کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6958423 1451942 2016 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Variational mode decomposition denoising combined the detrended fluctuation analysis
ترجمه فارسی عنوان
تجزیه حالت متغیری تجزیه و تحلیل نوسانات پیچیده را ترکیب می کند
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
چکیده انگلیسی
A novel signal denoising method that combines variational mode decomposition (VMD) and detrended fluctuation analysis (DFA), named DFA-VMD, is proposed in this paper. VMD is a recently introduced technique for adaptive signal decomposition, which is theoretically well founded and more robust to sampling and noise compared with empirical mode decomposition (EMD). The noisy signal is first broken down into a given number K band-limited intrinsic mode functions (BLIMFs) by VMD. Then a simple criterion based on DFA is designed to select the number K, aiming to avoid the impact of overbinning or underbinning on the VMD denoising. In addition, DFA is also developed to define the relevant modes to construct the filtered signal. After that, the computational complexity of DFA-VMD denoising is analyzed, and its time complexity is equivalent to the EMD. Experimental results, on simulated and real signals, show the superior performance of this proposed filtering over EMD-based denoisings and discrete wavelet threshold filtering.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Signal Processing - Volume 125, August 2016, Pages 349-364
نویسندگان
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