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Improved CFAR detection method based on inter-circle abnormal unit identification

A detection method, CA-CFAR technology, applied to radio wave measurement systems, complex mathematical operations, instruments, etc., can solve undiscovered problems, achieve high flexibility, suppress false alarm problems, and solve shadowing problems

Pending Publication Date: 2022-04-19
CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] According to the existing data, an improved CFAR method based on the removal of abnormal units between circles proposed in the present invention has not been found

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  • Improved CFAR detection method based on inter-circle abnormal unit identification
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  • Improved CFAR detection method based on inter-circle abnormal unit identification

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Embodiment Construction

[0044] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0045] figure 1 It is a flow chart of the improved CFAR detection method based on inter-circle abnormal unit identification of the present invention; figure 2 It is the radar signal processing and detection flowchart of the present invention; image 3 It is a flow chart for abnormal unit identification of the present invention; Figure 4 It is a flow chart of abnormal unit elimination and target output in the present invention.

[0046] The improved CFAR detection method based on inter-circle abnormal unit identification of the present invention comprises the following steps:

[0047] 1) Radar signal processing and detection: When the shore-based radar detects the sea, it uses a circular scanning method for detection. Each circle is composed of several wave positions, and each wave position sends several pulses. After obtaining the sampli...

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Abstract

The invention relates to an improved CFAR detection method based on inter-circle abnormal unit identification. The method comprises the following steps: 1) radar signal processing and detection; 2) abnormal unit identification; and 3) abnormal unit elimination and target output. Compared with the prior art, the sea surface weak target detection method has the remarkable advantages that the false alarm problem caused by the sea peak can be effectively inhibited, the problem that the sea surface weak target is shielded by the sea peak is solved, and convenience is provided for sea surface weak target detection. According to the method, only the signal processing flow is optimized, additional hardware is not needed, and the flexibility is high. The CFAR detection method based on inter-circle abnormal unit identification is suitable for a shore-based to-sea alert radar.

Description

technical field [0001] The invention relates to a radar sea target detection method, in particular to an improved CFAR detection method based on abnormal unit identification between circles. Background technique [0002] In the detection of sea targets by radar, it is easily affected by complex sea conditions. In medium and high sea conditions, a large number of debris generated after the wave breaks form sea spikes, which have strong randomness and stronger intensity. The characteristics of the sea peak target are very similar to the real target. It is difficult to directly distinguish the target from the sea peak by traditional detection methods. Due to the strong sea peak intensity, it also has a shadowing effect on the weak target on the sea surface, which seriously interferes with the radar's detection of the sea target. Therefore, the suppression of sea spikes is of great significance for radar sea surface target detection. [0003] Previous studies have shown that s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G06F17/16
CPCG01S7/41G06F17/16
Inventor 周明王宁史建涛刘国庆
Owner CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST