Results 61 to 70 of about 49,895 (236)
Estudo da transformada de Walsh-Hadamard aplicada à transmissão OFDM [PDF]
, 2006 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica.Esta dissertação apresenta um estudo da aplicação da Transformada de Walsh-Hadamard (WHT) em diferentes sistemas OFDM ...
Doniak, Marcio Henrique
core
Information, 2019 Orthogonal frequency division multiplexing (OFDM) has become an indispensable part of waveform generation in wideband digital communication since its first appearance in digital audio broadcasting (DAB) in Europe in 1980s, and it is indeed in use. As has
Somayeh Mohammady +3 more
doaj +1 more source
Alzheimer's &Dementia, Volume 22, Issue 1, January 2026.Abstract INTRODUCTION White matter hyperintensities (WMHs) are strongly associated with cognitive decline and dementia, but whether asymptomatic individuals with moderate‐to‐severe WMHs (msWMHs) are truly cognitively intact, particularly in visual short‐term memory (VSTM), remains unclear.
Aonan Li +7 more
wiley +1 more source
Synchronization technics for OFDM systems [PDF]
, 2006 [ENGLISH] The thesis deals with the problem of synchronization in Orthogonal Frequency Division Multiplexing (OFDM) systems. This modulation technique has been in existence since 1960, however, in the last years OFDM modulation is emerged as a key ...
Fusco, Tilde
core
International Journal of Technology, 2021 The bi-orthogonal codes for embedding Side-Information (SI) in data-based blind SLM (BSLM) proposed in Joo et al. (2012) produce better bit error rate (BER) and SI error rate (SIER) performance compared to binary codes.
Adnan Haider Yusef Sa'd +2 more
doaj +1 more source
TranQuiL: Long Range Detection and Localization of Interference in Radio Quiet Zones
Radio Science, Volume 61, Issue 1, January 2026.Abstract Radio Quiet Zones (RQZs) have been established to prevent radio sources from causing harmful interference to sensitive radio telescopes, which study extremely faint cosmic radio waves. Even with strict regulations, such interference is growing due to the widespread use of consumer electronics, emitting in many different frequency bands ...
Atul Bansal +5 more
wiley +1 more source
Performance Analysis of Framelet Based OFDM System Under Different Channel Conditions [PDF]
Engineering and Technology Journal, 2012 In this paper, the Framelet Transform (FT) is proposed as a new modulation technique in the realization of Orthogonal Frequency Division Multiplexing (OFDM).
Atheer A. Sabri, Ziad Q. Abdulkareem
doaj +1 more source
A Supervised Learning Method for High‐Performance Channel State Information Estimation
IET Communications, Volume 20, Issue 1, January/December 2026.This paper proposes a deep neural network (DNN)‐based method for channel state information (CSI) estimation, incorporating a Discrete Fourier Transform (DFT) step to reduce noise impact and improve learning accuracy. Simulation results demonstrate that the proposed method achieves superior channel estimation performance, particularly in noisy wireless ...
Tianle Han, Yongwei Zhang, Murat Temiz
wiley +1 more source
Analisis Inverse Pulse Position Modulation OFDM pada Komunikasi Ultra Wideband
Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems), 2022 Peningkatkan keandalan sistem multiband orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) dengan memanfaatkan waktu bersama dan demodulasi domain frekuensi diharapkan dapat meningkatkan kinerja.
Lucky Nindya Palupi, Totok Winarno
doaj +1 more source
Acceleration‐Aware Estimation and Compensation of Doppler Scale for Mobile UWA OFDM Systems
IET Communications, Volume 20, Issue 1, January/December 2026.We propose a novel method to estimate and compensate for the Doppler scale caused by acceleration in orthogonal frequency division multiplexing (OFDM)‐based underwater acoustic (UWA) systems. Simulation results under additive white Gaussian noise (AWGN), synthetic multipath and realistic waymark channel conditions demonstrate that the proposed approach
Yong‐Ho Cho, Seung‐Geun Kim
wiley +1 more source