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A method and device for suppressing space-borne full-polarization ambiguity

A fuzzy suppression and full-polarization technology, which is applied to measuring devices, instruments, and re-radiation, can solve problems such as spaceborne hybrid quadrupolar SAR azimuth ambiguity, cross-polarization azimuth ambiguity, and performance impact of spaceborne SAR systems. , to achieve the effects of suppressing ambiguity in orientation, easy engineering implementation, and simple and effective operation

Active Publication Date: 2022-05-24
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

However, it has serious cross-polarization azimuth ambiguity, which will have a serious impact on the system performance of spaceborne SAR.
There are few reports at home and abroad that can effectively suppress the azimuth ambiguity of spaceborne hybrid quadrupolar SAR

Method used

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  • A method and device for suppressing space-borne full-polarization ambiguity
  • A method and device for suppressing space-borne full-polarization ambiguity
  • A method and device for suppressing space-borne full-polarization ambiguity

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Embodiment Construction

[0047] In order to have a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0048] figure 1 This is a schematic flowchart of a method for suppressing full polarization ambiguity on board an embodiment of the application, as shown in figure 1 As shown, the method includes:

[0049] Step 101, alternately transmitting left-handed L elliptical polarized waves and right-handed R elliptical polarized waves with unequal amplitude horizontal H and vertical V polarization vectors;

[0050] The expressions of the L elliptical polarized wave and the R elliptical polarized wave are:

[0051] Among them, α is a weighting factor, and 0<α<1, j is an imaginary unit.

[0052] Step 102, using H and V polarized antennas to simultaneously receive the echo signals of the L elliptical po...

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Abstract

The embodiment of the present application discloses a method for suppressing full-polarization ambiguity on board, including: alternately transmitting left-handed L-elliptical polarized waves and right-handed R-elliptical polarized waves with unequal amplitude horizontal H and vertical V polarization vectors; using The H and V polarized antennas simultaneously receive the radar echo signals of the L elliptical polarized wave and the R elliptical polarized wave to obtain an elliptically polarized echo signal matrix; convert the elliptically polarized echo signal matrix into a linear polarized wave aligning the echo signal matrix; suppressing the azimuth ambiguity of the cross-polarized echo signal of the linearly polarized echo signal matrix. The embodiment of the present application also discloses an on-board full-polarization blur suppression device.

Description

technical field [0001] The present invention relates to synthetic aperture radar (Synthetic Aperture Radar, SAR) technology, in particular to a spaceborne full polarization ambiguity suppression method and device. Background technique [0002] Quad-Polar Synthetic Aperture Radar (Quad-Pol SAR) has the characteristics of all-weather and all-weather, and can achieve tasks such as high-resolution polarimetric imaging, polarimetric interferometric altimetry and deformation, land vegetation inversion, and moving target detection. [0003] The traditional Quad-Pol SAR irradiates the target by alternately emitting H-polarized and V-polarized electromagnetic waves, and obtains HH, HV, VH and VV polarization images, and then realizes tasks such as polarization interferometry. However, due to the serious range ambiguity of the traditional quadrupole SAR, and for the spaceborne SAR, the Faraday rotation effect of the ionosphere on the electromagnetic wave will have a serious impact on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S7/36
CPCG01S13/90G01S7/36
Inventor 张岩岩王宇刘开雨邓云凯
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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