Results 11 to 20 of about 21,697 (259)

Widely Linear Adaptive Instantaneous Frequency Estimation in Vector Hydrophones [PDF]

Sensors, 2018
To solve the problem that the time-frequency resolution of Short-Time Fourier Transform (STFT) is constrained by the window length and the moving step of the short time window, and to utilize the merits of a widely linear method, a novel instantaneous ...
Panpan Peng, Liang An
doaj   +2 more sources

High-Concentration Time-Frequency Representation and Instantaneous Frequency Estimation of Frequency-Crossing Signals [PDF]

Sensors
Frequency-crossing signals are widely found in nature and various engineering systems. Currently, achieving high-resolution time-frequency (TF) representation and accurate instantaneous frequency (IF) estimation for these signals presents a challenge and
Hui Li, Xiangxiang Zhu, Yingfei Wang, Xinpeng Cai, Zhuosheng Zhang   +4 more
doaj   +2 more sources

Parameterized Instantaneous Frequency Estimation Method for Vibration Signal with Nonlinear Frequency Modulation

Machines, 2022
The vibration signal from the rotatory machinery condition monitoring under time-varying speed is usually amplitude-modulated (AM) and frequency-modulated (FM).
Yuexin Huang, Qiukun Zhang, Jianfeng Zhong, Zhixiong Chen, Shuncong Zhong   +4 more
doaj   +1 more source

A combined kernel-based fuzzy C-means clustering and spectral centroid for instantaneous frequency estimation

Advances in Mechanical Engineering, 2020
An improved instantaneous frequency estimation algorithm for rotating machines based on a kernel-based fuzzy C-means clustering (KFCM) algorithm used in association with a spectral centroid algorithm is proposed in this study. The clustering algorithm is
Zhai Hua, Mao Hong-min, Wang Dong, Lu Xue-song, Ding Xu   +4 more
doaj   +1 more source

Probabilistic Estimation of Instantaneous Frequencies of Chirp Signals

IEEE Transactions on Signal Processing, 2023
Accepted for publication in IEEE Transactions on Signal ...
Sarkka, Simo, Sjolund, Jens, Schon, Thomas, B., Zhao, Zheng   +4 more
openaire   +3 more sources

Kernel estimation of the instantaneous frequency [PDF]

IEEE Transactions on Signal Processing, 1994
We consider kernel estimators of the instantaneous frequency of a slowly evolving sinusoid in white noise. The expected estimation error consists of two terms. The systematic bias error grows as the kernel halfwidth increases while the random error decreases.
openaire   +2 more sources

Instantaneous Frequency-Embedded Synchrosqueezing Transform for Signal Separation

Frontiers in Applied Mathematics and Statistics, 2022
The synchrosqueezing transform (SST) and its variants have been developed recently as an alternative to the empirical mode decomposition scheme to model a non-stationary signal as a superposition of amplitude- and frequency-modulated Fourier-like ...
Qingtang Jiang, Ashley Prater-Bennette, Bruce W. Suter, Abdelbaset Zeyani   +3 more
doaj   +1 more source

High-Precision and High-Resolution Synchrosqueezing Transform via Time-Frequency Instantaneous Phases

Applied Sciences, 2021
Synchrosqueezing transform (SST) can effectively improve time-frequency precision and resolution by squeezing time-frequency spectra via instantaneous frequencies, and it has been applied in many diverse disciplines; however, the precision of estimated ...
Yong Li, Gulan Zhang
doaj   +1 more source

Instantaneous Frequency Estimation and Localization

, 2016
In many applications, a critical feature of a nonstationary signal is provided by its instantaneous frequency (IF), which accounts for the signal spectral variations as a function of time. This chapter presents methods and algorithms for the localization and estimation of the signal IF using timefrequency (t, f) based methods.
El-Jaroudi, A., Emresoy, M.K., Stanković, L.J., Hussain, Z.M., Boashash, B., O'Shea, P.J., Barkat, B., Sucic, V., Lerga, J., Rankine, L.J., Djurović, I., Simeunović, M., Djukanović, S., Ristic, B.   +13 more
openaire   +4 more sources

Mechanical varying non-stationary signal separation method based on instantaneous frequency estimation

Advances in Mechanical Engineering, 2023
Mechanical equipment often works on variable speed condition, its corresponding vibration signal presents multi-component, modulation coupling with fast time-varying instantaneous frequency (IF), how to effectively compute IF and realize fasting varying ...
Lu Yan, Chen Qin-Xiao, Zhong Cheng, Tao Xian, Ding En-Jie, Liu Ke, Du Juan, Tong Xiao-Chun   +7 more
doaj   +1 more source