Acta Geodaetica et Cartographica Sinica ›› 2017, Vol. 46 ›› Issue (12): 1998-2005.doi: 10.11947/j.AGCS.2017.20160665

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A Fresh Phase Unwrapping Method Based on Modified Embedded Cubature Kalman Filter

DAI Gaoxing, XIE Xianming   

  1. School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China
  • Received:2016-12-26 Revised:2017-07-19 Online:2017-12-20 Published:2017-12-28
  • Supported by:
    The National Natural Science Foundation of China(Nos. 41661092 61461011) The State Key Program of National Natural Science of Guangxi Zhuang Autonomous Region (No. 2016GXNSFDA380009) The Natural Science Foundation of Guangxi Zhuang Autonomous Region (No. 2014GXNSFBA118273) The Guangxi Wireless Broad Band Communication and Signal Processing Key Laboratory 2014/2015 Director Fund Project (No. GXKL061503) 2017 Postgraduate Research and Innovation Project of Guilin University of Electronic Technology(No. 2017YJCX23)

Abstract: A phase unwrapping algorithm is proposed that based on modified embedded cubature Kalman filter for interferometric fringes.The algorithm is the result through combining an embedded cubature Kalman filter modified by a Levenberg-Marquardt method,a robust phase gradient estimator based on amended matrix pencil model,and a quantization path-following strategy.This method can accurately estimate unambiguous unwrapped phase of interferometric fringes by applying the modified embedded cubature Kalman filter to perform phase unwrapping and noise suppress simultaneously along the path routed by the quantization path-following strategy,which is beneficial to simplify the complexity and the difficulty of pre-filtering procedure followed by phase unwrapping procedure,and even can remove the pre-filtering procedure.Results obtained with synthetic data and real data show more acceptable solutions with the proposed method,compared with some of the most used algorithms.

Key words: phase unwrapping, modified embedded cubature Kalman filter, Levenberg-Marquardt method, quantization path-following strategy

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