Results 21 to 30 of about 2,939,069 (250)

Random Access Preamble Generation with Low Storage for LTE Networks

ITM Web of Conferences, 2017
Long Term Evolution (LTE) random access preambles are generated from cyclically shifted Zadoff-Chu(ZC) sequences of prime length by using so-called Discrete Fourier Transformation-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) modulation.
Xin Pei-Zhe, Lv Yu-Qi, Su Lan, Wang Yu-Dong   +3 more
doaj   +1 more source

Efficiency Comparison of DFT/IDFT Algorithms by Evaluating Diverse Hardware Implementations, Parallelization Prospects and Possible Improvements

Proceedings of the International Conference on Applied Innovations in IT, 2014
In this paper we investigate various algorithms for performing Fast Fourier Transformation (FFT)/Inverse Fast Fourier Transformation (IFFT), and proper techniques for maximizing the FFT/IFFT execution speed, such as pipelining or parallel processing, and
Danijela Efnusheva, Natasha Tagasovska, Aristotel Tentov, Marija Kalendar   +3 more
doaj   +1 more source

Discrete Pseudo-Fractional Fourier Transform and Its Fast Algorithm

, 2021
In this article, we introduce a new discrete fractional transform for data sequences whose size is a composite number. The main kernels of the introduced transform are small-size discrete fractional Fourier transforms. Since the introduced transformation
Dorota Majorkowska-Mech, Aleksandr Cariow   +1 more
core   +1 more source

THE DEVELOPMENT OF ALGORITHMS FOR CALCULATING THEORETICAL- NUMERICAL SIGNAL TRANSFORMATIONS WITH THE LEAST NUMBER OF MULTIPLICATIONS

Современная наука и инновации, 2022
When using a discrete Fourier transform (DFT) to solve digital signal processing (DSP) problems, errors occur in rounding or truncating the results of operations to the word length used by specialized processors (SP).
M. I. Kalmykov, D. V. Yurdanov, I. A. Kalmykov, I. D. Efremenkov   +3 more
doaj   +1 more source

Multi-qubit quantum computing using discrete-time quantum walks on closed graphs

Scientific Reports, 2023
Universal quantum computation can be realised using both continuous-time and discrete-time quantum walks. We present a version based on single particle discrete-time quantum walk to realize multi-qubit computation tasks.
Prateek Chawla, Shivani Singh, Aman Agarwal, Sarvesh Srinivasan, C. M. Chandrashekar   +4 more
doaj   +1 more source

Fast-responding measurements of power system harmonics using discrete and fast fourier transforms with low spectral leakage [PDF]

, 2011
Conventional wisdom dictates that a Fast Fourier Transform (FFT) will be a more computationally effective method for measuring multiple harmonics than a Discrete Fourier Transform (DFT) approach.
Burt, Graeme M., Carter, R., Cruden, A., Roscoe, Andrew J.   +3 more
core   +3 more sources

Fast calculation algorithm for discrete resonance-based band-pass filter

Alexandria Engineering Journal, 2016
A discrete resonant band-pass filter with a fast calculation algorithm, which can be used to perform discrete frequency transformations, is presented. The algorithm has low memory consumption requirements.
Toso Pankovski
doaj   +1 more source

Digital image watermarking using discrete cosine transformation based linear modulation

Journal of Cloud Computing: Advances, Systems and Applications, 2023
The proportion of multimedia traffic in data networks has grown substantially as a result of advancements in IT. As a result, it's become necessary to address the following challenges in protecting multimedia data: prevention of unauthorized disclosure ...
Waleed Alomoush, Osama A. Khashan, Ayat Alrosan, Hani H. Attar, Ammar Almomani, Fuad Alhosban, Sharif Naser Makhadmeh   +6 more
doaj   +1 more source

Linearly Implicit High-Order Exponential Integrators Conservative Runge–Kutta Schemes for the Fractional Schrödinger Equation

Fractal and Fractional, 2022
In this paper, a family of high-order linearly implicit exponential integrators conservative schemes is constructed for solving the multi-dimensional nonlinear fractional Schrödinger equation.
Yayun Fu, Qianqian Zheng, Yanmin Zhao, Zhuangzhi Xu   +3 more
doaj   +1 more source

Mathematical modeling of signals, linear links and responses of telecommunications and radioelectronics systems in time domain

Доклады Белорусского государственного университета информатики и радиоэлектроники, 2021
A single mathematical model of time characteristics of signals, links and responses of telecommunications and radioelectronics systems is suggested. It embodies Dirac- and Heaviside responses of all types of linear links, as well as their responses to ...
N. I. Belenkevich, V. A. Ilyinkov
doaj   +1 more source