NDLI: Phase Estimation of a Single Quasi-Periodic Signal

Content Provider	IEEE Xplore Digital Library
Author	Makihara, Y. Aqmar, M.R. Ngo Thanh Trung Nagahara, H. Sagawa, R. Mukaigawa, Y. Yagi, Y.
Copyright Year	1991
Abstract	We propose a method for phase estimation of a single non-parametric quasi-periodic signal. Assuming signal intensities should be equal among samples of the same phase, such corresponding samples are obtained by self-dynamic time warping between a quasi-periodic signal and a signal with multiple-period shifts applied. A phase sequence is then estimated in a sub-sampling order using an optimization framework incorporating 1) a data term derived from the correspondences and 2) a smoothness term of the local phase evolution under 3) a monotonic-increasing constraint on the phase. Such a phase estimation is, however, ill-posed because of combination ambiguity between the phase evolution and the normalized periodic signal, and hence can result in a biased solution. Therefore, we introduce into the optimization framework 4) a bias correction term, which imposes zero-bias from the linear phase evolution. Analysis of the quasi-periodic signals from both simulated and real data indicate the effectiveness and also potential applications of the proposed method.
Sponsorship	IEEE Signal Processing Society
Starting Page	2066
Ending Page	2079
Page Count	14
File Size	3496777
File Format	PDF
ISSN	1053587X
Volume Number	62
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase estimation Optimization Frequency modulation Frequency estimation Signal resolution Image sequences dynamic time warping Phase quasi-periodic signal
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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