Results 51 to 60 of about 382,107 (168)

On Downlink NOMA in Heterogeneous Networks With Non-Uniform Small Cell Deployment

IEEE Access, 2018
Compared to orthogonal multiple access (OMA), non-orthogonal multiple access (NOMA) can achieve higher spectral efficiency by exploiting the power domain multiplexing.
Tao Han, Jie Gong, Xiong Liu, S. M. Riazul Islam, Qiang Li, Zhiquan Bai, Kyung Sup Kwak   +6 more
doaj   +1 more source

Coverage Analysis of Dynamic Coordinated Beamforming for LEO Satellite Downlink Networks [PDF]

arXiv, 2023
In this paper, we investigate the coverage performance of downlink satellite networks employing dynamic coordinated beamforming. Our approach involves modeling the spatial arrangement of satellites and users using Poisson point processes situated on concentric spheres.
arxiv  

Multi-Connectivity Between Terrestrial and Non-Terrestrial MIMO Systems

IEEE Open Journal of the Communications Society
Communicating in a non-terrestrial network (NTN) has recently emerged as a promising technology to provide global seamless connectivity. Although low earth orbit (LEO) satellites in an NTN have been employed for providing ubiquitous coverage and high ...
Bodong Shang, Xiangyu Li, Zhuhang Li, Junchao Ma, Xiaoli Chu, Pingzhi Fan   +5 more
doaj   +1 more source

Coverage and Rate Analysis in Heterogeneous Cloud Radio Access Networks With Device-to-Device Communication

IEEE Access, 2016
The implementation of heterogeneous cloud radio access network (H-CRAN) architecture is faced with practical challenges, such as the capacity and time-delay limitations of the fronthaul links.
Munzali Ahmed Abana, Mugen Peng, Zhongyuan Zhao, Lukman A. Olawoyin   +3 more
doaj   +1 more source

Iteratively Reweighted Least Squares Fiducial Interval for Variance in Unbalanced Variance Components Model

Mathematics
The objective of this work is to propose the iteratively reweighted least squares concept to form a fiducial generalized pivotal quantity of the between-group variance component for the unbalanced variance components model.
Arisa Jiratampradab, Jiraphan Suntornchost, Thidaporn Supapakorn   +2 more
doaj   +1 more source

The variable for the generalized confidence interval for the lognormal mean [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2008
The purpose of this paper is to propose a new variable for the generalized confidence interval method to estimate the confidence interval of the lognormal mean.
Thongkam Maiklad
doaj  

Generalized confidence interval for the common coefficient of variation of several zero-inflated Birnbaum-Saunders distributions with an application to wind speed data

AIMS Mathematics
Wind speed is a critical factor that affects various aspects of life in Thailand, particularly agriculture, which is a fundamental component of the Thai economy.
Usanee Janthasuwan, Suparat Niwitpong, Sa-Aat Niwitpong   +2 more
doaj   +1 more source

User-Centric Interference Nulling in Downlink Multi-Antenna Heterogeneous Networks [PDF]

arXiv, 2016
In heterogeneous networks (HetNets), strong interference due to spectrum reuse affects each user's signal-to-interference ratio (SIR), and hence is one limiting factor of network performance. In this paper, we propose a user-centric interference nulling (IN) scheme in a downlink large-scale HetNet to improve coverage/outage probability by improving ...
arxiv  

Coverage Performance of Aerial-Terrestrial HetNets [PDF]

IEEE VTC 2019, 2019
Providing seamless coverage under current cellular network technologies is surmountable only through gross overengineering. Alternatively, as an economically effective solution, the use of unmanned aerial vehicles (UAVs), augmented with the functionalities of terrestrial base stations (BSs), is recently advocated.
arxiv  

Coverage in Heterogeneous Downlink Millimeter Wave Cellular Networks [PDF]

arXiv, 2016
In this paper, we provide an analytical framework to analyze heterogeneous downlink mmWave cellular networks consisting of K tiers of randomly located base stations (BSs) where each tier operates in a mmWave frequency band. Signal-to-interference-plus-noise ratio (SINR) coverage probability is derived for the entire network using tools from stochastic ...
arxiv