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Random radiation radar three-dimensional high-resolution imaging method

A random radiation and imaging method technology, applied in the field of random radiation radar imaging, can solve the problems of not considering the correlation of different distance slices and the poor resolution of the spatial distance dimension, and achieve the goal of improving the pitch and azimuth resolution and the spatial distance resolution Effect

Inactive Publication Date: 2019-08-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, the traditional intra-pulse frequency hopping method does not consider the correlation between different distance slices, and the resolution of the spatial distance dimension is poor.

Method used

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  • Random radiation radar three-dimensional high-resolution imaging method
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  • Random radiation radar three-dimensional high-resolution imaging method

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Embodiment Construction

[0028] The present invention verifies the effectiveness of the proposed random radiation radar three-dimensional imaging method through simulation experiments. In the present invention, steps and results have been verified on the MATLAB simulation platform, and the specific implementation steps of the inventive method are as follows.

[0029] Step 1: Random Radiation Radar System Initialization

[0030] The imaging processing flowchart of the embodiment of the present invention is as follows figure 1 As shown, the schematic diagram of the geometric model of the random radiation radar system is shown in figure 2 The simulation experiment parameters of the radar system are shown in Table 1. Point target 3D original imaging scene such as image 3 As shown, the target adjacent distance is (δx, δy, δz)=(5m×3m×3m).

[0031] Table 1 Simulation experiment parameters

[0032] parameter symbol value Number of antenna elements M×N 10×10 Antenna Element Sp...

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Abstract

The invention discloses a random radiation radar three-dimensional high-resolution imaging method, which is applied to the field of radar detection and imaging. For the problem that three-dimensionalimaging cannot be carried out due to sharp decrease of the imaging resolution along the space distance dimension with the increase of signal time width in a conventional random radiation radar imagingmethod, the invention provides the method, which is characterized by, according to non-correlation of an echo signal at the sampling time, converting a traditional intra-pulse modulation mode into aninter-pulse modulation working mode; carrying out frequency hopping by utilizing narrow pulse to obtain more observation equations, and improving resolution of the space distance dimension; and carrying out echo rearrangement and recursive processing to obtain imaging results of sections at different distances, and finally, realizing three-dimensional imaging of a target scene. By changing the signal transmission form and echo processing mode, the method improves the resolution of the space distance dimension of random radiation radar three-dimensional imaging.

Description

technical field [0001] The invention belongs to the field of radar detection and imaging, in particular to a random radiation radar imaging technology. Background technique [0002] Compared with optical sensors, scene surveillance radar has the advantages of all-day and all-weather, and plays an important role in disaster monitoring and environmental safety. [0003] Literature "Budillon, A., Evangelista, A. and Schirinzi, G., 2011. Three-dimensional SAR focusing from multipass signals using compressive sampling. [J] IEEE Transactions on Geoscience and Remote Sensing, 49(1), pp.488 -499.", the author achieves three-dimensional imaging by synthesizing two-dimensional apertures. This technology uses a single-antenna multi-pass method to realize tomographic SAR three-dimensional imaging. However, due to the multi-pass process, the imaging scene will change with time. And the motion accuracy requirements between different tracks lead to the degradation of imaging quality. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/89
CPCG01S13/89
Inventor 黄钰林毛德庆张寅张永超康瑶裴季方杨建宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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