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Correlation over Decomposed Signals: A Non-Linear Approach to Fast and Effective Sequences Comparison [article]

Luciano da Fontoura Costa
2000 arXiv   pre-print
A novel non-linear approach to fast and effective comparison of sequences is presented, compared to the traditional cross-correlation operator, and illustrated with respect to DNA sequences.  ...  i.e.: Figure 1 - 1 (e) and (f) illustrates the effect of this strategy with respect to w = 1.5 and 4.5, respectively.Concluding Remarks:A novel non-linear fast and effective approach to the identification  ...  The Fast Fourier Transform and its Applications, Two original sequences (a-b), and the respective sequences obtained by applying the cross-correlation (c) and comparison (d) operators.  ... 
arXiv:cs/0006040v1 fatcat:a7uvcessvjdypgn5s4mzai2qfa

Adaptive Signal Processing Algorithms Based on EMD and ITD

Alexander Voznesensky, Dmitrii Kaplun
2019 IEEE Access  
due to their obvious advantages compared to conventional (e.g. correlation-or spectral-based analysis) approaches like the ability of their direct application to non-stationary signal analysis.  ...  We also demonstrate that the proposed algorithms modifications could be successfully utilized in a series of emerging applications for processing of non-stationary signals.  ...  Existing approaches to the non-stationary signal analysis and processing have several significant drawbacks.  ... 
doi:10.1109/access.2019.2956077 fatcat:gocl4qaw7rfl5emyrzxux57j7a

Surface Electromyography Signal Processing and Classification Techniques

Rubana Chowdhury, Mamun Reaz, Mohd Ali, Ashrif Bakar, Kalaivani Chellappan, Tae Chang
2013 Sensors  
However, noisy EMG signals are the major hurdles to be overcome in order to achieve improved performance in the above applications.  ...  This paper reviews two prominent areas; first: the pre-processing method for eliminating possible artifacts via appropriate preparation at the time of recording EMG signals, and second: a brief explanation  ...  Acknowledgments The author would like to thank and acknowledge the medical services of Teknologi Kasihatan dan Perubatan Research Group.  ... 
doi:10.3390/s130912431 pmid:24048337 pmcid:PMC3821366 fatcat:dpmex65sbfgsljq5edqn3qzmki

A Fast Multi-Step Atom Searching In Non-Low Signal Energy Regions For Matching Pursuits

Hideo Hashimoto, Kousuke Imamura
2008 Zenodo  
(Fig. 1 ) Matching pursuits is a greedy algorithm by which a signal is iteratively decomposed into a linear expansion of waveforms from an over-complete dictionary [4] .  ...  MATCHING PURSUITS Basic Principle Matching pursuits reconstructs a signal f (t) (an approximated version of f (t)) using a linear combination of basis function g γ (t) included in the over-complete dictionary  ... 
doi:10.5281/zenodo.40805 fatcat:2exczjfl4refrjg242nvgegedi

Spontaneous Pupillary Oscillation Signal Analysis Applying Hilbert Huang Transform

Fabiola M. Villalobos-Castaldi, José Ruiz-Pinales, Nicolás C. Kemper-Valverde, Mercedes Flores-Flores, Laura G. Ramírez-Sánchez, Metztli G. Ortiz-Hernández
2016 Proceedings of the 9th International Joint Conference on Biomedical Engineering Systems and Technologies  
The traditional Fourier transform is only useful for linear stationary signals analysis, but the HHT was designed for the analysis of non-linear and non-stationary signals.  ...  However, the HHT is a more suitable tool to study SPO signals which are fundamentally nonstationary.  ...  The EMD was implemented to decompose the original SPO signals; the obtained IMF modes varying from 4-10 plus a non-linear trend which also showed a clear non-stationary behavior.  ... 
doi:10.5220/0005697400670077 dblp:conf/biostec/Villalobos-Castaldi16 fatcat:plqep5ungzelzlv3y2oyo3zi2y

Self-Similar Decomposition of Digital Signals

Kiril M. Alexiev, Teodor G. Toshkov, Dimiter P. Prodanov
2020 Cybernetics and Information Technologies  
These signal representations discover different signal characteristics and in many cases, the exploration of a single signal presentation is not sufficient.  ...  Unlike some well-known approaches, the newly proposed method for signal decomposition and description does not use pre-selected templates such as sine waves, wavelets, etc.  ...  The approach is particularly effective when applied to repetitive signals of artificial origin like digital ones.  ... 
doi:10.2478/cait-2020-0038 fatcat:jww2qt66efdajge3zhex7nunk4

Auditory-inspired sparse representation of audio signals

Ramin Pichevar, Hossein Najaf-Zadeh, Louis Thibault, Hassan Lahdili
2011 Speech Communication  
The approach is applied to different audio signals and results are discussed and compared. This work is a first step towards the design of a high-quality auditory-inspired "object-based" audio coder.  ...  We show that the introduction of adaptiveness in the selection of gammachirp kernels enhances the compression rate compared to the case where the kernels are non-adaptive.  ...  The first author would also like to thank Jean Rouat for fruitful discussions on machine learning, as well as the University of Sherbrooke for a travel grant that made the discussions on machine learning  ... 
doi:10.1016/j.specom.2010.09.008 fatcat:ggfyamasqbbz5gp5k5g6ugbs3m

Enhanced Empirical Mode DecompositionApproach toEliminateMotion Artifacts in EEG using ICA and DWT

Vandana Roy, Shailja Shukla
2013 International Journal of Signal Processing, Image Processing and Pattern Recognition  
To ease the concept of diagnosing human health a strong and viable biomedical signal is of importance.  ...  approach to remove the artifacts of single channel signal is described followed by filtering mechanism using ICA and DSNR, Lambda (λ), Autocorrelation and PSD.  ...  The EEMD decomposes a single channel EEG to a multi-channel function and sourced to fast ICA algorithm for filtering.  ... 
doi:10.14257/ijsip.2016.9.5.29 fatcat:owywl3jtnnearo2zv4knlacfzi

Wavelet analysis of bender element signals

2012 Geotechnique  
The wavelet approach is not affected by near field effects and instead is characterised by a relatively consistent singularity related to the shear wave arrival time, across a range of frequencies and  ...  Examples of the use of the approach on typical synthetic and experimental bender element signals are also supplied, and these results are compared to those from other time and frequency domain approaches  ...  ACKNOWLEDGEMENTS The authors would like to thank Pierse Construction for their funding of the second author.  ... 
doi:10.1680/geot.9.p.052 fatcat:r7pnd6sglzcc5cojkbrxhd3vha

A Journey from Improper Gaussian Signaling to Asymmetric Signaling

Sidrah Javed, Osama Amin, Basem Shihada, Mohamed-Slim Alouini
2020 IEEE Communications Surveys and Tutorials  
The deviation of continuous and discrete complex random variables from the traditional proper and symmetric assumption to a generalized improper and asymmetric characterization (accounting correlation  ...  The journey begins from the design of improper Gaussian signaling in the interference-limited communications and leads to a more elaborate and practically feasible asymmetric discrete modulation design  ...  sequences stationary non-Gaussian vector sequence [182] Stationary non-Gaussian signal with improper/colored noise [62] Spectral image 2D-spectrum Stationary non-Gaussian image with improper Gaussian  ... 
doi:10.1109/comst.2020.2989626 fatcat:zyno7ku6n5eqnp6rrcopczb4qu

Audio Signal Processing Using Time-Frequency Approaches: Coding, Classification, Fingerprinting, and Watermarking

K Umapathy, B Ghoraani, S Krishnan
2010 EURASIP Journal on Advances in Signal Processing  
Due to its non-stationary nature, time-or frequency-only approaches are inadequate in analyzing these signals.  ...  A joint time-frequency (TF) approach would be a better choice to efficiently process these signals.  ...  Acknowledgments Portions of this paper reprinted, with permission, from [39, 69, 71] [25] , others are reproduced from the book chapter mentioned in [26] , and finally portions are reproduced from  ... 
doi:10.1155/2010/451695 fatcat:u2smg3zf7fedne5e5ankvmepee

Parameterized source separation for delayed spectroscopic signals

Hassan Mortada, Vincent Mazet, Charles Soussen, Christophe Collet, Lionel Poisson
2019 Signal Processing  
Results on synthetic and real data demonstrate the effectiveness of both algorithms compared to state-of-the-art methods for highly correlated Gaussian waveforms.  ...  For highly correlated sources, the separation becomes ambiguous, and a second algorithm is proposed: a regularization term is added to favor slow delay evolution within each source.  ...  the knowledge of parametrized source shapes for decomposing a sequence of spectra.  ... 
doi:10.1016/j.sigpro.2018.12.015 fatcat:xbeaiikpizc3bnlbcesidt746a

Signal processing with higher-order spectra

C.L. Nikias, J.M. Mendel
1993 IEEE Signal Processing Magazine  
Nikias and A. P. Petropulu, Higher-Order Spectral Analysis, Oppenheim Series of Signal Processing, Prentice-Hall, Inc. 1993, as well as the tutorials by C. L. Nikias  ...  In fact, a signal is said to be a linear non-Gaussian process of order n if the magnitude of the nth-order coherency, 1 C(w1, . . ., mfl-l) 1, is constant over all frequencies; otherwise, the signal is  ...  The signal of interest is assumed to be non-Gaussian whereas the additive noise is Gaussian and spatially correlated.  ... 
doi:10.1109/79.221324 fatcat:27qqvapr3fcpbofyh4vyiffeji

Secure Transfer of Color Images Using Horizontal and Vertical Scan

Berrak Oulaya, Belmeguenai Aissa, Ouchtati Salim
2019 Traitement du signal  
The proposed technique is simple to implement and has high encryption rate.  ...  The aim of this contribution is to enhance the security of encrypted image and decrease the execution time.  ...  The generator is a stream cipher system that consists of seventeen non linear feedback shift registers (NLFSR) denoted of lengths ,where 1 ≤ ≤ 17, and a non linear combining function of 17 variables.  ... 
doi:10.18280/ts.360106 fatcat:wmiqqmddqff3bnjc6btq534x6a

Time Integrating Optical Signal Processing

P. Kellman
1980 Optical Engineering: The Journal of SPIE  
Coherent and non-coherent time integrating schemes were considered and a new hybrid space/time integrating approach was detailed.  ...  These have been analyzed to establish their capabilities with respect to each other and in comparison with an acousto-optic (non-interferometric) power spectrum analyzer (which we will call a Bragg receiver  ...  Also, a variety of simple optical systems, both coherent and noncoherent, can be implemented to measure cross-correlation functions between two signals.  ... 
doi:10.1117/12.7972521 fatcat:lrjt3dvlyvabziw2625ndvnkoq
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