Composite micro-motion target parameter estimation method based on frequency modulation fuzzy function

A fuzzy function, micro-moving target technology, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc., can solve the problem of inability to estimate motion parameters

Active Publication Date: 2021-06-04
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

However, this method can only deal with compound micro-movement targets containing second-order polynomial translation, and cannot realize the estimation of other target motion parameters

Method used

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  • Composite micro-motion target parameter estimation method based on frequency modulation fuzzy function
  • Composite micro-motion target parameter estimation method based on frequency modulation fuzzy function
  • Composite micro-motion target parameter estimation method based on frequency modulation fuzzy function

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Experimental program
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Embodiment Construction

[0047] The present invention will be further described below in conjunction with accompanying drawing:

[0048] figure 1 It is a flow chart of compound micro-motion target parameter estimation proposed by the present invention. Firstly, calculate the FM ambiguity function of the complex micro-moving target radar signal; then calculate the l of the FM ambiguity function 4 -l 2 Norm; in obtaining the l of the FM ambiguity function 4 -l 2 On the basis of the norm, the frequency modulation frequency is estimated and the frequency modulation fuzzy function statistics are generated; the micro-motion period of the target is further estimated; the Doppler center is estimated on the basis of the micro-motion period obtained; finally, the high-order translation parameters of the target are estimated.

[0049] figure 2 is the processing result of the complex micro-moving target radar signal. In this experiment, the fretting period of the target is 2s, and the translational motion ...

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Abstract

The invention belongs to the field of radar signal processing, and relates to a composite micro-motion target parameter estimation method based on a frequency modulation fuzzy function. The method comprises the following steps of: firstly, calculating a frequency modulation fuzzy function of a composite micro-motion target radar signal; then, calculating the l4-l2 norm of the frequency modulation fuzzy function; on the basis of obtaining the l4-l2 norm of the frequency modulation fuzzy function, estimating a frequency modulation rate and generating a frequency modulation fuzzy function statistic; further estimating the micro-motion period of the target; estimating a Doppler center on the basis of obtaining the micro-motion period; and finally, estimating a high-order translation parameter of the target. The beneficial effects of the method are that firstly, the composite micro-motion target parameter estimation method can achieve the estimation of the micro-motion period under the condition of the maneuvering and micro-motion composite motion, and does not need to carry out the translation compensation; and secondly, the composite micro-motion target parameter estimation method provided by the invention can obtain the estimation of the translation parameter while estimating the micro-motion period.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and relates to a method for estimating compound fine-moving target parameters based on frequency modulation fuzzy functions among radar target parameter estimation methods. Background technique [0002] Radar target detection and recognition is an important research direction in the field of sensor information processing. Through the processing of radar echo signals, the target's trajectory, speed, shape, size, electromagnetic parameters and other information can be obtained. Radar observation targets are usually non-cooperative targets, and with the development of target feature control technologies such as stealth and camouflage and target jamming technologies such as false target imaging, the recognition based on traditional radar features such as target shape and size is challenged, and the specific movement of targets Further mining of information is a feasible way to deal with this ch...

Claims

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Application Information

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IPC IPC(8): G01S13/50
CPCG01S13/50
Inventor 张文鹏龚婷杨威
Owner NAT UNIV OF DEFENSE TECH
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