

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Embodiment Construction

[0020] The technical solutions of the present invention are clearly and completely described below, and obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] The fast two-dimensional CFAR target detection system described in this embodiment includes a coherent accumulation result reading module, a distance dimension CFAR detection module and a velocity dimension CFAR detection module.

[0022] Further, the coherent accumulation result reading module is used to read two-dimensional coherent accumulation results, denoted as A(n,m), where m=1,2,...,M, n=1,2 ,...,N, M, and N represent the number of velocity units (that is, the number of FFT points) and the number of distance dimension points, respectively. ...

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Abstract

The invention discloses a rapid two-dimensional CFAR (Constant False Alarm Rate) target detection system and detection method. The detection system comprises a phase reference accumulation result reading module, a distance dimension CFAR detection module, and a velocity dimension CFAR detection module. The detection method comprises steps that the phase reference accumulation result reading modulereads and records an echo phase accumulation result; the distance dimension CFAR detection module performs CFAR detection at the distance dimension on the phase reference accumulation result; and thevelocity dimension CFAR detection module performs CFAR detection at the velocity dimension through the point of the distance dimension CFAR. According to the rapid two-dimensional CFAR target detection system and detection method, rapid two-dimensional CFAR detection is realized by decomposing the two-dimensional phase reference accumulation result into distance dimension and velocity dimension separately, and performing CFAR detection; and the detection time can be greatly reduced, and the real-time processing demands of radars can be meet through engineering practice verification.

Description

technical field [0001] The invention relates to a two-dimensional CFAR target detection system and a detection method, in particular to a fast two-dimensional CFAR target detection system and a detection method. Background technique [0002] With the popularization of solid-state transmitters and the improvement of signal processor processing capabilities, modern radars generally use coherent accumulation technology to improve the radar signal-to-noise ratio. After completing coherent accumulation through Fast Fourier Transform (FFT), the target range Doppler Two-dimensional accumulation results, the target detection is extended from the traditional distance dimension detection to range and Doppler two-dimensional detection. Using two-dimensional sliding window detection, the calculation amount increases geometrically compared with one-dimensional CFAR detection, and the real-time performance of target detection is difficult to guarantee. Contents of the invention [0003...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 向巍崔剑谢冰熊斌李东野
Owner BEIJING INST OF REMOTE SENSING EQUIP
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