Results 281 to 290 of about 89,376 (355)

The hopping discrete fractional Fourier transform

Signal Processing, 2021
Abstract The discrete fractional Fourier transform (DFrFT) is a powerful signal processing tool for non-stationary signals. Many types of DFrFT have been derived and successful used in different areas. However, for real-time applications that require recalculating the DFrFT at each or several samples, the existing discrete algorithms aren’t the ...
Yu Liu, Feng Zhang, Hongxia Miao, R. Tao
semanticscholar   +2 more sources

Sliding 2D Discrete Fractional Fourier Transform

IEEE Signal Processing Letters, 2019
The two-dimensional discrete fractional Fourier transform (2D DFrFT) has been shown to be a powerful tool for 2D signal processing. However, the existing discrete algorithms aren’t the optimal for real-time applications, where the input signals are ...
Yu Liu, Hongxia Miao, Feng Zhang, R. Tao
semanticscholar   +2 more sources

Discrete fractional Fourier transform based on orthogonal projections

IEEE Transactions on Signal Processing, 1999
Summary: The continuous fractional Fourier transform (FRFT) performs a spectrum rotation of signal in the time-frequency plane, and it becomes an important tool for time-varying signal analysis. A discrete fractional Fourier transform has been recently developed by \textit{B. Santhanam} and \textit{J. H.
S. Pei, M. Yeh, C. Tseng
semanticscholar   +3 more sources

The multiple-parameter discrete fractional Fourier transform

IEEE Signal Processing Letters, 2006
The discrete fractional Fourier transform (DFRFT) is a generalization of the discrete Fourier transform (DFT) with one additional order parameter. In this letter, we extend the DFRFT to have N order parameters, where N is the number of the input data points.
S. Pei, Wen-Liang Hsue
semanticscholar   +2 more sources

Real-Time Discrete Fractional Fourier Transform Using Metamaterial Coupled Lines Network

IEEE transactions on microwave theory and techniques, 2023
Discrete fractional Fourier transforms (DFrFTs) are universal mathematical tools in signal processing, communications, and microwave sensing. Despite the excessive applications of DFrFT, the implementation of corresponding fractional orders in the ...
R. Keshavarz, N. Shariati, M. Miri
semanticscholar   +1 more source

FPGA-Based Implementation of Discrete Fractional Fourier Transform Algorithm

International Conference on Wireless Communications and Signal Processing, 2022
Fractional Fourier transform (FrFT) has been taken a considerable attention in signal and image processing domain. On the evolution of discrete form of FrFT, low computational complexity is essential in practical applications.
Ruoyu Wang, Peng Chen, Danyang Wang
semanticscholar   +1 more source

Double-image compression and encryption scheme based on chaotic system and real-preserving multi-order discrete fractional Fourier transform

Journal of Modern Optics, 2022
In order to reduce the amount of data transmission and key consumption, a double-image compression and encryption scheme based on chaotic system and real-preserving multi-order discrete fractional Fourier transform (RPMODFrFT) is proposed in this paper ...
Mengmeng Wang, Chuang Zhu, Lu Li, Man-tao Xu   +3 more
semanticscholar   +1 more source

Mitigating the Time-Varying Doppler Shift in High-Mobility Wireless Communications Using Multi-Angle Centered Discrete Fractional Fourier Transform

Ubiquitous Computing, Electronics & Mobile Communication Conference, 2021
This paper investigates high-mobility communications between a moving transceiver and a base station (BS) and proposes a time-frequency scheme with Doppler suppression.
A. R. Nafchi, Mona Esmaeili, A. Ghasempour, E. Hamke, Balu Santhanam, Ramiro Jordan   +5 more
semanticscholar   +1 more source

Detection of Fractional Fourier Transform Rotated Chype Pulse with a Discrete Chype Transform

International Radar Conference, 2023
Many radar systems use linear chirp signals to locate targets. Detection is done by a matched filter (MF), which looks for a correlation peak between the received and transmitted signals.
S. Sud
semanticscholar   +1 more source

Fractional discrete Fourier transforms

Optics Letters, 1996
Direct calculation of fractional Fourier transforms from the expressions derived for their optical implementation is laborious. An extension of the discrete Fourier transform would have only O(N(2)) computational complexity. We define such a system, offer a general way to compute the fractional discrete Fourier transform matrix, and numerically ...
Z T, Deng, H J, Caulfield, M, Schamschula   +2 more
openaire   +2 more sources