Results 181 to 190 of about 10,122 (257)

Joint Subchannel and Power Allocation for Energy Efficiency Optimization in NOMA Heterogeneous Networks With Energy Harvesting

IEEE Systems Journal, 2022
Nonorthogonal multiple access (NOMA) in heterogeneous networks (HetNets) can effectively improve data rate and spectral utilization by allowing multiple users to share the same channel.
Hailin Xiao, Wenqian Zhang, A. Chronopoulos   +2 more
semanticscholar   +1 more source

Energy-Efficient Resource Allocation and Subchannel Assignment for NOMA-Enabled Multiaccess Edge Computing

IEEE Systems Journal, 2021
In this article, we study an energy-efficient nonorthogonal multiple access (NOMA) enabled multiaccess edge computing (MEC) system with strict latency requirements.
Lina Liu, Bo Sun, Xiaoqi Tan, D. Tsang
semanticscholar   +1 more source

Energy Efficient Subchannel and Power Allocation in Cooperative VLC Systems

IEEE Communications Letters, 2021
This letter studies the energy efficiency (EE) optimization of cooperative visible light communication (VLC) systems while considering the inter-cell interference and the lineof-sight blockage problems.
Sylvester B. Aboagye, T. Ngatched, O. Dobre, A. G. Armada   +3 more
semanticscholar   +1 more source

Computational assessment of thermo-hydraulic performance of Al2O3-water nanofluid in hexagonal rod-bundles subchannel

, 2021
This study investigated alumina nanofluid's thermo-hydraulic performance as a coolant in the subchannel geometry of a hexagonal rod-bundle reactor core using the computational fluid dynamics (CFD) tools.
Farid Ahmed, M. A. Abir, P. Bhowmik, V. Deshpande, A. Mollah, Dinesh Kumar, S. Alam   +6 more
semanticscholar   +1 more source

Experimental Investigation of the Subchannel Axial Pressure Drop and Hydraulic Characteristics of a 61-Pin Wire Wrapped Rod Bundle

Journal of Fluids Engineering, 2021
Wire-wrapped hexagonal fuel bundles have been extensively investigated due to their enhanced heat transfer and flow characteristics. Experimental measurements are important to study the thermal-hydraulic behavior of such assemblies and to validate and ...
Craig Menezes, R. Vaghetto, Y. Hassan
semanticscholar   +1 more source

Subchannel Assignment and Power Allocation for Time-Varying Fog Radio Access Network With NOMA

IEEE Transactions on Wireless Communications, 2021
To satisfy future wireless network’s requirements of huge capacity, ultra low delay and supermassive connectivity, it is urgent to study novel wireless communication network architecture and technology.
Yu Qiu, Haijun Zhang, Keping Long, M. Guizani   +3 more
semanticscholar   +1 more source

Quantifying the Diversity of OFDMA Subchannels

2007 IEEE Wireless Communications and Networking Conference, 2007
Orthogonal frequency division multiple access (OFDMA) has been chosen as the radio transmission technology for future 4G wireless networks. One important reason for this choice is that OFDMA offers various forms of diversity (time, frequency, space, etc).
Patrick Hosein, Jung-Woon Lee
openaire   +1 more source

Joint Energy Efficient Subchannel and Power Optimization for a Downlink NOMA Heterogeneous Network

IEEE Transactions on Vehicular Technology, 2019
Non-orthogonal multiple access (NOMA) has been considered as a key technology in the fifth-generation mobile communication networks due to its superior spectrum efficiency. Since the heterogeneous network has been emerged to satisfy users’ explosive data
Fang Fang, Julian Cheng, Z. Ding
semanticscholar   +1 more source

Subchannel assignment in OFDM relay nodes

2006 40th Annual Conference on Information Sciences and Systems, 2006
The paper considers a source-relay-destination link in which the relay node is allowed to reassign the input subchannels to different output subchannels. In particular, we consider a channel-aware relay node and compute the subchannel reassignment that optimizes a selected performance criterion.
Ari Hottinen, Tiina Heikkinen
openaire   +1 more source

Subchannel and resource allocation in cognitive radio sensor network with wireless energy harvesting

Comput. Networks, 2020
Cognitive Radio Sensor Network (CRSN) is a promising network architecture which integrates the advantages of cognitive radio and sensor networks. In this paper, the CRSN with spectrum leasing mode is considered.
Zhixin Liu, M. Zhao, Yazhou Yuan, X. Guan   +3 more
semanticscholar   +1 more source