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Estimation method for rotation micro Doppler frequency based on radar HRRP (High Resolution Range Profile)

A high-resolution range image and micro-Doppler technology, which is applied to the estimation of radar target micro-motion parameters, uses the rotating micro-motion target radar high-resolution range image to estimate the micro-Doppler frequency of the target, and can solve the problem of less time-consuming calculation

Inactive Publication Date: 2016-06-15
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: use the high-resolution range image of the radar target to complete the reliable estimation of the micro-Doppler frequency of the rotating micro-moving target. This method not only consumes less time for calculation but also has accurate estimation results

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  • Estimation method for rotation micro Doppler frequency based on radar HRRP (High Resolution Range Profile)
  • Estimation method for rotation micro Doppler frequency based on radar HRRP (High Resolution Range Profile)
  • Estimation method for rotation micro Doppler frequency based on radar HRRP (High Resolution Range Profile)

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Embodiment Construction

[0040] figure 1 It is a schematic flow chart of the rotating micro-Doppler frequency estimation method based on the radar high-resolution range image proposed by the present invention. The present invention includes the following steps: the first step is to obtain the high-resolution range image of the radar target, and the high-resolution range corresponding to each echo The image is arranged in rows to construct a two-dimensional matrix; the second step is to calculate the circular correlation coefficient matrix corresponding to the high-resolution distance image matrix by row; the third step is to calculate the average circular correlation coefficient; the fourth step is to search for the peak value of the average circular correlation coefficient And calculate the average value, and take the reciprocal of the average value to estimate the rotating micro-Doppler frequency. Attached below Figure 2-4 The present invention is further described.

[0041] The first step is to ...

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Abstract

The invention relates to an estimation method for the rotation micro Doppler frequency based on radar HRRP. The estimation method comprises the following steps that 1) HRRPs of a radar object are obtained, and the HRRPs corresponding to different echoes are arranged in rows to form a 2D matrix; 2) a cycle correlation coefficient matrix corresponding to the HRRP matrix is calculated in rows; 3) average cycle correlation coefficients are calculated; and 4) the peak value and mean value of the average cycle correlation coefficients are searched, and a reciprocal of the mean value is taken to estimate the rotation micro Doppler frequency. The method provided by the invention can be used to estimate the rotation micro Doppler frequency accurately, and is robust under the adverse conditions as that the HRRPs are discontinuous, and calculation of an estimation result consumes less time.

Description

【Technical field】 [0001] The invention belongs to the field of microwave detection and identification, and in particular relates to a radar target micro-motion parameter estimation technique, in particular to a method for estimating target micro-Doppler frequency by using a rotating micro-motion target radar high-resolution range image. 【Background technique】 [0002] In the field of radar detection, the target and its components often have subtle motion states such as swinging and rotating relative to the target's macroscopic motion, such as the swing of the arms and legs of a pedestrian, the vibration of the hood when the car is started, and the rotation of the rotor when the helicopter is flying. These movements are generally collectively referred to as fretting. The micro-motion will modulate the radar signal, and the formed radar target echo signal contains a rapidly changing periodic modulation component. This phenomenon is called the radar micro-Doppler frequency modu...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S13/50
CPCG01S7/415G01S13/50
Inventor 潘小义王伟冯德军傅其祥顾赵宇刘永才徐乐涛肖顺平张文明
Owner NAT UNIV OF DEFENSE TECH
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