Parameter Estimation Method of Composite Micro-moving Target Based on Frequency Modulation Fuzzy Function

A technology of ambiguity function and micro-movement target, which is applied in the direction of radio wave reflection/re-radiation, instrument, measuring device, etc., and can solve the problem that motion parameter estimation cannot be realized

Active Publication Date: 2021-10-15
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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  • Parameter Estimation Method of Composite Micro-moving Target Based on Frequency Modulation Fuzzy Function
  • Parameter Estimation Method of Composite Micro-moving Target Based on Frequency Modulation Fuzzy Function
  • Parameter Estimation Method of Composite Micro-moving Target Based on Frequency Modulation Fuzzy Function

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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, estimate the frequency of modulation and generate frequency modulation ambiguity function statistics; further estimate the micro-motion period of the target; estimate the Doppler center on the basis of the obtained micro-motion period; finally, estimate the high-order translation parameters of the target.

[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 of the target is r T (t)=-t+...

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Abstract

The invention belongs to the field of radar signal processing, and relates to a method for estimating parameters of a compound micro-movement target based on a frequency modulation ambiguity function, comprising the following steps: first, calculating the frequency modulation ambiguity function of the compound micro-motion target radar signal; and then calculating the l of the frequency modulation 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. The beneficial effects of the present invention are as follows: first, the method for estimating the compound micro-motion target parameters provided by the present invention can realize the period estimation of the micro-motion under the condition of maneuvering and micro-motion compound motion, and does not need translation compensation; second, the present invention The proposed compound fretting target parameter estimation method can obtain the estimation of translational parameters while estimating the fretting 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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Patent Type & Authority Patents(China)
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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