Results 51 to 60 of about 90,945 (202)

Modeling Analysis for Downlink RIS-UAV-Assisted NOMA over Air-to-Ground Line-of-Sight Rician Channels

Drones
This paper proposes a drone-assisted NOMA communication system equipped with a reconfigurable intelligent surface (RIS). Given the Line-of-Sight nature of the Air-to-Ground link, a more realistic Rician fading environment is chosen for the study of ...
Suoping Li, Xiangyu Liu, Jaafar Gaber, Guodong Pan   +3 more
doaj   +1 more source

Downlink Transmission of Multicell Distributed Massive MIMO With Pilot Contamination Under Rician Fading

IEEE Access, 2020
In this paper, we investigate the spectral efficiency (SE) of a multicell downlink (DL) distributed massive MIMO (DM-MIMO) system with pilot contamination operating over Rician fading channels in which each remote access unit (RAU) is equipped with a ...
Meng Wang, Dian-Wu Yue, Si-Nian Jin
doaj   +1 more source

A Multiscale Spatiotemporal Causal Mapping Algorithm for Revealing Neural Network Mechanisms of Transcutaneous Auricular Vagus Nerve Stimulation

Human Brain Mapping, Volume 47, Issue 11, 01 August 2026.
In this study, we propose a multiscale spatiotemporal causal mapping (MSTCM) algorithm integrating multiscale functional connectivity and delay‐aware causal inference. Applied to resting‐state fMRI data, MSTCM reveals that taVNS reorganizes large‐scale brain networks by enhancing global integration efficiency while shifting information processing from ...
Weiyi Wang, Ruimin Wang, Pan Lin, Yue Leng, Tianqi Huang, Sheng Ge   +5 more
wiley   +1 more source

Self‐Supervised Deep Learning Framework for Rician Distribution Based Denoising and Modeling of Multi‐b Prostate Diffusion MRI

Magnetic Resonance in Medicine, Volume 96, Issue 2, Page 928-942, August 2026.
ABSTRACT Purpose Convolutional neural networks (CNNs) are evaluated for improved and accelerated denoising and Rician bias correction in multi‐b DW images with simultaneous signal modeling. Methods Prostate diffusion images from 46 individuals acquired at 20 linearly distributed b‐values (bmax=2000s/mm2) without averaging were used for self‐supervised ...
Mustafa Abbas, Wenyin Zhou, Stephan E. Maier, Fredrik Langkilde, Stefan Kuczera   +4 more
wiley   +1 more source

Performance Analysis of Multi-Antenna Multiuser Hybrid Satellite-Terrestrial Relay Systems for Mobile Services Delivery

IEEE Access, 2018
Satellite communication systems need to be integrated with emerging cooperative relaying techniques to provide seamless connectivity and high-speed broadband access for mobile users in future wireless networks.
Vinay Bankey, Prabhat K. Upadhyay, Daniel Benevides Da Costa, Petros S. Bithas, Athanasios G. Kanatas, Ugo Silva Dias   +5 more
doaj   +1 more source

Large-Scale Fading Precoding for Spatially Correlated Rician Fading with Phase Shifts

CoRR, 2020
We consider large-scale fading precoding (LSFP), which is a two-layer precoding scheme in the downlink of multi-cell massive MIMO (multiple-input multiple-output) systems to suppress inter-cell interference. We obtain the closed-form spectral efficiency (SE) with LSFP at the central network controller and maximum ratio precoding at the base stations ...
Özlem Tugfe Demir, Emil Björnson
openaire   +3 more sources

Location Verification Systems for VANETs in Rician Fading Channels [PDF]

IEEE Transactions on Vehicular Technology, 2016
In this work we propose and examine Location Verification Systems (LVSs) for Vehicular Ad Hoc Networks (VANETs) in the realistic setting of Rician fading channels. In our LVSs, a single authorized Base Station (BS) equipped with multiple antennas aims to detect a malicious vehicle that is spoofing its claimed location.
Shihao Yan, Robert A. Malaney, Ido Nevat, Gareth W. Peters   +3 more
openaire   +4 more sources

HELIOS ‐ Highly rEliable Links durIng sOlar conjunctionS

Radio Science, Volume 61, Issue 8, August 2026.
Abstract During deep space missions, maintaining reliable communication between a spacecraft and Earth becomes particularly challenging during superior solar conjunctions, when the spacecraft passes behind the Sun relative to Earth. The highly ionized solar corona and solar wind create plasma inhomogeneities that severely affect radio signals, leading ...
A. Zeqaj, P. Tortora, E. Paolini, A. J. Stocker, D. R. Siddle, A. Argyriou, J. De Vicente, R. Abello, M. Mercolino   +8 more
wiley   +1 more source

Toward an efficiently computable formula for the output statistics of MIMO block-fading channels [PDF]

, 2013
The information that can be conveyed through a wireless channel, with multiple-antenna equipped transmitter and receiver, crucially depends on the channel behavior as well as on the input structure.
Alfano, Giuseppa, Chiasserini, Carla Fabiana, Nordio, Alessandro, Zhou, Siyuan   +3 more
core  

A Unified Approach to the Analysis of Multicarrier DS-CDMA over Nakagami-$M$ Fading Channels

, 2001
A class of unified multicarrier DS-CDMA (MC DS-CDMA) schemes is defined and its performance is considered over multipath Nakagami-$M$ fading channels. The spacing between two adjacent subcarriers of the unified MC DS-CDMA scheme is a variable, allowing ...
Yang, L-L., Hanzo, L.
core   +1 more source