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

• Main Authors: DAI Gaoxing, XIE Xianming
• Format: Article
• Language: zho
• Published: Surveying and Mapping Press 2017-12-01
• Series: Acta Geodaetica et Cartographica Sinica
• Subjects: phase unwrapping; modified embedded cubature Kalman filter; Levenberg-Marquardt method; quantization path-following strategy
• Online Access: http://html.rhhz.net/CHXB/html/2017-12-1998.htm

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.