Results 1 to 10 of about 448 (161)
Investigation of Chaotic Image Encryption in Spatial and FrFT Domains for Cybersecurity Applications
IEEE Access, 2020 The need for cybersecurity increases to protect the exchange of information for improving the data privacy. This paper presents an investigation of the encryption efficiency of the chaotic-based image block ciphering in the spatial and Fractional Fourier
Mohammed Alzain +2 more
exaly +3 more sources
Rotor UAV’s Micro-Doppler Signal Detection and Parameter Estimation Based on FRFT-FSST [PDF]
Sensors, 2021 exaly +2 more sources
Applied Sciences, 2021 Fractional Fourier transform (FrFT) is a useful tool to detect linear frequency modulated (LFM) signal. However, the detection performance of the FrFT-based method will deteriorate drastically in underwater multi-path environment.
Zhichen Zhang, Haiyan Wang, Haiyang Yao
doaj +1 more source
Fractional Fourier transforms of vortex Hermite-cosh-Gaussian beams
Results in Optics, 2021 In this paper, we investigate the propagation properties of a vortex Hermite-cosh-Gaussian beam (vHChGB) passing through a fractional Fourier transform (FRFT) optical system.
E.M. El Halba, Z. Hricha, A. Belafhal
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Hyperbolic FRFT‐FBMC for 5G signals [PDF]
IET Communications, 2019 This study considers a novel type of signal for 5G communications based on filter bank multi‐carrier‐quadrature amplitude modulation (FBMC‐QAM). In this new method, the innovative type of fractional Fourier transform on the basis of hyperbolic chirps that denominated as hyperbolic fractional Fourier transform (FRFT) is implemented.
Mohammad Reza Mousavi 0002 +2 more
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Compressed Sampling in Shift-Invariant Spaces Associated With FrFT [PDF]
IEEE Access, 2021 Shift-invariant and sampling spaces play a vital role in the fields of signal processing and image processing. In this paper, we extend the generalized shift-invariant and sampling subspaces from the traditional sampling spaces to the compressed sampling, and develop a compressed sampling method for analog sparse signals based on the shift-invariant ...
Haoran Zhao, Lei Zhang 0033, Liyan Qiao
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The Solvability of a Class of Convolution Equations Associated with 2D FRFT
Mathematics, 2020 In this paper, the solvability of a class of convolution equations is discussed by using two-dimensional (2D) fractional Fourier transform (FRFT) in polar coordinates. Firstly, we generalize the 2D FRFT to the polar coordinates setting.
Zhen-Wei Li, Wen-Biao Gao, Bing-Zhao Li
doaj +1 more source
Fractional Fourier Transform-Based Tensor RX for Hyperspectral Anomaly Detection
Remote Sensing, 2022 Anomaly targets in a hyperspectral image (HSI) are often multi-pixel, rather than single-pixel, objects. Therefore, algorithms using a test point vector may ignore the spatial characteristics of the test point.
Lili Zhang +3 more
doaj +1 more source
Mitigation of Fiber Nonlinearity Effects in Ultra High-Dense WDM System by Using Fractional Fourier Transform for 32 Channel System [PDF]
Engineering and Technology Journal, 2016 The optical signal is severely degraded when transmitted in the fiber due to both the linear and nonlinear distortions. It is well known that, the linear distortions in single mode fiber include chromatic dispersion (CD) and polarization-mode dispersion (
Ali Y. Fattah, Saif Hussam Abdul-Wahed
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EURASIP Journal on Audio, Speech, and Music Processing, 2009 Fractional Fourier transform (FrFT) has been proposed to improve the time-frequency resolution in signal analysis and processing. However, selecting the FrFT transform order for the proper analysis of multicomponent signals like speech is still debated.
Yin Hui, Nadeu Climent, Hohmann Volker
doaj +2 more sources