Results 41 to 50 of about 86,321 (187)

System-Level Study of Data Duplication Enhancements for 5G Downlink URLLC

IEEE Access, 2020
Data duplication is studied as a fundamental enabler for ultra-reliable low-latency communication (URLLC) in fifth-generation cellular systems. It entails the simultaneous usage of multiple radio links delivering redundant data between a terminal and the
Marco Centenaro, Daniela Laselva, Jens Steiner, Klaus Pedersen, Preben Mogensen   +4 more
doaj   +1 more source

Analysis of Hierarchical Rate Splitting for Intelligent Reflecting Surfaces-Aided Downlink Multiuser MISO Communications

IEEE Open Journal of the Communications Society, 2021
An intelligent reflecting surface (IRS) is an emerging technology in the next-generation (B5G and 6G) wireless communications with the aim of improving the spectral/energy efficiency of the wireless networks. In this paper, we focus on multiple IRS-aided
Ankur Bansal, Keshav Singh, Chih-Peng Li
doaj   +1 more source

Climatology of upper‐tropospheric turbulence: Capabilities and limitations of aircraft reports and ERA5 reanalysis diagnostics

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Based on turbulence diagnostics, airlines are willing to avoid up to 15% of the airspace in order to avoid a fraction of turbulence that takes up about 0.1% of the airspace. This study quantifies these three fractions using turbulence reports from commercial aircraft and ERA5 reanalysis diagnostics, revealing that the low and regionally variable ...
Thorsten Kaluza, Paul D. Williams, David M. Schultz, Timothy P. Banyard   +3 more
wiley   +1 more source

Buffer sharing on an OFDMA downlink

21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2010
In this work we consider the allocation of buffer space to data streams sharing a common high-speed wireless transmitter. As an example, we focus on an OFDMA-based downlink system scenario. Scheduling for maximum throughput has been extensively studied in the literature.
Girici, Tolga, Ozel, Omur, Uysal-Biyikoglu, Elif   +2 more
openaire   +3 more sources

Downlink wireless resource allocation method of V2X based on wireless sensing assistance

Dianxin kexue, 2022
In vehicle-to-everything, the high-speed distribution and sharing of perception and safety data is crucial to road safety.However, the instability of communication links caused by high-speed vehicle movement will make the existing communication resource ...
Zhimin HE, Yuzhe LIN, Yujie CHENG, Shi YAN   +3 more
doaj  

Efficient Downlink Channel Reconstruction for FDD Multi-Antenna Systems [PDF]

, 2018
In this paper, we propose an efficient downlink channel reconstruction scheme for a frequency-division-duplex multi-antenna system by utilizing uplink channel state information combined with limited feedback.
Han, Yu, Hsu, Tien-Hao, Jin, Shi, Wen, Chao-Kai, Wong, Kai-Kit   +4 more
core   +1 more source

Wireless Information and Power Transfer in Full-Duplex Systems with Massive Antenna Arrays

, 2017
We consider a multiuser wireless system with a full-duplex hybrid access point (HAP) that transmits to a set of users in the downlink channel, while receiving data from a set of energy-constrained sensors in the uplink channel.
Chalise, Batu K., Ding, Zhiguo, Mohammadi, Mohammadali, Suraweera, Himal A.   +3 more
core   +1 more source

Linear Precoders for Non-Regenerative Asymmetric Two-way Relaying in Cellular Systems [PDF]

, 2013
Two-way relaying (TWR) reduces the spectral-efficiency loss caused in conventional half-duplex relaying. TWR is possible when two nodes exchange data simultaneously through a relay.
Budhiraja, Rohit, KS, Karthik, Ramamurthi, Bhaskar   +2 more
core   +1 more source

Survey on AI‐Enabled Computer Vision Technologies and Applications for Space Robotic Missions

Journal of Field Robotics, EarlyView.
ABSTRACT This survey provides a comprehensive overview of recent advancements and challenges in Artificial Intelligence (AI)‐enabled computer vision (CV) techniques for space robotic missions, spanning critical phases such as Entry, Descent, and Landing (EDL), orbital operations, and planetary surface exploration.
Maciej Quoos, Steven Kay, Julia Wajoras, Robert Field, Evridiki V. Ntagiou, Fakher Mohammad, Yang Gao   +6 more
wiley   +1 more source

Enhancing Spectral Efficiency of 6G Downlink Beamforming via Cooperative Multi-Agent Deep Reinforcement Learning

Sensors
This paper presents a new beamforming algorithm for Multi-User Multiple-Input Multiple-Output (MU-MIMO) systems using Multi-Agent Reinforcement Learning (MARL).
Ali Al Janaby, Hussain Al-Rizzo, Yahya Qassim   +2 more
doaj   +1 more source