Results 91 to 100 of about 5,110,902 (386)

Channel Estimation in RIS-Enabled mmWave Wireless Systems: A Variational Inference Approach [PDF]

arXiv, 2023
Channel estimation in reconfigurable intelligent surfaces (RIS)-aided systems is crucial for optimal configuration of the RIS and various downstream tasks such as user localization. In RIS-aided systems, channel estimation involves estimating two channels for the user-RIS (UE-RIS) and RIS-base station (RIS-BS) links.
arxiv  

Protonophore activity of short‐chain fatty acids induces their intracellular accumulation and acidification

FEBS Letters, EarlyView.
The protonated form of butyrate, as well as other short‐chain fatty acids (SCFAs), is membrane permeable. In acidic extracellular environments, this can lead to intracellular accumulation of SCFAs and cytosolic acidification. This phenomenon will be particularly relevant in acidic environments such as the large intestine or tumor microenvironments ...
Muwei Jiang, Frans Bianchi, Geert van den Bogaart   +2 more
wiley   +1 more source

An Improved GOMP Sparse Channel Estimation for Vehicle-to-Vehicle Communications

International Journal of Antennas and Propagation, 2023
Reliable channel estimation is critical for wireless communication performance, especially in vehicle-to-vehicle (V2V) communication scenarios. Aiming at the major challenges of channel tracking and estimating as the highly dynamic nature of vehicle ...
Xin Chen, Xudong Zhang, Yaolin Zhu, Ruiqing Ma   +3 more
doaj   +1 more source

Channel Estimation for Reconfigurable Intelligent Surface Aided MISO Communications: From LMMSE to Deep Learning Solutions

IEEE Open Journal of the Communications Society, 2021
We consider multi-antenna wireless systems aided by reconfigurable intelligent surfaces (RIS). RIS presents a new physical layer technology for improving coverage and energy efficiency by intelligently controlling the propagation environment. In practice
Neel Kanth Kundu, M. Mckay
semanticscholar   +1 more source

An Enhanced LMMSE Channel Estimation under High Speed Railway Scenarios

, 2017
With the rapid deployment of the high speed railway (HSR), the wireless communication in HSR has been one of the indispensable scenarios in the fifth generation (5G) communications. In order to improve the performance of the orthogonal frequency division
Li, Yuli, Long, Hang, Tang, Qing, Yang, Haojun   +3 more
core   +1 more source

A comparative study of circulating tumor cell isolation and enumeration technologies in lung cancer

Molecular Oncology, EarlyView.
Lung cancer cells were spiked into donor blood to evaluate the recovery rates of the following circulating tumor cell (CTC) enrichment technologies: CellMag™, EasySep™, RosetteSep™, Parsortix® PR1, and Parsortix® Prototype systems. Each method's advantages and disadvantages are described.
Volga M Saini, Ezgi Oner, Mark P. Ward, Sinead Hurley, Brian David Henderson, Faye Lewis, Stephen P. Finn, Gerard J. Fitzmaurice, John J. O'Leary, Sharon O'Toole, Lorraine O'Driscoll, Kathy Gately   +11 more
wiley   +1 more source

Impulse Noise Mitigation and Channel Estimation Method in OFDM Systems Based on TMSBL

IEEE Access
To address the problem of reduced channel estimation performance in underwater acoustic Orthogonal Frequency Division Multiplexing (OFDM) systems due to impulse noise, a method for impulse noise suppression and underwater acoustic channel estimation ...
Chuanxi Xing, Yanling Ran, Guangzhi Tan, Qiang Meng, Mao Lu   +4 more
doaj   +1 more source

Channel Modelling and Estimation for Shallow Underwater Acoustic OFDM Communication via Simulation Platform

Applied Sciences, 2019
The performance of underwater acoustic (UWA) communication is heavily dependent on channel estimation, which is predominantly researched by simulating UWA channels modelled in complex and dynamic underwater environments.
Xiaoyu Wang, Xiaohua Wang, Rongkun Jiang, Weijiang Wang, Qu Chen, Xinghua Wang   +5 more
doaj   +1 more source

Integrative analysis of circulating tumor cells (CTCs) and exosomes from small‐cell lung cancer (SCLC) patients: a comprehensive approach

Molecular Oncology, EarlyView.
This study simultaneously investigated circulating tumor cells (CTCs) and exosomes from small‐cell lung cancer (SCLC) patients. The elevated expression of JUNB and CXCR4 in CTCs was a poor prognostic factor for SCLC patients, whereas exosomal overexpression of these biomarkers revealed a high discrimination ability of patients from healthy individuals,
Dimitrios Papakonstantinou, Argyro Roumeliotou, Evangelia Pantazaka, Athanasios‐Nasir Shaukat, Athina Christopoulou, Angelos Koutras, Foteinos‐Ioannis Dimitrakopoulos, Vassilis Georgoulias, Anastasia Xagara, Evangelia Chantzara, Fillipos Koinis, Athanasios Kotsakis, Constantinos Stathopoulos, Galatea Kallergi   +13 more
wiley   +1 more source

A Pilot-Based Integration Method of Ranging and LS Channel Estimation for OFDM Systems

Drones, 2022
In the design of unmanned aerial vehicle (UAV) communication systems, orthogonal frequency division multiplexing (OFDM) is a commonly used communication technology.
Bangtao Hu, Xue Li, Linshan Xue
doaj   +1 more source