Results 41 to 50 of about 35,081 (210)

Alamouti OFDM/OQAM systems with time reversal technique [PDF]

, 2015
Orthogonal Frequency Division Multiplexing with Offset Quadrature Amplitude Modulation (OFDM/OQAM) is a multicarrier modulation scheme that can be considered as an alternative to the conventional Orthogonal Frequency Division Multiplexing (OFDM) with ...
Blel, Ilhem, Bouallegue, Ridha
core  

Coherent Optical DFT-Spread OFDM

, 2011
We consider application of the discrete Fourier transform-spread orthogonal frequency-division multiplexing (DFT-spread OFDM) technique to high-speed fiber optic communications.
Wang, Fanggang, Wang, Xiaodong
core   +2 more sources

Hybrid STA With FNN and CNN Models for Robust Channel Estimation in Turbulent FSO and Doppler‐Affected OFDM transmission for LEO Satellite Communication

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, Usman Habib, Salman Ahmed, Muhammad Ahmad, Muhammad Ijaz   +4 more
wiley   +1 more source

Experimental Demonstration of 1.2-Tb/s Optical PDM SCFDM Superchannel Multicasting by HNLF

IEEE Photonics Journal, 2013
Threefold 1.2-Tb/s optical polarization-division-multiplexing (PDM) single-carrier frequency-division-multiplexing (SCFDM) and orthogonal-frequency-division-multiplexing (OFDM) superchannel multicasting, utilizing multiple-pump four-wave mixing (FWM) by ...
Yuanxiang Chen, Juhao Li, Paikun Zhu, Yingying Xu, Yongqi He, Zhangyuan Chen   +5 more
doaj   +1 more source

Deep‐Learned Channel Estimation for MIMO‐OFDM System by Exploiting Frequency‐Space Correlation

Electronics Letters, Volume 62, Issue 1, January/December 2026.
In massive MIMO–OFDM systems, accurate channel state information acquisition is vital for reliable transmission. Traditional methods fail to fully exploit sparse channel correlation, so an attentive residual autoencoder network is proposed. It uses an autoencoder with attention and residual connections to capture frequency–space correlation, and ...
Yiming Wei, Wenjun Jiang, Chenchen Liu, Xiaojun Yuan, Xiaojing Xu, Hua Rui   +5 more
wiley   +1 more source

Exact Analysis of SIR Performance for the Mobile OFDM Communication Systems Over the Underwater Acoustic Channel

Electronics Letters, Volume 62, Issue 1, January/December 2026.
1.This paper develops an analytical model to calculate the signal‐to‐interference ratio performance of mobile orthogonal frequency division multiplexing underwater acoustic (UWA) communication systems. 2.The model accounts for UWA channel distortion and non‐uniform Doppler effects, maintaining high accuracy across a range of Doppler shift magnitudes. 3.
Xinyu Liu, Xiaowei Li, Mingyang Lu, Yuhang Gao, Miao Yu   +4 more
wiley   +1 more source

Ambiguity Function Optimization Based on Joint Communication and Sensing Waveform

Electronics Letters, Volume 62, Issue 1, January/December 2026.
The sidelobe suppression strategy proposed in this study demonstrates significant advantages. Its ability to effectively reduce ambiguity function sidelobes has important practical significance for engineering. ABSTRACT The ambiguity function (AF) plays a critical role in joint communication and sensing (JCAS) systems. In this letter, we design a novel
Zheming Guo, Baixiao Chen
wiley   +1 more source

Digital Domain Power Division Multiplexing Optical OFDM for Free Space Optical Communication (FSOC) Using 10-GHz Bandwidth Optical Components

IEEE Photonics Journal, 2022
We put forward and provide the first illustration of a high capacity and high spectral efficient free space optical communication (FSOC) system using digital domain power division multiplexing orthogonal-frequency-division-multiplexed (DDPD-O-OFDM ...
Wahyu Hendra Gunawan, Chi-Wai Chow, Yang Liu, Yun-Han Chang, Yin-He Jian, Ching-Wei Peng, Chien-Hung Yeh   +6 more
doaj   +1 more source

PAR-Aware Large-Scale Multi-User MIMO-OFDM Downlink [PDF]

, 2012
We investigate an orthogonal frequency-division multiplexing (OFDM)-based downlink transmission scheme for large-scale multi-user (MU) multiple-input multiple-output (MIMO) wireless systems.
Larsson, Erik G., Studer, Christoph
core   +1 more source

A robust timing and frequency offset estimation scheme for orthogonal frequency division multiplexing (OFDM) systems [PDF]

1999 IEEE 49th Vehicular Technology Conference (Cat. No.99CH36363), 2003
This paper presents a novel, robust technique to estimate timing and frequency offset in an orthogonal frequency division multiplexing (OFDM) system without the use of pilot signals. We first present an overview of an OFDM system for high-speed wireless data communications, including the particular parameters chosen for our design.
B. McNair, L.J. Cimini, N. Sollenberger
openaire   +1 more source