Bistatic synthetic aperture radar wave number domain efficient imaging processing method

A technology of synthetic aperture radar and imaging processing, which is applied in the radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve the problems of high computational complexity and low efficiency, and achieve the goal of improving the efficiency of imaging processing Effect

Active Publication Date: 2019-10-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high computational complexity and low efficiency in the traditional bistatic synthe

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  • Bistatic synthetic aperture radar wave number domain efficient imaging processing method
  • Bistatic synthetic aperture radar wave number domain efficient imaging processing method
  • Bistatic synthetic aperture radar wave number domain efficient imaging processing method

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Embodiment Construction

[0052] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0053] see figure 1 , the present invention proposes a bistatic synthetic aperture radar wavenumber domain high-efficiency imaging processing method, which is realized by the following steps:

[0054] S1. The receiving antenna receives the echo signal propagated by the transmitting antenna, establishes a coordinate system in the spatial spectrum domain, and projects the echo signal to the spatial spectrum domain.

[0055] In this embodiment, the geometric configuration of the bistatic SAR is as follows figure 2 As shown, the bistatic synthetic aperture radar includes at least one transmitting antenna and receiving antenna.

[0056] exist figure 2 In the three-dimensional coordinate system shown, the transmitting antenna and the receiving antenna are in a plane with a height of H, and move along the x-axis direction at a speed v; the coordinates of a...

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Abstract

The invention provides a bistatic synthetic aperture radar wave number domain efficient imaging processing method, and belongs to the technical field of radar detection and imaging. The method is usedfor improving the imaging processing efficiency of a bistatic synthetic aperture radar. The method comprises the following steps: firstly, obtaining a bistatic synthetic aperture radar echo signal model according to a geometric configuration of the bistatic radar; secondly, obtaining the echo imaging processing efficiency in different rotating coordinate systems by utilizing relations between thespatial spectrum processing efficiency and the rotating coordinate systems; thirdly, calculating out a most efficient rotation angle by utilizing a relation between the rotation angle and the processing efficiency; and finally, establishing the rotating coordinate system according to the most efficient rotation angle, projecting echo data to a spatial spectral domain, and realizing efficient imaging processing of a target by utilizing two-dimensional FFT. According to the method, based on the relation between the rotation angle of the bistatic synthetic aperture radar and the spatial spectrumprocessing efficiency, the efficient echo projection rotation angle is calculated, so that the imaging processing efficiency of the bistatic synthetic aperture radar is improved.

Description

technical field [0001] The invention belongs to the technical field of radar detection and imaging, and in particular relates to a high-efficiency imaging processing method in the wavenumber domain of a bistatic synthetic aperture radar. Background technique [0002] Radar imaging has important application value in natural disaster monitoring and ground mapping. Bistatic SAR separates the transceiver platform, which makes the observation more flexible, and has been widely researched on various high-efficiency potentials in target detection, anti-jamming and high-resolution imaging. However, in the imaging process of bistatic SAR, its imaging processing efficiency still needs to be improved. [0003] In the prior art, there is a method for realizing target reconstruction by a double-base fast back-projection algorithm. However, this method is relatively time-consuming due to the need to traverse the echo track of each target. In addition, there is also a method of applying ...

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Application Information

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IPC IPC(8): G01S13/90G01S7/295G01S7/41
CPCG01S7/2955G01S7/41
Inventor 张寅毛德庆黄一桂张永伟张永超裴季方黄钰林杨建宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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