Results 11 to 20 of about 436,878 (286)
Synchrosqueezing-based Recovery of Instantaneous Frequency from Nonuniform Samples
SIAM Journal on Mathematical Analysis, 2011 We propose a new approach for studying the notion of the instantaneous frequency of a signal. We build on ideas from the Synchrosqueezing theory of Daubechies, Lu and Wu and consider a variant of Synchrosqueezing, based on the short-time Fourier ...
Thakur, Gaurav, Wu, Hau-Tieng
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Sensors, 2020 It is proposed a novel instantaneous frequency estimation technology, multi-generalized demodulation transform, for non-stationary signals, whose true time variations of instantaneous frequencies are unknown and difficult to extract from the time ...
Dezun Zhao +3 more
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Energies, 2023 Processing physical quantities into an indirect signal is a standard method of transferring information about the measured quantity to the master system, which analyzes the data obtained from the acquisition system.
Dariusz Świsulski, Piotr Warda
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Recasting the (Synchrosqueezed) Short-Time Fourier Transform as an Instantaneous Spectrum
Entropy, 2022 In a previous work, we proposed a time-frequency analysis called instantaneous spectral analysis (ISA), which generalizes the notion of the Fourier spectrum and in which instantaneous frequency is utilized to the fullest extent.
Steven Sandoval, Phillip L. De Leon
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An Instantaneous Frequency Identification Algorithm for Time-Varying Frequency Signals
IEEE Access, 2019 A high-precision instantaneous frequency (IF) identification algorithm is proposed in this paper. The algorithm is based on the relationship between the signal phase and time, and uses Taylor's expansion to parameterize the time-varying frequency. It can
Li Xiaocong, Meng Xuanren
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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
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Method for Simultaneous Monitoring of Uterine Contractions and Abdominal Pushing in a Childbirth [PDF]
International Journal of Electronics and Telecommunications, 2023 Effective and safe labour requires good cooperation of all the physiological systems. A proper synchronization of uterine and abdominal muscles is necessary for labour progression. Therefore, a new method for simultaneous monitoring of uterine activities
Dariusz S. Radomski
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Instantaneous frequencies in the Kuramoto model [PDF]
Physical Review E, 2020 Using the main results of the Kuramoto theory of globally coupled phase oscillators combined with methods from probability and generalized function theory in a geometric analysis, we extend Kuramoto's results and obtain a mathematical description of the instantaneous frequency (phase-velocity) distribution.
da Fonseca, Julio +2 more
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Evaluation of internal boundary surface using instantaneous frequency of ultrasonic pulse
Nihon Kikai Gakkai ronbunshu, 2015 An evaluation technique of internal boundary surface using instantaneous frequency of ultrasonic pulse is proposed. The instantaneous frequency represents a variation of the frequency of the ultrasonic pulse waveform from moment to moment. In this paper,
Takumi INOUE +2 more
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Wideband High-Speed and High-Accuracy Instantaneous Frequency Measurement System
IEEE Photonics Journal, 2023 A new photonic-assisted instantaneous frequency measurement system is presented. It overcomes the latency problem in the reported structures based on the frequency-to-time mapping technique or the frequency-to-power mapping technique that involves a long
Chongjia Huang +3 more
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