Compensation method for signal drift induced by time delay difference in phase retrieval algorithm for distributed fiber interferometry using asymmetric 3 × 3 coupler
Sign Up to like & getrecommendations! Published in 2019 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.32161
Abstract: Phase retrieval algorithm is an important part of optic‐fiber interferometry system. In this article, drift of the retrieved signal caused by the time delay difference between two interference signals from asymmetric 3 × 3 coupler is theoretically… read more here.
Keywords: drift; delay difference; algorithm; time delay ... See more keywords
Delay‐difference approximations of PD‐controllers. Improperly‐posed systems in multiple delays case
Sign Up to like & getrecommendations! Published in 2024 at "International Journal of Robust and Nonlinear Control"
DOI: 10.1002/rnc.7217
Abstract: In this paper, we study the behavior of characteristic roots of a class of strictly proper LTI SISO systems that are subject to a PD controller for which the derivative action has been implemented by… read more here.
Keywords: multiple delays; improperly posed; delay difference; difference approximations ... See more keywords
Passive Localization Based on Multipath Time-Delay Difference with Two Hydrophones in Deep Ocean
Sign Up to like & getrecommendations! Published in 2017 at "Acoustics Australia"
DOI: 10.1007/s40857-017-0084-9
Abstract: In this study, we propose a localization method based on multipath time-delay difference (MTD). We extract the time-delay difference of the direct and sea surface-reflected sound rays by the signal from hydrophones in deep sea… read more here.
Keywords: time delay; delay difference; localization;
To Filter or Not to Filter? Impact on Stability of Delay-Difference and Neutral Equations With Multiple Delays
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Transactions on Automatic Control"
DOI: 10.1109/tac.2022.3192327
Abstract: For control systems where the closed-loop system description is governed by linear delay-differential equations of neutral type, it is known that stability may be fragile, in the sense of sensitive to infinitesimal perturbations to parameters… read more here.
Keywords: delay difference; filter; difference neutral; stability ... See more keywords
Path Identification in Passive Acoustic Tomography via Time Delay Difference Comparison and Accumulation Analysis
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Marine Science and Engineering"
DOI: 10.3390/jmse13101996
Abstract: Empirical green’s functions (EGFs) can be extracted from the cross-correlation of ambient ocean noise and serve as the foundation for passive ocean acoustic tomography (POAT). A critical challenge in POAT is the accurate identification of… read more here.
Keywords: path identification; delay difference; time delay; time ... See more keywords