Results 231 to 240 of about 20,190 (261)

Time-Frequency Methods for Multicomponents Signals

2007 International Symposium on Signals, Circuits and Systems, 2007
Instantaneous frequency (IF) is a very important parameter in a large number of applications. Generally, the IF is a non-linear function of time. For such cases the analysis of time-frequency content provides an efficient solution. This paper is a comparative study of the performances in IF estimation of the two time-frequency based methods ...
Marius Salagean, Ioan Nafornita
openaire   +1 more source

A Nonparametric Approach for Multicomponent AM–FM Signal Analysis

Circuits, Systems, and Signal Processing, 2020
In this paper, a novel method is presented to analyze the amplitude modulated and frequency modulated (AM–FM) multicomponent signals using a combination of the variational mode decomposition (VMD) and the discrete energy separation algorithm (DESA). In the presented method, firstly, a multicomponent signal is decomposed using VMD method applied in an ...
Abhay Upadhyay, Manish Sharma 0001, Ram Bilas Pachori, Rajeev Sharma   +3 more
openaire   +1 more source

Spectral-temporal decomposition of multicomponent signals

[1992] IEEE Sixth SP Workshop on Statistical Signal and Array Processing, 2003
The method is based on autoregressive modeling of the composite signal with an adaptive filter bank. An illustrative example is given for a speech signal. >
K.T. Assaleh, R.J. Mammone
openaire   +1 more source

Application of ARMA Modeling to Multicomponent Signals

IFAC Proceedings Volumes, 1985
Abstract This paper investigates the problem of estimating the parameters of a multicomponent signal observed in noise. The process is modeled las a special nonstationary autoregressive moving average (ARMA) process. The parameters of the multicomponent signal are determined from the spectral estimate of the ARMA model The spectral lines are closely ...
S.T. Nichols, M.R. Smith, M.J.E. Salami
openaire   +1 more source

Multicomponent signal detection: Tones in noise

Proceedings of Meetings on Acoustics, 2013
In order to predict the detectability of broadband acoustic signals, a model must include a means of integrating information across frequencies. There have been several previous studies measuring the detectability of multicomponent signals, but it is still not clear what the best model is when signal components are not equally detectable or equal in ...
Eric R. Thompson, Nandini Iyer, Brian D. Simpson   +2 more
openaire   +1 more source

Instantaneous frequency of mono and multicomponent signals

Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis (Cat. No.98TH8380), 2002
It has often been reported and is now well established that the traditional definition of instantaneous frequency (IF/sub t/) fails in the presence of multicomponent signals. New definitions of IF/sub t/ have been proposed, in an attempt to cope with the difficulties of the traditional one.
P.M. Oliveira, V. Barroso
openaire   +1 more source

On the Use of Time-Frequency Representation in Multicomponent Signal Separation

2006 IEEE International Conference on Multimedia and Expo, 2006
In this paper, we address the problem of separating unknown multi-component signals from their instantaneous mixtures. Using linear time-frequency (TF) representation of the mixtures along with vectors classification scheme provide us a simple and efficient technique to separate multicomponent signals. The proposed algorithm can handle monocomponent as
Braham Barkat, Farook Sattar, Karim Abed-Meraim   +2 more
openaire   +1 more source

IF Estimation of Multicomponent Nonstationary Signals Based on AFSST

Circuits, Systems, and Signal Processing, 2023
Li Jiang, Wenqing Shang, Shizhao Xiang, Yudong Jiao, Yanni Wang, Junni Zhou   +5 more
openaire   +1 more source

Detection of Multicomponent Auditory Signals in Noise

The Journal of the Acoustical Society of America, 1957
How can the detection of a multicomponent signal be predicted if the detection of each single component of the complex signal is known? In the detection of a single sinusoidal signal, Fletcher's critical-band hypothesis asserts that all but a narrow band of frequencies near the signal to be detected may be ignored.
openaire   +1 more source

Identification of the parameters of a multicomponent signal class

Proceedings of the IEEE, 1978
Cohn-Sfetcu et al., in the multicomponent signal analysis decaying with time, generalized a method initially used for multi-component exponential decays. This letter presents an extension of this method to multicomponent signals of different asymptotic behavior.
openaire   +1 more source