Interference Phase Unwrapping Method Using JVC Algorithm to Generate Branch Cuts

Zhaoxia WANG; Yongxin LIU; Jie ZHANG; Chenqing FAN

doi:10.11999/JEIT200086

Volume 43 Issue 6

Jun. 2021

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Article Navigation > Journal of Electronics & Information Technology > 2021 > 43(6): 1683-1690

Zhaoxia WANG, Yongxin LIU, Jie ZHANG, Chenqing FAN. Interference Phase Unwrapping Method Using JVC Algorithm to Generate Branch Cuts[J]. Journal of Electronics & Information Technology, 2021, 43(6): 1683-1690. doi: 10.11999/JEIT200086

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Zhaoxia WANG, Yongxin LIU, Jie ZHANG, Chenqing FAN. Interference Phase Unwrapping Method Using JVC Algorithm to Generate Branch Cuts[J]. Journal of Electronics & Information Technology, 2021, 43(6): 1683-1690. doi: 10.11999/JEIT200086

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Interference Phase Unwrapping Method Using JVC Algorithm to Generate Branch Cuts

doi: 10.11999/JEIT200086 cstr: 32379.14.JEIT200086

1.
College of Computer Science, Inner Mongolia University, Hohhot 010021, China
2.
College of Electronic Information Engineering, Inner Mongolia University, Hohhot 010021, China
3.
First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China

Funds: The National Key R&D Plan (2017YFC1405600), The Youth Innovation Fund Project in Marine Telemetry Engineering Technology Research Center of Ministry of Natural Resources (2017002)

Received Date: 2020-01-28
Rev Recd Date: 2020-12-15

Available Online: 2021-01-05

Publish Date: 2021-06-18

Abstract

Abstract

Three-dimensional imaging of sea surface altitude is a technology realized with the launch of Tiangong-2. Phase unwrapping is a key step in elevation inversion of three-dimensional radar imaging altimeter. In order to improve the branch cut algorithm proposed by Goldstein, shorten the total length of branch cuts in interferogram and advance the accuracy of phase unwrapping, a method that based on Jonker-Volgenant-Castanon (JVC) global optimal linear assignment algorithm to generate branch cuts is proposed in this paper. At first, all residual points in the interferogram are found out, and the distance between all opposite polarity pairs is calculated. Then, by comparing the distance between each pair of residual points and the distance sum between both of them and the nearest boundary, it is determined whether to place the branch cuts directly between the residual points and the boundaries or to use JVC algorithm. So, the shortest total length of the balanced branch cuts is obtained. The experiments of unwrapping are carried out by using the interferogram both of simulated three-dimensional imaging altimeter sea surface elevation and Etna volcano area. By comparison with the other three algorithms, it shows that the error between the unwrapping result of the proposed algorithm and the real phase value is relatively small. Also, it can void the “islanding phenomenon” effectively.
- Phase unwrapping,
- Three-dimensional imaging altimeter,
- Jonker-Volgenant-Castanon(JVC) algorithm,
- Branch cuts

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References(16)

References

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