We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Time delay estimation based on variational mode decomposition.
- Authors
Jing-Yi Lu; Dong Ye; Wen-Ping Ma
- Abstract
In order to improve the time delay estimation of colored noise signals, this article proposes generalized crosscorrelation time delay estimation based on variational mode decomposition. First of all, we put forward the signal energy detection criterion to extract the effective signal from the signal, which can reduce the amount of calculation and improve the real-time performance. Second, the effective signal is decomposed into a number of intrinsic mode functions using variational mode decomposition. The correlation coefficients of each intrinsic mode function and the original signal are calculated. The article reconstructed signal with intrinsic mode functions which extract useful intrinsic mode functions by defaulting the correlation coefficient threshold. Finally, this article uses generalized cross-correlation to estimate time delay of the reconstructed signal. Theoretical analysis and simulation results show that the accurate time delay estimation can be obtained under the condition of color noise by the proposed method. The measurement accuracy of the proposed method is 15 times that of the generalized cross-correlation, and the running time of the proposed method is 4.0601 times faster than that of the generalized cross-correlation algorithm. The proposed method can reduce the computation and the running time of the system and also improve the measurement accuracy.
- Subjects
TIME delay estimation; CHEMICAL decomposition; REAL-time control; ALGORITHMS; GENERALIZATION
- Publication
Advances in Mechanical Engineering (Sage Publications Inc.), 2017, Vol 9, Issue 1, p1
- ISSN
1687-8132
- Publication type
Article
- DOI
10.1177/1687814016688587