Results 41 to 50 of about 234,598 (330)
IF Estimation Using Spectrogram and Scalogram [PDF]
Journal of Electrical and Electronics Engineering, 2013 This paper presents the results obtained using an instantaneous frequency estimation method, based upon the detection of the peaks of the spectrogram and the scalogram.
REIZ Romulus, MORGOŞ Lucian
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Adaptive Window Zero-Crossing-Based Instantaneous Frequency Estimation
EURASIP Journal on Advances in Signal Processing, 2004 We address the problem of estimating instantaneous frequency (IF) of a real-valued constant amplitude time-varying sinusoid. Estimation of polynomial IF is formulated using the zero-crossings of the signal.
Sekhar S Chandra, Sreenivas TV
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Over-the-Air Synchronization of Time, Phase and Frequency in a Distributed Receiving System
IEEE Access, 2023 This paper addresses over-the-air synchronization of two distributed receivers connected to a fusion center via digital links. We distinguish between received signals’ synchronization and receiving channels’ synchronization.
Milos Janjic +3 more
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A real-time time-frequency based instantaneous frequency estimator [PDF]
Signal Processing, 2013 Commonly used time-frequency representations, like the short-time Fourier transform, the Wigner distribution and the higher order polynomial distributions, estimate the instantaneous frequency at the middle of the time-interval used in the analysis. For real time applications, like for example in radar signal processing, where the target parameters are
Ljubisa Stankovic +2 more
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, 2001 In this paper an instantaneous frequency estimator (IFE) of a discrete-time base band complex signal is considered. The IFE is built around one-band, maximally flat linear-phase FIR filters, which are used for differentiating and delaying Cartesian ...
Cain, G.D. +3 more
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, 2002 An adaptive approach to the estimation of the instantaneous frequency (IF) of nonstationary mono- and multicomponent FM signals with additive Gaussian noise is presented. The IF estimation is based on the fact that quadratic time-frequency distributions (
Boashash, Boualem +3 more
core +1 more source
Remote Sensing, 2021 The shift in IF (instantaneous frequency) series and the corresponding relaxation time have the potential to characterize sediment properties. However, these attributes derived from SBP (sub-bottom profiler) data are seldom used for offshore site ...
Shaobo Li +3 more
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FEBS Open Bio, EarlyView.Activation of the mitochondrial protein OXR1 increases pSyn129 αSynuclein aggregation by lowering ATP levels and altering mitochondrial membrane potential, particularly in response to MSA‐derived fibrils. In contrast, ablation of the ER protein EMC4 enhances autophagic flux and lysosomal clearance, broadly reducing α‐synuclein aggregates.
Sandesh Neupane +11 more
wiley +1 more source
INSTANTANEOUS FREQUENCY ESTIMATION USING A LEAST SQUARES TIME-FREQUENCY METHOD
Electrica, 2004 We present a method for estimating the instantaneous frequency of a signal. This method involves the calculation of a time-frequency energy density of the signal, then obtaining an instantaneous frequency estimation from this joint density.
Mahmut ÖZTÜRK, Aydın AKAN
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Statistical/computational comparison of some estimators for instantaneous frequency [PDF]
[Proceedings] ICASSP 91: 1991 International Conference on Acoustics, Speech, and Signal Processing, 1991 Some algorithms for estimating the instantaneous frequency of a constant-amplitude phase-modulated signal are reviewed and compared in terms of computational and statistical efficiency. Each of the algorithms is briefly described. The computational requirements for each algorithm are presented in tabular form, and the variance of each estimator ...
Boashash, B, Oshea, P, Ristic, B
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