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A Sea Clutter and Cloud-Rain Clutter Suppression Algorithm

A technology of clutter suppression and sea clutter, applied in radio wave measurement systems, instruments, etc., can solve problems such as difficulty in guaranteeing constant false alarm characteristics, impact of CFAR detector detection performance, etc., to solve sea clutter and cloud and rain clutter Power statistics issues, avoid target loss, achieve automatic effects

Active Publication Date: 2018-10-23
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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AI Technical Summary

Problems solved by technology

However, various existing CFAR (Constant False Alarm) detectors assume that the clutter (or noise) background obeys a certain statistical distribution model
Once the actual clutter amplitude deviates from the assumed statistical distribution model, the detection performance of the CFAR detector will inevitably be affected, and even its constant false alarm characteristics may be difficult to guarantee

Method used

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  • A Sea Clutter and Cloud-Rain Clutter Suppression Algorithm
  • A Sea Clutter and Cloud-Rain Clutter Suppression Algorithm
  • A Sea Clutter and Cloud-Rain Clutter Suppression Algorithm

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Embodiment Construction

[0038] The invention discloses a sea clutter and cloud rain clutter suppression algorithm, such as figure 1 shown, including the following steps:

[0039] S1: Establish an adaptive clutter power statistical map based on the radar video signal: through the input data of the original radar video signal, generate two-dimensional clutter power statistical data in azimuth and distance, and the generated two-dimensional statistical data are separated between sweeps and scans Iteratively updating between intervals to finally generate slowly changing clutter power statistical data; while in the statistical calculation, methods such as azimuth and distance two-dimensional sampling and sorting are used to improve calculation efficiency, and at the same time remove the interference effect of the target on the generated two-dimensional clutter map . Its calculation is divided into the following three parts.

[0040](1) The idea of ​​using the sorting method to count the clutter / noise po...

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Abstract

The invention discloses a sea clutter and cloud and rain clutter inhibition algorithm. The algorithm comprises the following steps that S1) a self-adaptive clutter power statistical chart based on radar video signals is established; S2) a lossless data compression and decompression algorithm is used to manage and store generated clutter power statistic data; S3) clutters are inhibited by utilizing two accumulation while scanning methods; and S4) two paths of detection video data generated in the step S3), original video signal input data of a radar and the self-adaptive clutter power statistical data, calculated in the step S1), of the present position are calculated to obtain a final sea clutter and cloud and rain clutter inhibited detection video, and the final detection video is used for object detection. The self-adaptive clutter power statistical algorithm of the invention is effectively and high-efficiency, and can be used to solve the power in calculating the sea clutter and cloud and rain clutter power.

Description

technical field [0001] The invention relates to radar video signal processing technology, in particular to a sea clutter and cloud rain clutter suppression algorithm. Background technique [0002] Radar clutter is defined as the echo signals received by the radar and reflected by various objects that are not expected to be detected. These unwanted echo signals "disrupt" the radar's operation, making detection of echoes from targets of interest difficult. Radar clutter includes echoes from land, weather (especially rain), sea, insects, and birds. Sea clutter refers to radar returns from the sea surface other than the target of interest. Clutter is the inherent environment for radar target detection. Accurate and efficient target detection under clutter background is the basic task of radar signal processing. The target detection technology under the background of sea clutter or cloud and rain clutter has always been an important topic and research direction in the fields o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 萨出拉顾晶皇甫一江翟海涛常传文赵玉丽刘文王远斌刘畅郑浩
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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