Multicomponent AM-FM signals analysis based on EMD-B-splines ESA
Analyse des signaux AM-FM basée sur une version B-splines de l'EMD-ESA
Article dans une revue avec comité de lecture
Date
2012Journal
Signal ProcessingAbstract
In this paper a signal analysis framework for estimating time-varying amplitude and frequency functions of multicomponent amplitude and frequency modulated (AM–FM) signals is introduced. This framework is based on local and non-linear approaches, namely Energy Separation Algorithm (ESA) and Empirical Mode Decomposition (EMD). Conjunction of Discrete ESA (DESA) and EMD is called EMD–DESA. A new modified version of EMD where smoothing instead of an interpolation to construct the upper and lower envelopes of the signal is introduced. Since extracted IMFs are represented in terms of B-spline (BS) expansions, a closed formula of ESA robust against noise is used. Instantaneous Frequency (IF) and Instantaneous Amplitude (IA) estimates of a multi- component AM–FM signal, corrupted with additive white Gaussian noise of varying SNRs, are analyzed and results compared to ESA, DESA and Hilbert transform-based algorithms. SNR and MSE are used as figures of merit. Regularized BS version of EMD– ESA performs reasonably better in separating IA and IF components compared to the other methods from low to high SNR. Overall, obtained results illustrate the effective- ness of the proposed approach in terms of accuracy and robustness against noise to track IF and IA features of a multicomponent AM–FM signal.
Files in this item
- Name:
- IRENav_Signal_Processing_2012_ ...
- Size:
- 2.691Mb
- Format:
- Description:
- document article principal
Collections
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lectureBOUCHIKHI, Abdelkhalek; CEXUS, Jean-Christophe; CHONAVEL, Thierry; BOUDRAA, Abdel-Ouahab (Institute of Electrical and Electronics Engineers, 2014)A novel detection approach of linear FM (LFM) signals, with single or multiple components, in the time-frequency plane of Teager-Huang (TH) transform is presented. The detection scheme that combines TH transform and Hough ...
-
Communication avec acteDans cet article, nous présentons une stratégie de détection d’épilepsie à partir de signaux EEG (issus d’un seul capteur) basée sur l’algorithme de visibilité, qui consiste à transformer une série temporelle en un graphe ...
-
Article dans une revue avec comité de lectureIn this paper a new method for voiced speech enhancement combining the Empirical Mode Decomposition (EMD) and the Adaptive Center Weighted Average (ACWA) filter is introduced. Noisy signal is decomposed adaptively into ...
-
Article dans une revue avec comité de lectureThis work aims at introducing some energy operators linked to Teager-Kaiser energy operator and its associated higher order versions and expand them to multidimensional signals. These operators are very useful for analyzing ...
-
Article dans une revue avec comité de lecturePsi_B operator is an energy operator that measures the interactions between two complex signals. In this letter, new properties of Psi_B operator are presented. Connections between Psi_B operator and some time-frequency ...