Marine radar target rapid detection method based on support vector machine

Abstract

The invention discloses a marine radar target rapid detection method based on a support vector machine. The method includes the steps that first, a field observation test is carried out offline, a certain amount of two types of radial echo samples on a single scanning line are selected, one type of radial echo samples contain target radar echoes, the other type of radial echo samples do not contain target pure sea clutter radar echoes, two appropriate radial echo characteristic parameters are extracted according to the characteristics of the samples, and a classifier model is obtained by training through an SVM; second, data to be measured on the radar single scanning line are acquired, the values of the data to be measured in the two radial echo characteristics in the first step are calculated and input to the classifier model, and a corresponding decision function value K is obtained; and final, the obtained decision function value K is compared with a threshold value of a classifier, and whether a target exists on the single scanning line or not is judged. According to the method, the target detection efficiency can be effectively improved, and false alarms can be reduced.

Description

technical field [0001] The invention relates to a rapid detection method for a nautical radar target, in particular to a rapid detection method for a nautical radar target based on a support vector machine, and belongs to the technical field of ship target detection under marine environmental conditions. The working principle is the X-band marine radar of the monopulse system. Background technique [0002] Over the past few decades, with the development and progress of science and technology, radar technology has developed rapidly and has been widely used in ship navigation, target search and other fields. In the field of ship navigation, the problem of target detection under the background of sea clutter has always been a hot research topic, and it plays a vital role in ensuring the safety of ships. [0003] At present, the commonly used target detection technology is the constant false alarm rate (CFAR, constant false alarm rate) detection technology. According to the di...

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Problems solved by technology

[0004] In terms of detection efficiency, the current CFAR detectors published in the literature all use point-by-point scanning detection for target detection. With the increase in the complexity of CFAR algorithms, As well as the refinement of radar resolution, the impact of target detection speed on the radar system can no longer be ignored

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