Results 61 to 70 of about 14,760 (220)

Comb‐Driven Coherent Optical Transmitter for Scalable DWDM Interconnects

Laser &Photonics Reviews, EarlyView.
A comb‐driven coherent optical transmitter on a Si/SiN platform enables scalable DWDM interconnects by integrating ultra‐compact microring‐assisted modulators and interleavers. High‐baud coherent signaling achieves 400 Gb/s per wavelength and >$>$1 Tb/s multi‐channel transmission, with projected >$>$10 Tb/s per fiber, offering a path toward energy ...
Alireza Geravand, Erwan Weckenmann, Jean‐Michel Vallée, Farshid Shateri, Zibo Zheng, Simon Levasseur, Bo Yang, Jiajian Chen, Ting Wang, Zihao Wang, Leslie A. Rusch, Wei Shi   +11 more
wiley   +1 more source

Linear Precoding With Low-Resolution DACs for Massive MU-MIMO-OFDM Downlink

, 2019
We consider the downlink of a massive multiuser (MU) multiple-input multiple-output (MIMO) system in which the base station (BS) is equipped with low-resolution digital-to-analog converters (DACs). In contrast to most existing results, we assume that the
Durisi, Giuseppe,, Studer, Christoph, Studer, Christoph,, Coldrey, Mikael, Jacobsson, Sven, Durisi, Giuseppe, Coldrey, Mikael,, Jacobsson, Sven,   +7 more
core   +1 more source

A Simulation Framework for Multiple-Antenna Terminals in 5G Massive MIMO Systems

IEEE Access, 2017
The recent interest in massive multiple in multiple out (MIMO) has spurred intensive work on massive MIMO channel modeling in the contemporary literature. However, current models fail to take the characteristics of terminal antennas into account.
Erik L. Bengtsson, Fredrik Rusek, Steffen Malkowsky, Fredrik Tufvesson, Peter C. Karlsson, Ove Edfors   +5 more
doaj   +1 more source

Integrated LEO Constellation and In‐Cabin Distribution System for Continuous Aircraft 5G Connectivity

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT The integration of low Earth orbit (LEO) satellite constellations with commercial aircraft communication systems presents critical challenges in maintaining continuous connectivity during dynamic flight conditions. Current geostationary satellite systems suffer from high round‐trip latency (>$$ > $$ 500 ms) and inadequate coverage at high ...
Raúl Parada, Victor Monzon Baeza, Carlos Horcajo Fernández de Gamboa, Rocío Serrano Camacho, Carlos Monzo   +4 more
wiley   +1 more source

Nonlinear 1-bit precoding for massive MU-MIMO with higher-order modulation

, 2016
Massive multi-user (MU) multiple-input multiple-output (MIMO) is widely believed to be a core technology for the upcoming fifth-generation (5G) wireless communication standards. The use of low-precision digital-to-analog converters (DACs) in MU-MIMO base
Goldstein, Tom, Giuseppe Durisi, Durisi, Giuseppe,, Coldrey, Mikael, Goldstein, Tom,, Durisi, Giuseppe, Jacobsson, Sven,, Sven Jacobsson, Christoph Studer, Studer, Christoph, Studer, Christoph,, Tom Goldstein, Jacobsson, Sven, Mikael Coldrey, Coldrey, Mikael,   +14 more
core   +1 more source

Massive MIMO for Full-Duplex Cellular Two-Way Relay Network: A Spectral Efficiency Study

IEEE Access, 2017
This paper presents the new analysis of the applications of massive multiple-input-multiple-output (MIMO) in full-duplex (FD) cellular two-way relay networks, and sheds valuable insights on the interactions between massive MIMO, and relay and duplex ...
Zhaoxi Fang, Wei Ni, Feng Liang, Pengfei Shao, Yaohui Wu   +4 more
doaj   +1 more source

Cell-Free Massive MIMO with Energy-Efficient Downlink Operation in Industrial IoT

Mathematics, 2022
Cell-free massive Multi-input Multi-output (MIMO) can offer higher spectral efficiency compared with cellular massive MIMO by providing services to users through the collaboration of distributed APs, and cell-free massive MIMO systems with distributed ...
Xiaomin Chen, Taotao Zhao, Qiang Sun, Qiaosheng Hu, Miaomiao Xu   +4 more
doaj   +1 more source

ON–OFF Analog Beamforming for Massive MIMO [PDF]

IEEE Transactions on Vehicular Technology, 2018
This paper investigates a new analog beamforming architecture for massive multiple-input multiple-output (MIMO) systems, where each of the multiple transmit antennas is switched to be on or off to form a beam according to the channel state information at transmitters.
Shengli Zhang 0001, Chongtao Guo, Taotao Wang, Wei Zhang 0001   +3 more
openaire   +2 more sources

Low‐Complexity Hybrid Beamforming for LEO Satellites: Beam Update Rate Analysis and Advanced Adaptive Precoding

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Low Earth Orbit (LEO) satellite constellations offer unprecedented opportunities for global broadband connectivity but pose significant beamforming challenges due to rapid platform motion and stringent onboard hardware constraints. Fully digital architectures, while optimal in theory, remain impractical for satellite payloads, motivating ...
Mohammad Momani, Thomas Delamotte, Andreas Knopp   +2 more
wiley   +1 more source

Hybrid antenna array for mmWave massive MIMO

, 2017
© 2017 Elsevier Inc. All rights reserved. This chapter introduces the massive hybrid array architecture, where antenna elements are grouped into multiple analog subarrays, and a single digital signal is received from or sent to each subarray. It provides
Dyadyuk, V, Guo, YJ, Huang, X, V. Dyadyuk, J.A. Zhang, Zhang, JA, X. Huang, Y. Jay Guo   +7 more
core   +2 more sources