Results 31 to 40 of about 54,691 (254)
Mobility-aware pilot assignment for UAV-only CF-mMIMO networks
ICT ExpressUnmanned aerial vehicles (UAVs) introduce severe pilot contamination challenges in cell-free massive multiple-input multiple-output (CF-mMIMO) networks due to high mobility and rapidly varying channel conditions.
Haider Salih Mahdi, Jafar Pourrostam
doaj +1 more source
Pilot Assignment Schemes for Cell-Free Massive MIMO Systems
CoRR, 2021 In this work, we propose three pilot assignment schemes to reduce the effect of pilot contamination in cell-free massive multiple-input-multiple-output (MIMO) systems. Our first algorithm, which is based on the idea of random sequential adsorption (RSA) process from the statistical physics literature, can be implemented in a distributed and scalable ...
Priyabrata Parida, Harpreet S. Dhillon
openaire +2 more sources
IET Communications, 2021 In cell‐free massive multiple‐input‐multiple‐output (CF‐MMIMO) systems, a massive number of access points, mastered by central processing units are distributed in a coverage area to serve much smaller number of user equipments (UEs) simultaneously over ...
Wafa Haj Hmida +3 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Japan's 2024 physician work‐style reform introduced legally binding limits on physicians’ working hours, but its impact on education and workforce sustainability in pediatric hematology–oncology (PHO) remains unclear. Procedure We conducted a repeated cross‐sectional study with structured quantitative items and free‐text responses ...
Kiyohiko Kaizu +7 more
wiley +1 more source
Location-Aware Channel Estimation Enhanced TDD Based Massive MIMO
IEEE Access, 2016 Pilot contamination (PC) is a stumbling block in theway of realizing massive multi-input multi-output (MIMO) systems. This contribution proposes a location-aware channel estimation-enhanced massive MIMO system employing time-division duplexing protocol ...
Zhaocheng Wang +3 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Embryonal tumors comprise the majority of malignant central nervous system (CNS) neoplasms diagnosed in children under 3 years of age. Compared with their counterparts in older children, these tumors exhibit distinct molecular biology and a more aggressive clinical phenotype, while their management is complicated by the heightened ...
Sudarshawn Damodharan +3 more
wiley +1 more source
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Background Chronic micro‐inflammation in patients with end‐stage renal disease (ESRD) is a significant driver of cardiovascular complications and diminished quality of life. While standard hemodialysis (SHD) effectively manages small‐molecule clearance, its ability to remove medium‐to‐large uremic toxins—the primary catalysts of systemic ...
Hongwei Zuo +5 more
wiley +1 more source
Dynamic pilot assignment in massive MIMO system based on user classification
Dianxin kexue, 2017 Aiming at the problem of pilot contamination in massive MIMO system,a dynamic pilot assignment strategy based on user classification was proposed.The target cell user was divided into the central user and the edge user based on the variance of target ...
Jinyan ZHANG, Feng JIN, Lixin YIN
doaj +2 more sources
EURASIP Journal on Wireless Communications and NetworkingPilot contamination is a serious issue in massive multi–input–multi–output systems which significantly degrades system performance. In this paper, we investigate a new pilot assignment scheme by integrating two-dimensional genetic algorithm with Tabu ...
Haftom Tesfay Gidena +1 more
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FEBS Letters, EarlyView.Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho +3 more
wiley +1 more source