Results 51 to 60 of about 353 (143)
Performance Improvement by FRFT-OFDM for Visible Light Communication and Positioning Systems
PhotonicsIn indoor visible light communication (VLC) and visible light positioning (VLP) systems, the performance of conventional orthogonal frequency-division multiplexing (OFDM) schemes is often compromised due to the nonlinear characteristics and limited ...
Wenyang Li, Zixiong Wang, Jinlong Yu
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IEEE Photonics Journal, 2019 We propose a novel technique for joint modulation format identification and frequency offset (FO) estimation. The linear frequency modulation signal which is obtained by a direct current signal and Fractional Fourier Transform (FrFT) is superimposed on ...
Yuxiao Guo +6 more
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Design and Detection of Multilinear Chirp Signals for Underwater Acoustic Sensor Networks
International Journal of Distributed Sensor Networks, 2015 In Underwater Acoustic Sensor Networks (UW-ASNs), some key problems have attracted more and more attention, including power consumption, performance of multiple access, and complexity of node.
En Cheng, Shengli Chen, Fei Yuan
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An Algorithm for Target Parameter Estimation Based on Fractional Fourier and Keystone Transforms
Leida xuebao, 2014 An important standard to measure the effectiveness of radar acquisition systems is the accuracy of target parameter estimation. To solve the estimation problem, the echo model of moving targets is established and the FRactional Fourier Transform (FRFT ...
Tian Rui-qi +3 more
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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
Osama S. Faragallah +8 more
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Journal of Harbin University of Science and Technology, 2017 In fault diagnosis of rolling bearings，the fault signal is easy to be interfered by the ambient noise， Therefore，an approach based on Fractional Fourier Transform( FＲFT) is studied in this research to collect valid data of rolling bearing fault.
SHAO Yan, LU Di, YANG Guang-xue
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Fractal and FractionalTo address the limitations of traditional tumor diagnostic methods in image feature extraction and model generalization, this study innovatively proposes a synergistic diagnostic model that integrates fractional Fourier transform (FrFT) and error back ...
Xuanyu Liu +3 more
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Fractional Fourier transform of Airyprime beams
Results in PhysicsAnalytical expressions of the electric field, the centriod, the beam half width, and the linear momentum of the fractional Fourier transform (FrFT) of an Airyprime beam are derived, respectively. The relation between the centriods or the beam half widths
Jian He +5 more
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Detection of Left-Sided and Right-Sided Hearing Loss via Fractional Fourier Transform
Entropy, 2016 In order to detect hearing loss more efficiently and accurately, this study proposed a new method based on fractional Fourier transform (FRFT). Three-dimensional volumetric magnetic resonance images were obtained from 15 patients with left-sided hearing ...
Shuihua Wang +8 more
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Acquisition algorithm for BOC signals in high dynamic environment
Tongxin xuebao, 2019 As the synchronization of binary offset carrier (BOC) signals couldn’t be realized in high dynamic environment by traditional acquisition algorithms,an acquisition algorithm based on fractional Fourier transform (FRFT) and discrete polynomial-phase ...
Yi PAN +3 more
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