Results 71 to 80 of about 41,333 (196)

mmWave Massive MIMO with Simple RF and Appropriate DSP

, 2017
There is considerable interest in the combined use of millimeter-wave (mmwave) frequencies and arrays of massive numbers of antennas (massive MIMO) for next-generation wireless communications systems.
Mezghani, Amine, Swindlehurst, A. Lee
core   +1 more source

Taxonomy of IMT Interference on Aeronautical Systems

Radio Science, Volume 61, Issue 4, April 2026.
Abstract The rapid deployment of 5G and future 6G networks has raised concerns about interference with critical aeronautical systems, particularly radio altimeters and Wireless Avionics Intra‐Communications (WAIC). This paper offers a comprehensive taxonomy of the 5G/6G signal interference mechanisms, operational impacts, and mitigation strategies in ...
Valéria C. M. N. Leite, Alison Moraes
wiley   +1 more source

Massive MIMO Communications

, 2016
Every new network generation needs to make a leap in area data throughput, to manage the growing wireless data traffic. The Massive MIMO technologycan bring at least ten-fold improvements in area throughput by increasing the spec-tral efficiency (bit/s/Hz/cell), while using the same bandwidth and density of basestations as in current networks.
Van Chien, Trinh, Björnson, Emil
openaire   +3 more sources

Massive MIMO User Location Based Pilot Allocation in Massive MIMO Systems

International Journal of Innovative Technology and Exploring Engineering, 2020
Aiming at the problem of massive MIMO pilot contamination, a user location information based pilot allocation scheme is proposed. The proposed scheme sorts the users and assigns pilots in accordance to the polar angle of the user's location in the polar coordinate system with the base station of the cell as the pole.
Shivaprasad Martha*, Dr. Sandeep Kumar V*   +1 more
openaire   +1 more source

Low-power transmission method for uplink millimeter-wave massive MIMO-NOMA system based on GSIC

Dianxin kexue, 2023
The combination of non-orthogonal multiple access (NOMA) and millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) can meet the requirements for huge throughput and massive connectivity in future wireless communication network.The total ...
Hui WANG, Qixin TAI, Liu LIU, Hong WANG, Rongfang SONG   +4 more
doaj   +2 more sources

Channel Estimation for mmWave Massive MIMO Based Access and Backhaul in Ultra-Dense Network

, 2016
Millimeter-wave (mmWave) massive MIMO used for access and backhaul in ultra-dense network (UDN) has been considered as the promising 5G technique. We consider such an heterogeneous network (HetNet) that ultra-dense small base stations (BSs) exploit ...
Dai, Linglong, Gao, Zhen, Wang, Zhaocheng   +2 more
core   +1 more source

Engineered Optical Fibers for Deep‐Tissue Applications

Advanced Optical Materials, Volume 14, Issue 10, 13 March 2026.
This review establishes a foundational framework for designing optical fibers for deep‐tissue medicine. It systematically links material innovations like polymers and hydrogels with structural paradigms to enable state‐of‐the‐art diagnostics, including endoscopy and biosensing, and targeted therapeutics, guiding future clinical translation.
Yuzhen Li, Siyang Zheng, Wenzhao Li, Kai Chen, Tianting Zhong, Chi Man Woo, Weiran Pang, Chuqi Yuan, Xiaozhou Xiao, Xianguang Yang, Long Jin, Xiang Qian, Qiyao Tan, Changyuan Yu, Liwei Liu, Junle Qu, Puxiang Lai   +16 more
wiley   +1 more source

Conjugate Gradient-based Soft-Output Detection and Precoding in Massive MIMO Systems

, 2014
Massive multiple-input multiple-output (MIMO) promises improved spectral efficiency, coverage, and range, compared to conventional (small-scale) MIMO wireless systems.
Cavallaro, Joseph R., Studer, Christoph, Wu, Michael, Yin, Bei   +3 more
core   +1 more source

First Coincident Radar and Optical Observations of a Meteor Radio Afterglow

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract It has been hypothesized that Meteor Radio Afterglows (MRAs) occur due to resonant transition radiation (RTR) where suprathermal electrons emit as they pass through electron density inhomogeneities in a turbulent plasma. Meteor trails are thought to produce suprathermal electrons through anion oxidation, which can be identified through meteor ...
K. S. Obenberger, J. L. Chau, J. Vierinen, D. Vida, L. E. Cordonnier, Z. Balint, M. Clahsen, E. Dao, J. Dowell, J. M. Holmes, R. F. Kelly, D. Kastinen, N. Pfeffer, K. Robinson, G. B. Taylor, J. M. Urco   +15 more
wiley   +1 more source

Advanced Quantizer Designs for FDD-Based FD-MIMO Systems Using Uniform Planar Arrays

, 2018
Massive multiple-input multiple-output (MIMO) systems, which utilize a large number of antennas at the base station, are expected to enhance network throughput by enabling improved multiuser MIMO techniques.
Choi, Junil, Kim, Taeyoung, Love, David J., Song, Jiho   +3 more
core   +1 more source