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Adaptive Complex Variational Mode Decomposition for Micro-Motion Signal Processing Applications

In order to suppress the strong clutter component and separate the effective fretting component from narrow-band radar echo, a method based on complex variational mode decomposition (CVMD) is proposed in this paper. The CVMD is extended from variational mode decomposition (VMD), which is a recently...

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Autores principales: Xia, Saiqiang, Yang, Jun, Cai, Wanyong, Zhang, Chaowei, Hua, Liangfa, Zhou, Zibo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7956541/
https://www.ncbi.nlm.nih.gov/pubmed/33652710
http://dx.doi.org/10.3390/s21051637
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author Xia, Saiqiang
Yang, Jun
Cai, Wanyong
Zhang, Chaowei
Hua, Liangfa
Zhou, Zibo
author_facet Xia, Saiqiang
Yang, Jun
Cai, Wanyong
Zhang, Chaowei
Hua, Liangfa
Zhou, Zibo
author_sort Xia, Saiqiang
collection PubMed
description In order to suppress the strong clutter component and separate the effective fretting component from narrow-band radar echo, a method based on complex variational mode decomposition (CVMD) is proposed in this paper. The CVMD is extended from variational mode decomposition (VMD), which is a recently introduced technique for adaptive signal decomposition, limited to only dealing with the real signal. Thus, the VMD is extended from the real domain to the complex domain firstly. Then, the optimal effective order of singular value is obtained by singular value decomposition (SVD) to solve the problem of under-decomposition or over-decomposition caused by unreasonable choice of decomposition layer, it is more accurate than detrended fluctuation analysis (DFA) and empirical mode decomposition (EMD). Finally, the strongly correlated modes and weakly correlated modes are judged by calculating the Mahalanobis distance between the band-limited intrinsic mode functions (BLIMFs) and the original signal, which is more robust than the correlation judgment methods such as computing cross-correlation, Euclidean distance, Bhattachryya distance and Hausdorff distance. After the weak correlation modes are eliminated, the signal is reconstructed locally, and the separation of the micro-motion signal is realized. The experimental results show that the proposed method can filter out the strong clutter component and the fuselage component from radar echo more effectively than the local mean decomposition (LMD), empirical mode decomposition and moving target indicator (MTI) filter.
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spelling pubmed-79565412021-03-16 Adaptive Complex Variational Mode Decomposition for Micro-Motion Signal Processing Applications Xia, Saiqiang Yang, Jun Cai, Wanyong Zhang, Chaowei Hua, Liangfa Zhou, Zibo Sensors (Basel) Article In order to suppress the strong clutter component and separate the effective fretting component from narrow-band radar echo, a method based on complex variational mode decomposition (CVMD) is proposed in this paper. The CVMD is extended from variational mode decomposition (VMD), which is a recently introduced technique for adaptive signal decomposition, limited to only dealing with the real signal. Thus, the VMD is extended from the real domain to the complex domain firstly. Then, the optimal effective order of singular value is obtained by singular value decomposition (SVD) to solve the problem of under-decomposition or over-decomposition caused by unreasonable choice of decomposition layer, it is more accurate than detrended fluctuation analysis (DFA) and empirical mode decomposition (EMD). Finally, the strongly correlated modes and weakly correlated modes are judged by calculating the Mahalanobis distance between the band-limited intrinsic mode functions (BLIMFs) and the original signal, which is more robust than the correlation judgment methods such as computing cross-correlation, Euclidean distance, Bhattachryya distance and Hausdorff distance. After the weak correlation modes are eliminated, the signal is reconstructed locally, and the separation of the micro-motion signal is realized. The experimental results show that the proposed method can filter out the strong clutter component and the fuselage component from radar echo more effectively than the local mean decomposition (LMD), empirical mode decomposition and moving target indicator (MTI) filter. MDPI 2021-02-26 /pmc/articles/PMC7956541/ /pubmed/33652710 http://dx.doi.org/10.3390/s21051637 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xia, Saiqiang
Yang, Jun
Cai, Wanyong
Zhang, Chaowei
Hua, Liangfa
Zhou, Zibo
Adaptive Complex Variational Mode Decomposition for Micro-Motion Signal Processing Applications
title Adaptive Complex Variational Mode Decomposition for Micro-Motion Signal Processing Applications
title_full Adaptive Complex Variational Mode Decomposition for Micro-Motion Signal Processing Applications
title_fullStr Adaptive Complex Variational Mode Decomposition for Micro-Motion Signal Processing Applications
title_full_unstemmed Adaptive Complex Variational Mode Decomposition for Micro-Motion Signal Processing Applications
title_short Adaptive Complex Variational Mode Decomposition for Micro-Motion Signal Processing Applications
title_sort adaptive complex variational mode decomposition for micro-motion signal processing applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7956541/
https://www.ncbi.nlm.nih.gov/pubmed/33652710
http://dx.doi.org/10.3390/s21051637
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