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Stochastic radiation radar coincidence imaging method

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

Active Publication Date: 2018-11-16
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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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 stochastic radiation radar coincidence imaging method applied to the field of radar imaging technology. The invention aims to solve a problem of comparatively high matrix relevance of a radiation field under an array aperture with limited bandwidth since that the radiation field formed by a prior stochastic radiation field construction method has comparatively large redundant information. According to the invention, a space stochastic field is obtained through stochastic signals of a transmission space of a transmission antenna array and the radiation field changes stochastically over time on the basis of configured transmission signal parameters; distribution of a space-time two-dimensional stochastic radiation field is obtained according to the configuration ofan antenna array, parameters of transmission signals and target distance history and echo signals are obtained according to the distribution of the stochastic radiation field by a receiving antenna; and finally, a coincidence imaging result of a target scene is obtained according to the relation between the distribution of the stochastic radiation field and the echo signals. The method provided bythe invention ensures the orthogonality of stochastic amplitude and phase of transmission signals and enhances incoherence of an echo stochastic scattered 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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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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