Results 71 to 80 of about 995,967 (198)

Demographic Biases in Naturalistic Language Recordings in the CHILDES Database

Developmental Science, Volume 28, Issue 3, May 2025.
ABSTRACT In recent years, the importance of estimating demographic biases in research has become apparent. Here, we provide a systematic review of the CHILDES database, the major source of naturalistic recordings of children's linguistic environment.
Camila Scaff, Georgia Loukatou, Alejandrina Cristia, Naomi Havron   +3 more
wiley   +1 more source

Multiuser MIMO-OFDM for Visible Light Communications

IEEE Photonics Journal, 2015
Visible light communication (VLC) is emerging as a promising technique to provide ubiquitous wireless connection. In this paper, a multiuser VLC system utilizing multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) is ...
Qi Wang, Zhaocheng Wang, Linglong Dai
doaj   +1 more source

Performance analysis of linear precoders with imperfect channel covariance information for multicell system

The Journal of Engineering, 2020
Comparison and analysis of the regularised zero forcing precoder, rapid numerical algorithms-based precoder and the truncated polynomial expansion-based precoder are done for massive multiple-input multiple-output wireless system for multicell scenario ...
Emmanuel Mukubwa, Oludare A. Sokoya
doaj   +1 more source

Enhancing System Capacity Through Joint Space‐Ground Multi‐Beam Coordination for LEO Satellite Systems

Engineering Reports, Volume 7, Issue 1, January 2025.
ABSTRACT Due to the long transmission distance of the constellation network represented by the low‐orbit satellite system, the satellite‐to‐ground link is subject to large path loss and limited communication performance. This paper uses multi‐satellite and multi‐beam joint transmission technology to form a virtual multiplex network with ground multi ...
Yuyang Liu, Tong Shi, Hua Wang
wiley   +1 more source

Physical layer security in satellite communication: State‐of‐the‐art and open problems

IET Communications, Volume 19, Issue 1, January/December 2025.
This paper first classifies contemporary satellite communication networks into five domains and then analyse the use of PLS in each domain; these domains are hybrid satellite‐terrestrial networks, satellite‐based IoT, navigation satellite systems, FSO‐based satellites, and inter‐satellite communications.
Nora Abdelsalam, Saif Al‐Kuwari, Aiman Erbad   +2 more
wiley   +1 more source

Detection Strategies for MIMO‐GFDM‐IM System

IET Communications, Volume 19, Issue 1, January/December 2025.
Dedicated to studying the multiple‐input multiple‐output generalized frequency division multiplexing with index modulation wireless communication system, this paper highlights its high spectral and energy efficiency, robustness against multipath channels.
José Luis Calpa Juajinoy, João Cal‐Braz, Raimundo Sampaio‐Neto   +2 more
wiley   +1 more source

A Novel FBMC/QAM Scheme to Eliminate the Error Floor in Multipath Channels

IET Communications, Volume 19, Issue 1, January/December 2025.
This paper proposes a cyclic prefix–based filter bank multicarrier with quadrature amplitude modulation (CP‐FBMC/QAM) scheme to eliminate the error floor and simplify the receiver in multipath fading channels. Moreover, to avoid the increase of out‐of‐band (OOB) radiation caused by the CP insertion, we propose a prototype filter optimization problem ...
Yufeng Zhang, Xueqin Chen
wiley   +1 more source

ANALISIS PENGARUH PENGGUNAAN ZERO FORCING LINEAR PRECODING PADA MASSIVE MIMO TERHADAP PERFORMANSI SISTEM KOMUNIKASI RADIO FREKUENSI [PDF]

, 2023
Teknologi Massive MIMO adalah perkembangan dari sistem MIMO yang memiliki kapasitas besar guna meningkatkan throughput dan efisiensi spektrum untuk melayani beberapa pelanggan dalam waktu yang bersamaan.
Adisty Nurrahmah Laili, -
core  

Secrecy enhancement in wireless networks using precoding-aided rate splitting strategies

Franklin Open
In the presence of an eavesdropper, the Rate Splitting (RS) technique has been proposed in a Multiple Access Network in this research. By using RS, a message sent from Base Station (BS) is divided into common and private sections.
Rezwana Sultana, Md. Arifuzzaman, Tamim Hossen, Partho Kumer Nonda   +3 more
doaj   +1 more source

Nonlinear Visible Light Communications Broadcast Channel Precoding: A New Solution for In-flight Systems

IEEE Photonics Journal, 2018
In this paper, we consider a multiuser multiple-input-single-output (MU-MISO) downlink visible light communication (VLC) system deployed in airplane cabins, for serving high-speed Internet to the passengers through the reading lamps.
Dario Tagliaferri, Andrea Matera, Carlo Capsoni, Umberto Spagnolini   +3 more
doaj   +1 more source