Results 1 to 10 of about 482,239 (119)

Determination of Effective Mode Selection for Ensuring Spectrum Efficiency with Massive MIMO in IoT Systems [PDF]

open access: yesSensors, 2019
Wireless Sensor Networks (WSNs) based on Internet of Things (IoT) applications are increasing day by day. These applications include healthcare, infrastructure monitoring, smart homes, wearable devices and smart cars.
Osman Dikmen, Selman KulaƧ
doaj   +2 more sources

Spectrum-Efficient User and Qos-Aware Resource Allocation With Enhanced Uplink Transmission in U-LTE Networks Co-Occurrence With Wi-Fi by CRN

open access: yesIEEE Access, 2023
Unlicensed Long-Term Evolution (U-LTE) is one of the few scientific fields that allow illegitimate access to the 5GHz band to boost data transmission throughput. However, the overall client-perceived Quality-of-Service (QoS) was not improved. This has an
P. B. Pankajavalli   +2 more
doaj   +1 more source

Performance evaluation of MIMO DFT-Spread WR-OFDM system for spectrum efficiency and power efficiency

open access: yesJournal of Information and Telecommunication, 2022
It is important to design a spectrum-efficient and power-efficient wireless communication system, which is the main design target in cellular and wireless communication engineering.
Md. Najmul Hossain
doaj   +1 more source

Joint DL/UL Decouple User Association in Microwave and mmWave Enabled Beyond 5G Heterogeneous Networks

open access: yesIEEE Access, 2021
Beyond fifth-generation (5G) heterogeneous networks (HetNets) are facing the challenge of accommodating enormous mobile users and data traffic with scarce spectrum resources in the microWave ( $\mu $ Wave) band.
Humayun Zubair Khan   +5 more
doaj   +1 more source

Experimental Study of Simplified UTW-OFDM Receiver Technology for Application to 5G Using Software-Defined Radio Platform

open access: yesIEEE Open Journal of Vehicular Technology, 2023
The simplified universal time-domain windowed-orthogonal frequency-division multiplexing (Simplified UTW-OFDM) has been proposed to improve spectral efficiency. This study proposed a novel receiving method using an optimal inter-carrier interference (ICI)
Yuu Ichikawa   +2 more
doaj   +1 more source

The Application Research of Atmospheric Optical Communication in Joint Modulation Transmission System

open access: yesGuangtongxin yanjiu, 2021
Aiming at the demand of high spectrum efficiency and low bit error rate of Wireless Optical Communication (WOC) technology, a joint modulation method of Pulse Amplitude Modulation (PAM) and Pulse Position Modulation (PPM) is proposed.
Le-kun DENG   +3 more
doaj   +1 more source

Adaptive Modulation Method of EON based on Deep Neural Network

open access: yesGuangtongxin yanjiu, 2021
In order to maximize the total spectrum efficiency and improve the Quality of Experience (QoE) on Elastic Optical Network (EON), an adaptive modulation method based on Deep Neural Network (DNN) is proposed.
Jian-hua WANG, Yu-kun RAN, Jie ZHAO
doaj   +1 more source

Time Switching Based Wireless Powered Relay Transmission with Uplink NOMA

open access: yesSensors, 2021
Non-orthogonal multiple access (NOMA) utilizes power domain multiplexing to improve spectrum efficiency compared with orthogonal multiple access (OMA). In the Internet of Things (IoT) uplink NOMA networks, if the channel between the far-end node and the ...
Zhihua Lin, Shihua Cao, Jianqing Li
doaj   +1 more source

Joint Resource Allocation for Multiuser Opportunistic Beamforming Systems with OFDM-NOMA

open access: yesEntropy, 2021
Opportunistic beamforming (OBF) is an effective technique to improve the spectrum efficiencies (SEs) of multiple-input-multiple-output (MIMO) systems, which can obtain multiuser diversity gains with both low computation complexity and feedback ...
Wen-Bin Sun   +5 more
doaj   +1 more source

SE and EE Optimization for Cognitive UAV Network Based on Location Information

open access: yesIEEE Access, 2019
Unmanned Aerial Vehicle (UAV) aided communication has the potential to provide on-demand wireless services and improve the outdoor link throughput. Applications for UAVs are rapidly growing with the development of Internet of Things.
Hang Hu   +5 more
doaj   +1 more source

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