Near-field rainbow: Wideband beam training for XL-MIMO

M Cui, L Dai, Z Wang, S Zhou… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
Wideband extremely large-scale multiple-input-multiple-output (XL-MIMO) plays an
important role in boosting the data rate for 6G networks. Because of the huge bandwidth and …

Machine learning for millimeter wave and terahertz beam management: A survey and open challenges

MQ Khan, A Gaber, P Schulz, G Fettweis - IEEE Access, 2023 - ieeexplore.ieee.org
Next-generation wireless communication networks will benefit from beamforming gain to
utilize higher bandwidths at millimeter wave (mmWave) and terahertz (THz) bands. For high …

Reconfigurable intelligent surfaces for 6G: applications, challenges, and solutions

Y Zhao - Frontiers of Information Technology & Electronic …, 2023 - Springer
Scholars are expected to continue enhancing the depth and breadth of theoretical research
on reconfigurable intelligent surface (RIS) to provide a higher theoretical limit for RIS …

Fast beam training with true-time-delay arrays in wideband millimeter-wave systems

V Boljanovic, H Yan, CC Lin… - … on Circuits and …, 2021 - ieeexplore.ieee.org
The best beam steering directions are estimated through beam training, which is one of the
most important and challenging tasks in millimeter-wave and sub-terahertz communications …

Joint phase-time arrays: A paradigm for frequency-dependent analog beamforming in 6G

VV Ratnam, J Mo, A Alammouri, BL Ng, J Zhang… - IEEE …, 2022 - ieeexplore.ieee.org
Hybrid beamforming is an attractive solution to build cost-effective and energy-efficient
transceivers for millimeter-wave and terahertz systems. However, conventional hybrid …

Multi-mode spatial signal processor with rainbow-like fast beam training and wideband communications using true-time-delay arrays

CC Lin, C Puglisi, V Boljanovic, H Yan… - IEEE Journal of Solid …, 2022 - ieeexplore.ieee.org
Initial access in millimeter-wave (mmW) wireless is critical toward successful realization of
the fifth-generation (5G) wireless networks and beyond. Limited bandwidth in existing …

Rainbow-link: Beam-alignment-free and grant-free mmW multiple access using true-time-delay array

R Li, H Yan, D Cabric - IEEE Journal on Selected Areas in …, 2022 - ieeexplore.ieee.org
The millimeter-wave (mmW) communications is a key enabling technology in 5G to provide
ultra-high throughput. Current mmW technologies rely on analog phased arrays to realize …

Wideband beamforming with rainbow beam training using reconfigurable true-time-delay arrays for millimeter-wave wireless [feature]

CC Lin, V Boljanovic, H Yan, E Ghaderi… - IEEE circuits and …, 2022 - ieeexplore.ieee.org
The decadal research in integrated true-time-delay arrays have seen organic growth
enabling realization of wideband beamformers for large arrays with wide aperture widths …

A 4-element 800MHz-BW 29mW true-time-delay spatial signal processor enabling fast beam-training with data communications

CC Lin, C Puglisi, E Ghaderi… - … 2021-IEEE 47th …, 2021 - ieeexplore.ieee.org
Spatial signal processors (SSP) for emerging millimeter-wave wireless networks are
critically dependent on link discovery. To avoid loss in communication, mobile devices need …

mmflexible: Flexible directional frequency multiplexing for multi-user mmwave networks

IK Jain, RR Vennam, R Subbaraman… - IEEE INFOCOM 2023 …, 2023 - ieeexplore.ieee.org
Modern mmWave systems have limited scalability due to inflexibility in performing frequency
multiplexing. All the frequency components in the signal are beamformed to one direction …