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Method for estimating rotation target parameter under vibration disturbance condition

A technology of vibration interference and target parameters, which is applied in the field of radar signal processing technology and radar target recognition, can solve the problems that the accurate parameter estimation of target rotation and image reconstruction cannot be realized at the same time, influence, vibration interference and other problems of target rotation component parameter estimation accuracy , to achieve fast and stable signal separation, high measurement accuracy, and good image reconstruction quality

Active Publication Date: 2017-07-14
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for estimating the parameters of a rotating target under the condition of vibration disturbance. Realization; the technical problem that the accuracy of parameter estimation of the rotational component of the target is seriously affected by vibration interference

Method used

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  • Method for estimating rotation target parameter under vibration disturbance condition
  • Method for estimating rotation target parameter under vibration disturbance condition
  • Method for estimating rotation target parameter under vibration disturbance condition

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example 1

[0089] Example 1: Assuming a target with three rotating scattering centers P1, P2 and P3 by means of data simulation, the rotating radii of these three scattering centers are 0.25m, 0.2m and 0.15m respectively, and the initial phases are -30° , 30° and 100°, the rotation speed is 5r / min, the amplitude and frequency of vibration disturbance are 1mm and 2Hz respectively. The time-frequency distribution without considering and considering the vibration disturbance is as follows image 3 shown. Among them, the results including vibration disturbance are obtained according to conventional methods. The result obtained after adopting the method provided by the present invention to process is as follows:

[0090] image 3 The inverse Radon transform of the echo time-frequency distribution in the two cases shown is as follows Figure 4 shown. It can be seen that after transformation, the parameter space displays an area instead of a prominent point. This area is defocused due to vib...

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Abstract

The invention provides a method for estimating a rotation target parameter under a vibration disturbance condition. The method is characterized by introducing a narrowband terahertz radar system with a frequency band between those of a microwave and a laser; providing a fast and effective signal processing method by means of signal processing means such as inverse Radon transform, time-frequency analysis and inverse transform thereof, and the like; and achieving the separation estimation and compensation of vibration disturbance and the parameter estimation and image reconstruction of the rotation for the rotation target accompanied by vibration disturbance. The method is highly efficient and stable, and does not enhance system complexity.

Description

technical field [0001] The invention relates to the fields of radar signal processing technology and radar target recognition technology, in particular to a method for realizing parameter estimation of a rotating target under vibration interference conditions. Background technique [0002] It is a widely used method to realize the extraction of target motion characteristics by means of radar, which has the characteristics of all-time, all-weather, high precision, etc., and has very important applications in remote sensing measurement, military reconnaissance and other aspects. The Terahertz (THz) frequency band usually refers to electromagnetic waves with a frequency between 0.1THz and 10THz (corresponding to a wavelength of 30μm-3mm). Its frequency is between millimeter waves and infrared light, and it is in the transition from macroelectronics to microphotonics. The frequency band occupies a very special position in the electromagnetic spectrum and has special properties d...

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Application Information

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IPC IPC(8): G01S7/41G01S7/02
CPCG01S7/023G01S7/41
Inventor 邓彬王宏强杨琪秦玉亮范波罗成高
Owner NAT UNIV OF DEFENSE TECH
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