Efficient and steady multi-baseline UKF phase-unwrapping method

A phase unwrapping and multi-baseline technology, which is applied in the radio wave measurement system, radio wave reflection/re-radiation, and re-radiation, can solve the problems of low efficiency and performance, improve efficiency, improve algorithm accuracy, and improve algorithms efficiency effect

Active Publication Date: 2015-08-19
GUILIN UNIV OF ELECTRONIC TECH
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AI Technical Summary

Problems solved by technology

[0005] What the present invention is to solve is the problem of low efficiency and performance of the existing multi-baseline phase unwrapping method, and provides an efficient and robust multi-baseline UKF phase unwrapping method

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  • Efficient and steady multi-baseline UKF phase-unwrapping method

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Embodiment Construction

[0023] An efficient and robust multi-baseline UKF phase unwrapping method, which specifically includes the following steps:

[0024] Step 1: Use the joint phase gradient estimation technique based on AMPM to obtain the long baseline interferometric phase gradient estimation information from the short baseline interferogram.

[0025] Step 2: Define the interferogram path guide map, normalize the interferogram path guide map and quantize it into an integer to guide the phase unwrapping path.

[0026] Step 3: Combining with the strategy of quantitative path guidance map, and on the basis of obtaining the long-baseline interferometric phase gradient, use the UKF phase unwrapping algorithm to directly expand the long-baseline interferogram along the path from the high-quality area to the low-quality area of ​​the interferogram. which is

[0027] Step 3.1: Create an empty queuing array, define the pointer opt pointing to the pixel to be expanded with the largest guiding value of th...

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Abstract

The invention discloses an efficient and steady multi-baseline UKF phase-unwrapping method. The efficient and steady multi-baseline UKF phase-unwrapping method comprises the following steps: firstly, obtaining long baseline interferometric phase gradient estimation information from a shorter baseline interferogram by utilizing a combined phase gradient estimation technology based on AMPM; defining an interferogram path guide figure, normalizing and quantizing the interferogram path guide figure into an integer guide phase unwrapping path; by combining a quantization path guide figure strategy, directly unwrapping long baseline interferogram along a path by utilizing the UKF phase-unwrapping method from an interferogram high-quality region to an interferogram low-quality area on the basis of obtaining long baseline interferometric phase gradient. According to the efficient and steady multi-baseline UKF phase-unwrapping method, not only can algorithm accuracy be improved, but also the algorithm efficiency can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of interference synthetic aperture radar, in particular to an efficient and robust multi-baseline UKF phase unwrapping method. Background technique [0002] Interferometry Synthetic Aperture Radar (InSAR) uses two antennas to observe the ground at the same time or a single antenna to observe the ground twice in parallel to obtain the three-dimensional information of the target area. It has fast, efficient, accurate and large-scale acquisition of three-dimensional surface The ability of information provides a more direct and effective method for monitoring targets and managing a wide range of environmental problems, and has been widely used in the construction of geographic information systems (Geographic Information System, GIS), environmental monitoring and early warning and other fields. [0003] The multi-baseline InSAR technology can solve the contradiction between the high fuzzy number of the system and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S13/904G01S13/9023
Inventor 谢先明
Owner GUILIN UNIV OF ELECTRONIC TECH
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