Bispectrum three-feature-based sea surface target detection method and system

Abstract

The invention provides a Bispectrum three-feature-based sea surface target detection method and system, and the method comprises the steps of obtaining a to-be-detected signal, and constructing a diagonal integral bispectrum of the to-be-detected signal; extracting spectral features from the diagonal integral bispectrum and accumulating to obtain three bispectrum features, building a three-feature space, and obtaining feature points of the to-be-detected signal, wherein the double-spectrum three features comprise a cumulative peak value, a cumulative spectrum width and total variation; and performing detection classification on the feature points of the to-be-detected signal to obtain a target detection result. According to the Bispectrum three-feature-based sea surface target detection method and system, the diagonal integral bispectrum of the to-be-detected signal is constructed, the three features of the cumulative peak value, the cumulative spectral width and the total variation are conveniently extracted, target detection is carried out by fusing the feature points of the three features, a target unit and a clutter unit can be better distinguished, and the obtained target detection result is more accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a sea surface target detection method and system based on bispectrum and three features. Background technique [0002] In the field of radar detection, the detection of slow and small targets on the sea surface is generally realized in two ways: energy detection method and feature detection method. Among them, the energy detection method mainly constructs the likelihood ratio based on the local amplitude or power level information of the sea clutter, forms the detection threshold according to the threshold factor, and makes a judgment on whether the target exists or not. The radar dwell time required by this method is short, but the signal-to-clutter ratio of the target is high, and it is easy to cause a large number of false alarms in the scene of dense sea peaks. [0003] The feature detection method mainly converts the two from the observation space with high overla...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a sea surface target detection method and system based on bispectrum and three features to solve the technical problem of inaccurate sea surface target detection results in the prior art

Images