Results 71 to 80 of about 4,021,406 (264)
Orthogonal frequency division multiplexing with cascade index modulation
IET Communications, 2022 As an emerging technique, index modulation (IM) can improve the system bit error rate (BER) performance due to the robustness of index bits over conventional modulated symbol bits.
Zeng Hu +3 more
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
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
Investigation of Blanking Nonlinearity in OFDM Systems
, 2011 In this paper, we analyze the influence of a blanking nonlinearity onto OFDM systems in detail. We will derive closedform expressions for the signal degradation and the interference, which is introduced by the blanking nonlinearity.
Michael Schnell +5 more
core +1 more source
Orthogonal Frequency Division Multiplexing With Generalized Joint Index Modulation
IEEE Open Journal of the Communications SocietyOrthogonal frequency division multiplexing with index modulation (OFDM-IM) is a promising multi-carrier technique for next generation wireless communication networks.
Zeng Hu +7 more
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
IEEE Access, 2017 Orthogonal frequency-division multiplexing (OFDM) with index modulation has been emerged as a promising technique for next-generation networks, where the specific activation pattern of the OFDM subcarriers is capable of conveying additional information ...
Tianqi Mao +3 more
doaj +1 more source
IEEE Open Journal of Vehicular Technology, 2021 In this paper, we propose two new multiple-access schemes for downlink transmission based on the combination of orthogonal frequency division multiplexing (OFDM) with index modulation (IM), namely OFDM-IM.
Said El-Khamy +2 more
doaj +1 more source
IET Communications, Volume 20, Issue 1, January/December 2026.A hybrid framework of deep learning‐based channel estimation for robust communication in free space optical (FSO)‐based low earth orbit (LEO) satellite system using advanced modulation formats for orthogonal frequency division multiplexing (OFDM) transmission. Simulations demonstrate that STA‐ SRCNN and STA‐DNCNN excel in terrestrial FSO channels (NMSE
Saad Rustum +4 more
wiley +1 more source
Coherent and Non-Coherent Multilayer Index Modulation
IEEE Access, 2019 Index modulation assisted OFDM (OFDM-IM) has become a popular technique in wireless communications. In this paper, we proposes a novel multilayer framework for OFDM-IM.
Sarath Gopi +2 more
doaj +1 more source