Proceedings ArticleDOI
Signal Representation Using Ramanujan Subspaces Utilizing A Prior Signal Information
Shaik Basheeruddin Shah,Vijay Kumar Chakka +1 more
- pp 1-5
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TLDR
This paper proposes a new signal representation to estimate the period and frequency information of a given signal with low computational complexity by representing a finite-length discrete-time signal as a linear combination of signals belongs to Ramanujan subspaces.Abstract:
In signal processing applications the information about the signal such as frequency (or) period is known a prior for most of the practical signals like ECG, EEG, speech, etc. Inspired by this, in this paper, we propose a new signal representation to estimate the period and frequency information of a given signal with low computational complexity. We achieve this by representing a finite-length discrete-time signal as a linear combination of signals belongs to Ramanujan subspaces. Further, we evaluate the performance of the proposed representation with a simulated example and also by addressing the problem of reducing Power Line Interference (PLI) in an ECG signal. Finally, for a given integer-valued signal, we show that the computational complexity of the proposed transform is quite low in comparison with the existing transforms, and it is quite comparable for a given real (or) complex-valued signal.read more
References
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PhysioBank, PhysioToolkit, and PhysioNet: components of a new research resource for complex physiologic signals.
Ary L. Goldberger,Luís A. Nunes Amaral,Leon Glass,Jeffrey M. Hausdorff,Plamen Ch. Ivanov,Roger G. Mark,Joseph E. Mietus,George B. Moody,Chung-Kang Peng,H. Eugene Stanley +9 more
TL;DR: The newly inaugurated Research Resource for Complex Physiologic Signals (RRSPS) as mentioned in this paper was created under the auspices of the National Center for Research Resources (NCR Resources).
Book
Discrete-Time Signal Processing
TL;DR: In this paper, the authors provide a thorough treatment of the fundamental theorems and properties of discrete-time linear systems, filtering, sampling, and discrete time Fourier analysis.
Journal ArticleDOI
Ramanujan Sums in the Context of Signal Processing—Part I: Fundamentals
TL;DR: In the companion paper (Part II), it is shown that arbitrary finite duration signals can be decomposed into a finite sum of orthogonal projections onto Ramanujan subspaces.
Journal ArticleDOI
Use of temporal information: detection of periodicity, aperiodicity, and pitch in speech
TL;DR: A time domain aperiodicity, periodicity, and pitch (APP) detector that estimates the proportion of periodic and aperiodic energy in a speech signal and the pitch period of the periodic component shows excellent agreement between the periodic/aperiodic decisions made by the APP system and the estimates obtained from the EGG data.
Journal ArticleDOI
Ramanujan Sums in the Context of Signal Processing—Part II: FIR Representations and Applications
TL;DR: The traditional way to solve for the expansion coefficients in the Ramanujan-sum expansion does not work in the FIR case, and theRamanujan Periodic Transform (RPT) is defined based on this, and is useful to identify hidden periodicities.