Multi-Baseline Phase Unwrapping Method Based on Plane Approximation Model

A phase unwrapping and approximation model technology, applied in the field of radar signal processing, can solve the problem of poor noise robustness and achieve the effect of improving noise robustness

Active Publication Date: 2020-07-03
XIDIAN UNIV
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Problems solved by technology

[0005] In view of the above problems, the object of the present invention is to provide a multi-baseline phase unwrapping method based on a plane approximation model, which can solve the problem of poor noise robustness of multi-baseline phase unwrapping under noise interference

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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] Multiple interferograms can be obtained from a multi-baseline InSAR system. The present invention will be described below by taking the case where the number of baselines is 2. For the case where the number of baselines is greater than 2, it can be deduced in the same way.

[0031] An embodiment of the present invention provides a multi-baseline phase unwrapping method based on a plane approximation model, such as figure 1 As shown, the method includes ...

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Abstract

The invention belongs to the field of radar signal processing, and discloses a multi-baseline phase unwrapping method based on a plane approximation model. The method comprises steps: an interferencephase diagram is acquired; the wrapping phase gradient of the interference phase diagram is calculated; fuzzy number gradient estimation based on plane approximation is then carried out; a fuzzy number is solved through an MCF model; the absolute phase is calculated according to the fuzzy number and the wrapping phase; and a phase unwrapping result is obtained. Thus, the problem of poor noise robustness for multi-baseline phase unwrapping under noise interference can be solved.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and in particular relates to a multi-baseline phase unwrapping method based on a plane approximation model, which is applicable to multi-baseline phases of a multi-baseline interferometric synthetic aperture radar (InSAR) system after registration, filtering and de-leveling Untangle the problem. Background technique [0002] As the development of traditional SAR, InSAR system can work around the clock and has been widely used in many aspects such as terrain surveying and mapping, surface deformation monitoring and natural disaster detection. Therefore, the development of InSAR technology has always been highly valued. [0003] Compared with single-baseline InSAR, multi-baseline InSAR can use multiple interferometric phase images to break through the "phase continuity assumption" and realize high-precision mapping of complex terrain (such as canyons, steep cliffs, etc.). This advan...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
Inventor 邢孟道蓝洋于瀚雯
Owner XIDIAN UNIV
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