Results 71 to 80 of about 60,608 (216)
IET Communications, Volume 19, Issue 1, January/December 2025.The robustness against timing offsets of filter bank multi‐carrier (FBMC) is appealing for grant‐free massive access scenarios that mainly adopt asynchronous transmissions. In this work, we propose a compressed sensing based algorithm for joint active user detection as well as timing offset and channel estimation in uplink communication under the ...
Yuhao Qi +4 more
wiley +1 more source
Localization Using Joint AOD and RSS Method in Massive MIMO System [PDF]
Radioengineering, 2019 In this research, we propose to estimate location of mobile users by using joint angle of departure (AOD) from base station (BS) and received signal strength (RSS) at user equipment (UE) method.
W. A. Mahyiddin +5 more
doaj
Scheme Design of SR‐DCSK‐WPC System With Energy Buffer in RIS‐Assisted Design
IET Communications, Volume 19, Issue 1, January/December 2025.This research examines the performance improvement of chaotic communication assisted by reconfigurable intelligent surface. Currently, our paper explores the time switching scheme of SWIPT system and the time allocation characteristics of short reference technology, and reconstructs the implementation scheme of the time allocation coefficient.
Gongquan Zhang +3 more
wiley +1 more source
DCT/IDCT-based interpolation for channel estimation in OFDM systems(OFDM系统DCT/IDCT插值信道估计算法)
Zhejiang Daxue xuebao. Lixue ban, 2008 导频辅助信道估计是OFDM系统常用的信道估计算法，本文研究基于变换域的导频辅助信道估计算法.在DFT插值法的基础上，提出了基于离散余弦变换(DCT)的信道估计方法.仿真结果表明，该插值算法的MSE和SER性能优于DFT方法.与MMSE算法相比，该插值算法计算复杂度低，易于物理实现.
JINNing(金宁) +2 more
doaj +1 more source
Method for Phase Noise Impact Compensation in 60 GHz OFDM Receivers [PDF]
Radioengineering, 2020 This paper presents a method for phase noise impact compensation in 60 GHz OFDM receivers and provides the results of performance evaluation using OFDM PHY parameters defined in the IEEE 802.11ay standard.
A. Lomayev +4 more
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Multiplexing of Mixed Numerologies in OFDM/Filtered-OFDM Systems
, 2019 The flexibility in supporting heterogeneous services with vastly different technical requirements is one of the distinguishing characteristics of the fifth generation (5G) communication systems and beyond. A generic framework is developed in this thesis to address the coexistence/isolation issues of mixing multiple services over a unified physical ...
openaire +4 more sources
ICTACT Journal on Communication Technology, 2021 In order to optimize power allocation, Orthogonal frequency division multiplexing (OFDM) based cognitive radio (CR) network allows flexible spectrum and adaptive capability.
Sandeep Kumar Jain, Baljeet Kaur
doaj
Progressive image transmission over OFDM systems using multiple antennas [PDF]
, 2000 Jie Song, K.J. Ray Liu
openalex +2 more sources
OFDMA para Sistemas de Banda Ancha Inalámbrica
Prisma Tecnológico, 2009 Este artículo describe el sistema de Acceso Múltiple por División de Frecuencia Ortogonal (OFDMA), un método de modulación para la segunda generación de acceso a banda ancha inalámbrica.
Daniel Tuñón, Ramón Ortega
doaj
PAPR Reduction and Data Security Improvement for OFDM Technique Using Chaos System
Journal of Communications Software and Systems, 2019 Orthogonal Frequency Division Multiplexing (OFDM) is the most popular multicarrier technique because it produces several advantages such as higher spectral efficiency, high transmission rate, robustness to fading channel and etc..
Muntadher Kadhim Abdullah +1 more
doaj