Clutter suppression method based on micro-Doppler technology
A clutter suppression and micro-Doppler technology, which is applied in the field of clutter suppression based on micro-Doppler technology, can solve the problems of low precision and long time consumption, and achieve cost saving, high real-time performance and simplicity, and equipment performance less demanding effect
Pending Publication Date: 2020-11-13
上海雷骥电子科技有限公司
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[0005] The technical problem to be solved by the present invention is to provide a clutter suppression method based on micro-Doppler technology, which solves the problems of low accuracy and long time consumption of clutter suppression methods in the prior art
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[0028] Below in conjunction with accompanying drawing, structure and working process of the present invention will be further described.
[0029] This scheme proposes a clutter suppression method based on micro-Doppler technology, which separates the target and clutter through the micro-Doppler characteristic difference between the target and clutter, thereby realizing clutter suppression. The method mainly includes a radar data preprocessing module, a time-frequency analysis module, and an amplitude extraction and filtering module. In the time-frequency analysis module, the difference between the micro-Doppler frequency of the target and the clutter is analyzed, and the time-frequency diagram is obtained. By extracting the amplitude of the echo time-frequency map, the three-dimensional time-frequency domain is transformed into two-dimensional, and then after Fourier transform and filtering, the micro-frequency of clutter is filtered out, so as to realize the effective removal...
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The invention discloses a clutter suppression method based on a micro Doppler technology, and belongs to the field of radar signal processing. A radar data preprocessing module, a time-frequency analysis module and an amplitude extraction and filtering module are mainly included. A radar echo signal firstly passes through the preprocessing module to obtain radar echo data, and then the obtained radar echo data is subjected to time-frequency analysis to obtain a time-frequency graph. The amplitude extraction is performed on an echo time-frequency diagram, a three-dimensional time-frequency domain is converted into a frequency domain, and the micro-motion information of clutters is filtered through Fourier transform and filtering to obtain micro-motion information of a target. The clutter suppression method provided by the invention is simple, low in requirement on the performance of signal processing equipment and relatively high in clutter suppression precision.
Description
technical field [0001] The invention belongs to the field of radar signal processing, and in particular relates to a clutter suppression method based on micro-Doppler technology. Background technique [0002] Radar detects targets in the background of typical grassland landforms, and ground targets will be interfered by complex background signals, such as common clutter such as weeds and metal chaff released by the enemy. These clutters include both stationary targets and moving targets. Strong clutter signal interference may be generated in the radar echo signal, and may even submerge the detection target signal, seriously affecting the effective extraction of target features. Therefore, it is necessary to analyze the echo signal The clutter is suppressed. [0003] At present, the clutter suppression methods mainly include moving target display and MTD technology. MTI technology is mainly used for the suppression of fixed clutter, which is usually implemented by delay canc...
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IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 赵小纳胡涛李朝伟张楷生樊小景朱学勇
Owner 上海雷骥电子科技有限公司