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A Random Radiation Radar Correlation Imaging Method

A random radiation and correlation imaging technology, applied in the direction of re-radiation, radio wave reflection/re-radiation, instruments, etc., can solve the problems of high redundant information and high matrix correlation, so as to enhance non-correlation and ensure orthogonality sexual effect

Active Publication Date: 2020-06-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, the random radiation field construction method described in the literature contains high redundant information in the formed radiation field distribution, and the matrix correlation of the radiation field is high under the array aperture with limited bandwidth

Method used

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  • A Random Radiation Radar Correlation Imaging Method
  • A Random Radiation Radar Correlation Imaging Method
  • A Random Radiation Radar Correlation Imaging Method

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Embodiment Construction

[0028] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0029] The simulation experiment of the present invention is all carried out on the Matlab 2015b simulation platform, as figure 1 Shown is a schematic diagram of the geometric structure of the associated imaging provided by the present invention, xyz in the figure represents the spatial coordinate axis, Ω represents the imaging target scene, and the scene in the simulation includes K*L points, K and L represent respectively along the x axis and y The number of target points in the axial direction, as shown in Table 1, is the simulation parameters used in the present invention, and M and N represent the row number and column number of transmitting array elements along the x-axis and y-axis directions respectively.

[0030] Table 1 Simulation param...

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Abstract

The invention discloses a random radiation radar correlation imaging method, which is applied in the technical field of radar imaging. Aiming at the existing random radiation field construction method, the formed radiation field distribution contains relatively high redundant information, and radiates under the limited bandwidth array aperture. For the problem of high field matrix correlation, the present invention first obtains the spatial random field by transmitting the random signal of the space through the transmission antenna array, and then the radiation field changes randomly with time on the basis of preparing the transmission signal parameters; according to the configuration of the antenna array , the parameters of the transmitted signal and the target distance history to obtain the distribution of the space-time two-dimensional random radiation field, and the echo signal is obtained by the receiving antenna according to the distribution of the random radiation field; finally, the relationship between the distribution of the random radiation field and the echo signal is obtained Correlated imaging results of the target scene; the method of the invention ensures the orthogonality of the random amplitude and phase of the transmitted signal, and enhances the non-correlation of the echo random scattering field.

Description

technical field [0001] The invention belongs to the technical field of radar imaging, in particular to a radar correlation imaging technology. Background technique [0002] Because of its all-weather and all-weather characteristics, radar imaging is widely used in military and civilian fields. Traditional real-aperture radars use real large-aperture antennas or array antennas to generate narrow beams to obtain high azimuth resolution capabilities, but in fact the aperture azimuth resolution is still limited. Therefore, radar uses random radiation signals to construct a space-time two-dimensional random radiation field to obtain more target observation information, which plays an important role in realizing radar high-resolution imaging. [0003] Literature "Xu, R., Li, Y., Xing, M., & Shao, P. (2014, October). 3-D ghost imaging with microwave radar. In Imaging Systems and Techniques (IST), 2014IEEEInternational Conference on (pp. 190-194).IEEE.", the author uses the phased...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/89G01S7/41
CPCG01S7/41G01S13/89
Inventor 张寅毛德庆聂宪波张永伟张永超黄钰林杨建宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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