Results 61 to 70 of about 2,662 (145)

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, Tianqi ZHANG, Gang ZHANG, Baoze MA   +3 more
doaj   +2 more sources

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

Image Encryption Based on Fourier-DNA Coding for Hyperchaotic Chen System, Chen-Based Binary Quantization S-Box, and Variable-Base Modulo Operation

IEEE Access
This research work extends the hyperchaotic 4D Chen system into the fractional-order domain to carry out image encryption over 3 stages. For the first encryption stage, the discrete Fourier transform (DFT) of the numerical solution of the fractional ...
Wassim Alexan, Dina El-Damak, Mohamed Gabr   +2 more
doaj   +1 more source

Remarks on numerical approximation of Volterra integral equations by Walsh–Hadamard transform

Results in Applied Mathematics
Walsh functions form a piecewise-constant orthonormal basis that is particularly well-suited for digital computation and signal approximation. Nevertheless, the direct evaluation of Walsh transforms for discrete functions becomes computationally ...
Farrukh Mukhamedov, Ushangi Goginava, Akaki Goginava, James Wheeldon   +3 more
doaj   +1 more source

Stability analysis and numerical simulation of nonlocal extended epidemic models using positivity-preserving scheme. [PDF]

Sci Rep
Yousuf M, Alshakhoury N.
europepmc   +1 more source

Generalization of Bandlimited Functions and Applications to Quantum Probability Distributions. [PDF]

Entropy (Basel)
Cohen L.
europepmc   +1 more source

Direct FFT oversampling without zero-padding. [PDF]

Sci Rep
Donciu C, Temneanu MC, Serea E.
europepmc   +1 more source

Hadamard gate realization based on quantum Fourier transform for the creation of quantum numbers in the integrated optical domain. [PDF]

Sci Rep
Armaghani S, Rostami A.
europepmc   +1 more source

Existence and stability of time-fractional Keller-Segel-Navier-Stokes system with Poisson jumps. [PDF]

Sci Rep
Divyabala K, Durga N.
europepmc   +1 more source

Iterative Amplitude Equalization for Frequency Estimation (IAE-DFT). [PDF]

Sensors (Basel)
Serea E, Donciu C, Temneanu MC.
europepmc   +1 more source