测绘通报 ›› 2021, Vol. 0 ›› Issue (2): 40-43.doi: 10.13474/j.cnki.11-2246.2021.0040

• 学术研究 • 上一篇    下一篇

一种容积信息滤波局部迭代相位解缠方法

孙玉铮, 谢先明, 梁小星   

  1. 桂林电子科技大学信息与通信学院, 广西 桂林 541004
  • 收稿日期:2020-04-12 修回日期:2020-06-10 出版日期:2021-02-25 发布日期:2021-03-09
  • 作者简介:孙玉铮(1994-),男,硕士,主要研究方向为合成孔径雷达干涉测量。E-mail:814824985@qq.com
  • 基金资助:
    国家自然科学基金(41661092);广西自然科学基金(2018GXNSFAA281196);广西无线宽带通信与信号处理重点实验室基金(GXKL06180102)

A local iterative phase unwrapping method based on cubature information filter

SUN Yuzheng, XIE Xianming, LIANG Xiaoxing   

  1. School of Information and Communication Engineering, Guilin University of Electronic Technology, Guilin 541004, China
  • Received:2020-04-12 Revised:2020-06-10 Online:2021-02-25 Published:2021-03-09

摘要: 本文针对低信噪比干涉图相位解缠难题,提出了一种容积信息滤波局部迭代相位解缠方法。先采用基于修正矩阵束模型的局部相位梯度估计算法获取待解缠像元局部窗口相位梯度信息,通过引入堆排序的质量图指引相位解缠路径,再利用容积信息滤波算法在待解缠像元局部窗口内逐像元递推进行一维状态估计,直至遍历局部窗口内所有相邻像元,即可获得待解缠像元的状态估计,在保持解缠效率的同时提高了相位解缠精度。模拟和实测数据结果证明了本文算法的有效性。

关键词: 合成孔径雷达干涉测量, 相位解缠, 容积信息滤波, 状态估计, 质量图

Abstract: To solve the phase unwrapping problem of interferograms with low SNR, a local iterative phase unwrapping method based on cubature information filter is proposed. Firstly, a local phase gradient estimation algorithm based on amended matrix pencil model is used to obtain the phase gradient information in the local window centered at the pixel to be unwrapped. Then the phase unwrapped path is guided by introducing the quality map of the heap sort. And the cubature information filter is used to recursively perform one-dimensional state estimation operation. The state estimate of the pixel to be unwrapped is obtained until all neighbours in the local window of the pixel to be unwrapped are traversed. The phase unwrapping accuracy is improved while maintaining acceptable unwrapping efficiency. The simulation and measured data results prove the effectiveness of the algorithm in this paper.

Key words: InSAR, phase unwrapping, cubature information filtering, state estimation, quality map

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