Micro-motion target characteristic extraction method and system based on wavelet multi-scale analysis
A multi-scale analysis, micro-moving target technology, applied in the field of micro-moving target feature extraction, which can solve the problems of shortened identification distance of defense system, difficulty of identification of defense system, limited identification time of defense system, etc.
Active Publication Date: 2015-03-25
BEIJING INST OF ENVIRONMENTAL FEATURES
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At the same time, the identification of ballistic missiles is also very challenging: the extremely high flight speed makes the identification time of the defense system very limited, and the application of stealth technology greatly shortens the identification distance of the defense system. The comprehensive application of jamming means brings great difficulty to the identification of the defense system
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[0052] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0053] Ballistic missiles mainly undergo motion processes such as lift-off launch, head-body separation, decoy release, orbital flight, and re-entry flight. In the mid-flight of the warhead, the speed and attitude are relatively stable, the external interference is small, and the tracking and identification system has sufficient reaction time, which is an important stage for the defense system to identify and intercept ballistic targets.
[0054] At the same time, the warhead separates the first and last stages at the beginning of the mid-flight, and some of them will drop light and heavy bait and other penetrating devices. These accompanying flying objects form a threat target group and the warhead will perform inertial flight outside the atmosphere at a...
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The invention provides a micro-motion target characteristic extraction method and system based on wavelet multi-scale analysis. The micro-motion target characteristic extraction method based on wavelet multi-scale analysis comprises the steps that a micro Doppler model of a precessional motion target and a micro Doppler model of a rolling target are established, narrow-band radar scattering cross section data of the precessional motion target and narrow-band radar scattering cross section data of the rolling target are obtained based on ballistic trajectory simulation, the high-frequency component of the narrow-band radar scattering cross section data of the precessional motion target and the high-frequency component of the narrow-band radar scattering cross section data of the rolling target are extracted by means of wavelet multi-scale analysis, and column diagram characteristics are extracted aiming at the high-frequency component of the precessional motion target and the high-frequency component of the rolling target. According to the micro-motion target characteristic extraction method based on wavelet multi-scale analysis, the micro Doppler high-frequency components of the targets in different micro-motion forms are separated out by means of wavelet multi-scale analysis, new characteristics are extracted for recognizing the truth of targets, and the recognition accuracy of precessional motion targets and rolling targets is improved.
Description
technical field [0001] The invention relates to the technical field of radar target recognition, in particular to a method and system for extracting micro-moving target features based on wavelet multi-scale analysis. Background technique [0002] In recent years, in many fields of radar target recognition technology, ballistic missile target recognition technology occupies a unique and important position. Ballistic missiles have become offensive weapons developed by all military powers due to their long attack distance, fast speed, high hit accuracy, strong suddenness, and high lethality. There are countless ballistic missiles of different models and ranges in the United States, Russia and other military powers. Some countries and regions around my country have also accelerated the development of ballistic missile technology. This is an increasingly serious threat to my country's national security. At the same time, the identification of ballistic missiles is also very chal...
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IPC IPC(8): G01S7/41G06F19/00
CPCG01S7/41
Inventor 田雨光宁超张向阳
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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