离散优化框架下的多基线InSAR相位解缠方法

doi:10.11947/j.AGCS.2024.20220617

测绘学报 ›› 2024, Vol. 53 ›› Issue (3): 473-481.doi: 10.11947/j.AGCS.2024.20220617

离散优化框架下的多基线InSAR相位解缠方法

岳佳伟¹, 黄其欢¹, 刘辉², 马张烽³

1. 河海大学地球科学与工程学院, 江苏南京 211100;
2. 华北水利水电大学测绘与地理信息学院, 河南郑州 450046;
3. 南洋理工大学新加坡地球观象站, 新加坡 639798

收稿日期:2022-10-28 修回日期:2023-08-24 发布日期:2024-04-08
通讯作者: 黄其欢 E-mail:InSAR@hhu.edu.cn
作者简介:岳佳伟(1999—),男,硕士生,研究方向为多基线InSAR相位解缠。E-mail:yjw1679382031@163.com
基金资助:
国家自然科学基金(42274038;41901411);河南省高等学校青年骨干教师培养计划项目(2021GGJS073);河海大学优硕培育项目(422003519)

A multi-baseline phase unwrapping method based on a discrete optimization framework

YUE Jiawei¹, HUANG Qihuan¹, LIU Hui², MA Zhangfeng³

1. School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China;
2. College of Surveying and Geo-Information, North China University of Water Resources and Electric Power, Zhengzhou 450046, China;
3. Earth Observatory of Singapore, Nanyang Technological University, Singapore 639798

Received:2022-10-28 Revised:2023-08-24 Published:2024-04-08
Supported by:
The National Natural Science Foundation of China (Nos. 42274038; 41901411); Training Plan for Young Backbone Teachers of Colleges and Universities in Henan Province (No. 2021GGJS073); Project on Excellent Post-graduate Dissertation of Hohai University (No. 422003519)

摘要/Abstract

摘要： 多基线相位解缠技术通过扩展InSAR干涉相位的模糊度区间,突破了单基线解缠的相位连续性限制。然而,相位噪声始终困扰着多基线解缠,聚类分析算法能够在一定程度上抑制噪声,但聚类簇边界的相位连续性难以保障。针对该问题,本文提出了一种离散优化多基线InSAR抗噪相位解缠方法,该方法将经典的多基线解缠模型转化为离散优化问题,构建了多基线解缠解析框架。本文方法以双向遍历的形式求解相位模糊度,针对相位噪声引起的模糊度个数突变问题,采用分块聚类的策略予以校正,提高了算法的抗噪稳健性,解决了聚类簇边界跳变问题。本文基于模拟数据集及实测数据集验证了本文方法的有效性。结果表明,本文方法相对于传统聚类方法,均方根误差减少了约20%。

关键词: 多基线, InSAR相位解缠, 离散优化, 聚类分析, 相位连续性假设

Abstract: Multi-baseline phase unwrapping breaks through the limit of phase continuity assumption through extending the ambiguity boundary of single-baseline phase unwrapping. However, phase noise is still challenging the multi-baseline unwrapping. The clustering analysis algorithm can suppress the noise to a certain extent, but it is hard to guarantee continuity of cluster edges. In this paper, a discrete-optimization-based multi-baseline InSAR phase unwrapping algorithm is proposed, which transforms the classical multi-baseline unwrapping into a discrete optimization problem and constructs a multi-baseline unwrapping analytical framework. The method solves the phase ambiguity in the bidirectional form, and introduces block clustering to correct the abrupt change of the phase ambiguities caused by heavy noise, improving the robustness of the algorithm and overcoming the cluster boundary hopping. The effectiveness of the method has been validated through simulation and real data tests. The results show that the proposed algorithm reduces the root mean square error by about 20% compared with the traditional clustering method.

Key words: multi-baseline, InSAR phase unwrapping, discrete optimization, cluster analysis, phase continuity assumption

中图分类号:

P237

岳佳伟, 黄其欢, 刘辉, 马张烽. 离散优化框架下的多基线InSAR相位解缠方法[J]. 测绘学报, 2024, 53(3): 473-481.

YUE Jiawei, HUANG Qihuan, LIU Hui, MA Zhangfeng. A multi-baseline phase unwrapping method based on a discrete optimization framework[J]. Acta Geodaetica et Cartographica Sinica, 2024, 53(3): 473-481.

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离散优化框架下的多基线InSAR相位解缠方法

A multi-baseline phase unwrapping method based on a discrete optimization framework

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