Results 241 to 250 of about 4,476,448 (287)

Instantaneous Frequency Estimation Using the ${\rm S}$-Transform

IEEE Signal Processing Letters, 2008
Instantaneous frequency (IF) is a fundamental concept that can be found in many disciplines such as communications, speech, and music processing. In this letter, analysis of an IF estimator, based on a time-frequency technique known as S-transform, is performed.
Jin Jiang, Miloš Dakovic, Ljubisa Stanković   +2 more
exaly   +2 more sources

An adaptive Generalized S-transform for instantaneous frequency estimation

Signal Processing, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lin Wang, Xiaofeng Meng 0002
exaly   +3 more sources

2-D phase unwrapping and instantaneous frequency estimation

IEEE Transactions on Geoscience and Remote Sensing, 1995
The phase of complex signals is wrapped since it can only be measured modulo-2/spl pi/; unwrapping searches for the 2/spl pi/-combinations that minimize the discontinuity of the unwrapped phase, as only the unwrapped phase can be analyzed and interpreted by further processing.
Spagnolini, Umberto
openaire   +3 more sources

Use of the cross Wigner-Ville distribution for estimation of instantaneous frequency [PDF]

IEEE Transactions on Signal Processing, 1993
This correspondence presents an iterative instantaneous frequency (IF) estimation scheme in which successive IF estimates are obtained from the peak of the cross Wigner-Ville distribution (XWVD) using a reference signal synthesized from an initial IF ...
Boualem Boashash, P O'Shea
exaly   +2 more sources

Algorithms for estimating instantaneous frequency

Signal Processing, 2004
Three algorithms to estimate instantaneous frequency of a frequency-modulated signal is discussed. These algorithms are based on Hilbert transform, Haar wavelet, and generalized pencil of function (GPOF) methods. While GPOF-based frequency detection method appears to be least sensitive to noise, wavelet-based method is easiest to implement.
Jaideva C. Goswami, Albert E. Hoefel
openaire   +1 more source

Ultra-wideband instantaneous frequency estimation

IEEE Instrumentation & Measurement Magazine, 2015
Determining the instantaneous frequency of a signal is required for many applications ranging from radio astronomy to defense applications. Unfortunately, the scan rate is often too long over a wideband spectrum compared to the time scale of signals of interest.
Daniel Lam, Brandon Buckley, Cejo K. Lonappan, Asad M. Madni, Bahram Jalali   +4 more
openaire   +2 more sources

On the use of the warblet transform for instantaneous frequency estimation

IEEE Transactions on Instrumentation and Measurement, 2004
A new digital signal-processing method for instantaneous frequency estimation is here proposed. The attention is mainly paid to signals whose instantaneous frequency trajectories exhibit a periodic evolution versus time. Thanks to an optimized use of the warblet transform, the method assures superior accuracy and resolving capability with respect to ...
Leopoldo Angrisani, Mauro D'Arco, Rosario Schiano Lo Moriello, Michele Vadursi   +3 more
openaire   +4 more sources

The statistical performance of some instantaneous frequency estimators

IEEE Transactions on Signal Processing, 1992
We examine the class of smoothed central finite differences (SCFD) instantaneous frequency (IF) estimators which are based on finite differencing of the phase of the analytic signal. These estimators are of particular interest since they are closely related to IF estimation via (periodic) first moment , with respect to frequency, of discrete time ...
Brian C. Lovell, Robert C. Williamson
openaire   +5 more sources

Bayesian estimation of instantaneous frequency

Proceedings of Third International Symposium on Time-Frequency and Time-Scale Analysis (TFTS-96), 2002
The problem addressed in this paper is the Bayesian estimation of the instantaneous frequency for parametric nonstationary processes. We carry out Bayesian inference on the unknown parameters using powerful stochastic algorithms, the Markov chain Monte Carlo methods.
A. Doucet, P. Duvaut
openaire   +1 more source

Anisotropic Instantaneous Frequency Estimator

2019 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC), 2019
We present a novel transform, called anisotropic chirplet transform, for the time-frequency analysis of overlapping signals. This transform is motivated by a desire to characterize micro-Doppler signals from the continuous wave radars, especially a challenging topic for instantaneous frequency (IF) estimation in high noise environments.
Yongchun Miao, Haixin Sun, Junfeng Wang
openaire   +1 more source