IEEE Access, 2020 The fault vibration signal of rotating machinery system under strong background noise has the characteristics of non-stationary, non-Gaussian and complex components.
Yanfeng Li, Zhennan Han, Zhijian Wang
doaj +1 more source
Entropy, 2022 Instantaneous frequency in multi-sensor recordings is an important parameter for estimation of direction of arrival estimation, source separation, and sparse reconstruction.
Nabeel Ali Khan, Sadiq Ali, Kwonhue Choi
doaj +1 more source
Signal-adaptive evolutionary spectral analysis using instantaneous frequency estimation [PDF]
, 2021 In this paper we present a signal-adaptive evolutionary spectrum estimation method based on the discrete evolutionary transform (DET). The DET provides a representation for non-stationary signals and a time-frequency kernel that permits us to obtain the ...
Akan, AYDIN
core +1 more source
On an instantaneous frequency estimator with FIR filters having maximally flat frequency response error magnitude [PDF]
, 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
core +1 more source
Application of Local Histogram Clipping Equalization Image Enhancement in Bearing Fault Diagnosis
IEEE Access, 2022 Aiming at the problem that the time-frequency image of bearing fault characteristics is relatively weak and difficult to identify. This paper presents a time-frequency analysis method of local maximum synchrosqueezing transform based on image enhancement.
Zhiqiang Zeng +3 more
doaj +1 more source
Bivariate Instantaneous Frequency and Bandwidth [PDF]
IEEE Transactions on Signal Processing, 2010 The generalizations of instantaneous frequency and instantaneous bandwidth to a bivariate signal are derived. These are uniquely defined whether the signal is represented as a pair of real-valued signals, or as one analytic and one anti-analytic signal.
Jonathan M. Lilly, Sofia C. Olhede
openaire +2 more sources
An Improved Multi-Ridge Extraction Method Based on Differential Synchro-Squeezing Wavelet Transform
IEEE Access, 2021 It is very important to accurately extract the instantaneous frequency (IF) of complex non-stationary signals, so the signal processing methods based on IF are widely used in engineering.
Yanfeng Li +3 more
doaj +1 more source
Window Functions With Minimum-Sidelobe Derivatives for Computing Instantaneous Frequency
IEEE Access, 2022 In the field of nonstationary signal analysis and processing, the short-time Fourier transform (STFT) is frequently used to convert signals into the time-frequency domain.
Tsubasa Kusano +2 more
doaj +1 more source
Use of the Cross Wigner-Ville Distribution for Estimation of Instantaneous Frequency [PDF]
, 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 ...
Oshea, P +3 more
core +1 more source
Adaptive instantaneous frequency estimation of multicomponent FM signals using quadratic time-frequency distributions [PDF]
, 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