Results 41 to 50 of about 17,638,954 (262)

Zeros of the Wigner distribution and the short-time Fourier transform [PDF]

Revista Matemática Complutense, 2019
AbstractWe study the question under which conditions the zero set of a (cross-) Wigner distribution W(f, g) or a short-time Fourier transform is empty. This is the case when both f and g are generalized Gaussians, but we will construct less obvious examples consisting of exponential functions and their convolutions.
Karlheinz Gröchenig, Philippe Jaming, Eugenia Malinnikova   +2 more
openaire   +5 more sources

Cross-Term Suppression in Time Order Distribution for AWGN Signal [PDF]

Mehran University Research Journal of Engineering and Technology, 2017
A technique of cross-term suppression in WD (Wigner Distribution) for a multi-component signal that is embedded WGN (White Gaussian Noise) is proposed.
WAQAS MAHMOOD, NABEEL ALI KHAN, NOOR MUHAMMAD MEMON, FAYYAZ AHMED CHAUDHRY   +3 more
doaj  

Short-time Fourier transform and superoscillations

Applied and Computational Harmonic Analysis
to appear in Applied and Computational Harmonic ...
Daniel Alpay, Antonino De Martino, Kamal Diki, Daniele C. Struppa   +3 more
openaire   +3 more sources

Intra-pulse modulation recognition using short-time ramanujan Fourier transform spectrogram

EURASIP Journal on Advances in Signal Processing, 2017
Intra-pulse modulation recognition under negative signal-to-noise ratio (SNR) environment is a research challenge. This article presents a robust algorithm for the recognition of 5 types of radar signals with large variation range in the signal ...
Xiurong Ma, Dan Liu, Yunlong Shan
doaj   +1 more source

Uncertainty principles for the short‐time Fourier transform on the lattice

Mathematische Nachrichten, 2023
AbstractIn this paper, we study a few versions of the uncertainty principle for the short‐time Fourier transform on the lattice . In particular, we establish the uncertainty principle for orthonormal sequences, Donoho–Stark's uncertainty principle, Benedicks‐type uncertainty principle, Heisenberg‐type uncertainty principle, and local uncertainty ...
Anirudha Poria, Aparajita Dasgupta
openaire   +2 more sources

Blind Phaseless Short-Time Fourier Transform Recovery [PDF]

IEEE Transactions on Information Theory, 2020
The problem of recovering a pair of signals from their blind phaseless short-time Fourier transform measurements arises in several important phase retrieval applications, including ptychography and ultra-short pulse characterization. In this paper, we prove that in order to determine a pair of generic signals uniquely, up to trivial ambiguities, the ...
Tamir Bendory, Dan Edidin, Yonina C. Eldar   +2 more
openaire   +3 more sources

Synchroextracting Transform Based on the Novel Short-Time Fractional Fourier Transform

Fractal and Fractional
As a generalization of the short-time Fourier transform (STFT), the novel short-time fractional Fourier transform (NSTFRFT) has been introduced recently.
Bei Li, Zhuosheng Zhang
doaj   +1 more source

Interference Suppression Algorithm Based on Short Time Fractional Fourier Transform

Sensors
Narrowband interference and wideband interference are both common jamming signals against synthetic aperture radar, which can degrade the signal severely.
Xiaolu Guo, Jia Su, Nan Zhu
doaj   +1 more source

Time gated Fourier transform spectroscopy as a technique for disentangling short- and long-lived luminescence

Communications Materials, 2023
Overlapping short- and long-lived luminescence signals are often encountered and are not trivial to disentangle in a single measurement. Here, we demonstrate for a broad range of emitters that time gated Fourier transform spectroscopy can be used as a ...
Mikkel Baldtzer Liisberg, Tom Vosch
doaj   +1 more source

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

FEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill, Yelyzaveta Pulnova, Elke De Zitter, Helen M. Ginn, Briony A. Yorke   +4 more
wiley   +1 more source