Results 1 to 10 of about 21,697 (259)

A new technique for instantaneous frequency rate estimation [PDF]

IEEE Signal Processing Letters, 2002
This letter introduces a two-dimensional bilinear mapping operator referred to as the cubic phase (CP) function. For first-, second-, or third-order polynomial phase signals, the energy of the CP function is concentrated along the frequency rate law of the signal. The function, thus, has an interpretation as a time-frequency rate representation.
P O'Shea
exaly   +3 more sources

Fractional Synchrosqueezing Transformation and its Application in the Estimation of the Instantaneous Frequency of a Rolling Bearing

IEEE Access, 2020
The time-frequency energy distribution processed by a short-time Fourier transform can be compressed to the real instantaneous frequency by the synchrosqueezing transformation (SST), which improves the time-frequency energy concentration of the signal ...
Xin Li, Zengqiang Ma, Suyan Liu, Feiyu Lu   +3 more
doaj   +3 more sources

Direct Instantaneous Frequency Rate Estimation to Improve the Carrier Estimation Performance in Mars Entry, Descent, and Landing Flight

Remote Sensing, 2018
This paper focuses on the carrier estimation performance improvement in Mars entry, descent, and landing (EDL) flights. Carrier reconstruction could be used for trajectory derivation and Martian atmosphere profile inversion, and is the critical ...
Wanhong Hao, Xiaowei Cui, Jianguang Feng, Guangliang Dong, Zhiyong Zhu   +4 more
doaj   +3 more sources

Instantaneous Frequency Estimation Based on Modified Kalman Filter for Cone-Shaped Target

Remote Sensing, 2020
The instantaneous frequency (IF) is a vital parameter for the analysis of non-stationary multicomponent signals, and plays an important role in space cone-shaped target recognition.
Ke Ren, Lan Du, Xiaofei Lu, Zhenyu Zhuo, Lu Li   +4 more
doaj   +3 more sources

Instantaneous Frequency Estimation Algorithm for Power Systems [PDF]

JES: Journal of Engineering Sciences, 2022
This paper deals with the problem of the Instantaneous Frequency (IF) estimation of power systems, to be adopted for example in Phasor Measurement Units (PMUs) used for monitoring, control, and protection.
Christina Aziz, Hany Girgis, Mohamed Nayel   +2 more
doaj   +1 more source

Novel Method for Vibration Sensor-Based Instantaneous Defect Frequency Estimation for Rolling Bearings Under Non-Stationary Conditions

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, Len Gelman, Fulei Chu, Andrew Ball   +3 more
doaj   +1 more source

The LPR Instantaneous Centroid Frequency Attribute Based on the 1D Higher-Order Differential Energy Operator

Remote Sensing, 2023
In ground-penetrating radar (GPR) or lunar-penetrating radar (LPR) interpretation, instantaneous attributes (e.g., instantaneous energy and instantaneous frequency) are often utilized for attribute analysis, and they can also be integrated into a new ...
Xuebing Zhang, Zhengchun Song, Bonan Li, Xuan Feng, Jiangang Zhou, Yipeng Yu, Xin Hu   +6 more
doaj   +1 more source

MULTI-LAYERED CEPSTRUM FOR INSTANTANEOUS FREQUENCY ESTIMATION [PDF]

2018 IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2018
In 2018 6th IEEE Global Conference on Signal and Information ...
Chin-Yun Yu, Li Su 0004
openaire   +2 more sources

Power spectrum slope confounds estimation of instantaneous oscillatory frequency

NeuroImage, 2022
Oscillatory neural dynamics are highly non-stationary and require methods capable of quantifying time-resolved changes in oscillatory activity in order to understand neural function.
Jason Samaha, Michael X. Cohen
doaj   +1 more source

Fractional Differential Equation-Based Instantaneous Frequency Estimation for Signal Reconstruction

Fractal and Fractional, 2021
In this paper, we propose a fractional differential equation (FDE)-based approach for the estimation of instantaneous frequencies for windowed signals as a part of signal reconstruction.
Bilgi Görkem Yazgaç, Mürvet Kırcı
doaj   +1 more source