Maximum Likelihood Estimation of Clock Skew in IEEE 1588 with Fractional Gaussian Noise
Joint Authors
Source
Mathematical Problems in Engineering
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-24, 24 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-04-01
Country of Publication
Egypt
No. of Pages
24
Main Subjects
Abstract EN
To support system-wide synchronization accuracy and precision in the sub-microsecond range without using GPS technique, the precise time protocol (PTP) standard IEEE-1588 v2 is chosen.
Recently, a new clock skew estimation technique was proposed for the slave based on a dual slave clock method that assumes that the packet delay variation (PDV) in the Ethernet network is a constant delay.
However, papers dealing with the Ethernet network have shown that this PDV is a long range dependency (LRD) process which may be modeled as a fractional Gaussian noise (fGn) with Hurst exponent ( H ) in the range of 0.5 < H < 1 .
In this paper, we propose a new clock skew estimator based on the maximum likelihood (ML) technique and derive an approximated expression for the Cramer-Rao lower bound (CRLB) both valid for the case where the PDV is modeled as fGn ( 0.5 < H < 1 ).
Simulation results indicate that our new clock skew method outperforms the dual slave clock approach and that the simulated mean square error (MSE) obtained by our new proposed clock skew estimator approaches asymptotically the developed CRLB.
American Psychological Association (APA)
Levy, Chagai& Pinchas, Monika. 2015. Maximum Likelihood Estimation of Clock Skew in IEEE 1588 with Fractional Gaussian Noise. Mathematical Problems in Engineering،Vol. 2015, no. 2015, pp.1-24.
https://search.emarefa.net/detail/BIM-1073115
Modern Language Association (MLA)
Levy, Chagai& Pinchas, Monika. Maximum Likelihood Estimation of Clock Skew in IEEE 1588 with Fractional Gaussian Noise. Mathematical Problems in Engineering No. 2015 (2015), pp.1-24.
https://search.emarefa.net/detail/BIM-1073115
American Medical Association (AMA)
Levy, Chagai& Pinchas, Monika. Maximum Likelihood Estimation of Clock Skew in IEEE 1588 with Fractional Gaussian Noise. Mathematical Problems in Engineering. 2015. Vol. 2015, no. 2015, pp.1-24.
https://search.emarefa.net/detail/BIM-1073115
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1073115