Results 61 to 70 of about 467 (179)

Optical Hyperspectral Image Cryptosystem Based on Affine Transform and Fractional Fourier Transform

Applied Sciences, 2019
An encryption algorithm for hyperspectral data in fractional Fourier domain is designed. Firstly, the original hyperspectral image is separated into single bands and then each pair of bands are regarded as the real and imaginary part of a complex ...
Hang Chen, Zhengjun Liu, Camel Tanougast, Jie Ding   +3 more
doaj   +1 more source

Application of Fractional Fourier Transform to Hologram Formation of a Moving Acoustic Source

Fractal and Fractional
This paper examines how the fractional Fourier transform (FrFT) can be used to form and analyze acoustic holograms produced by a moving, linear, frequency-modulated (LFM) source in a shallow water waveguide.
Sergey Pereselkov, Venedikt Kuz’kin, Matthias Ehrhardt, Sergey Tkachenko, Alexey Pereselkov, Nikolay Ladykin   +5 more
doaj   +1 more source

Physical Layer Authenticated Image Encryption for IoT Network Based on Biometric Chaotic Signature for MPFrFT OFDM System. [PDF]

Sensors (Basel), 2023
Hagras EAA, Aldosary S, Khaled H, Hassan TM.   +3 more
europepmc   +1 more source

The MIMO-OFDM System Based on the Optimal Fractional Fourier Transform

工程科学与技术, 2009
:Transmission over wireless fast time varying channels can lead to Inter-cell interference (ICeI) and Inter-carrier Interference (ICaI) in multiple-input multiple output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems.
Wang Hui-Qi, MA Hong
doaj  

Direction-of-Arrival Estimation for Wideband Chirps via Multi-Line Fitting in the Fractional Fourier Domain

IEEE Access
Estimating the direction-of-arrival (DoA) of a wideband chirp signal is an important topic in several modern systems. The referred estimation can be carried out using array signal processing in the fractional Fourier transform (FrFT) domain, which ...
Eulogio G. Huampo, Juliano B. Lima, Jose R. de Oliveira Neto   +2 more
doaj   +1 more source

Hyperspectral Image Classification Based on Fractional Fourier Transform

Remote Sensing
To effectively utilize the rich spectral information of hyperspectral remote sensing images (HRSIs), the fractional Fourier transform (FRFT) feature of HRSIs is proposed to reflect the time-domain and frequency-domain characteristics of a spectral pixel ...
Jing Liu, Lina Lian, Yuanyuan Li, Yi Liu
doaj   +1 more source

Optimized SAR imaging algorithm with SSL constraints for the Azimuth direction. [PDF]

Sci Rep, 2023
Wang Z, Cai M, Wang Q, Chen X.
europepmc   +1 more source

Visualizing quantum states: A pilot study on problem solving in quantum information science education

Physical Review Physics Education Research
In the rapidly evolving interdisciplinary field of quantum information science and technology, a major obstacle is the need to understand advanced mathematics to solve complex problems.
Jonas Bley, Eva Rexigel, Alda Arias, Lars Krupp, Steffen Steinert, Nikolas Longen, Paul Lukowicz, Stefan Küchemann, Jochen Kuhn, Maximilian Kiefer-Emmanouilidis, Artur Widera   +10 more
doaj   +1 more source

Parameter Estimation of LFM Signals Based on PID-PSO-FRFT

Fractal and Fractional
The fractional Fourier transform (FRFT) serves as an effective tool for linear frequency modulated (LFM) signal parameter estimation, whose performance depends on the search efficiency for the optimal transform order.
Xuelian Liu, Tianhang Zhou, Yuchao Wang, Bo Xiao, Yani Chen, Chunyang Wang   +5 more
doaj   +1 more source

A New Method for Erosion Prediction of 90° Elbow Based on Non-Axisymmetric Ultrasonic-Guided Wave and the PSO-LSSVM Algorithm. [PDF]

Sensors (Basel), 2023
Wang Z, Zhou S, Li N, Zeng Y, Li G.
europepmc   +1 more source