0000000000588012

AUTHOR

Ju Liu

showing 3 related works from this author

Joint Spectral and Energy Efficiency Optimization for Downlink NOMA Networks

2020

Non-orthogonal multiple access (NOMA) holds the promise to be a key enabler of 5G communication. However, the existing design of NOMA systems must be optimized to achieve maximum rate while using minimum transmit power. To do so, this paper provides a novel technique based on multi-objective optimization to efficiently allocate resources in the multi-user NOMA systems supporting downlink transmission. Specifically, our unique optimization technique jointly improves spectrum and energy efficiency while satisfying the constraints on users quality of services (QoS) requirements, transmit power budget and successive interference cancellation. We first formulate a joint problem for spectrum and …

OptimizationMathematical optimizationComputer Networks and CommunicationsComputer scienceenergiatehokkuus5G-tekniikka02 engineering and technologySilicon carbideMulti-objective optimizationNomalangaton tiedonsiirto0203 mechanical engineeringoptimointiPower system managementQuality of serviceArtificial IntelligenceTelecommunications link0202 electrical engineering electronic engineering information engineeringmedicineSpectral efficiencyDownlinkResource managementNOMA020302 automobile design & engineering020206 networking & telecommunicationsSpectral efficiencyTransmitter power outputmedicine.diseaseMulti-objective optimizationEnergy efficiencySingle antenna interference cancellationHardware and ArchitectureNon-orthogonal multiple accessBenchmark (computing)QoS.Efficient energy use
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Efficient Power Allocation for Multi-Cell Uplink NOMA Network

2019

Digital technologies are rapidly shaping the modern concepts of urbanization. It is a key element of developing practical smart cities of the future. In fact, they are the catalyst for the increasing networking of all areas of life in a smart city. Recent development in the domain of communication technologies has opened new avenues to realize the concept of smart cities. One of such communication technology is non-orthogonal multiple access (NOMA) for future cellular communications. This article, therefore, focuses on the interference management of uplink cellular NOMA systems. Specifically, we propose a power optimization technique for NOMA to improve the sum-rate in a multi-cell environm…

energiatehokkuusComputer science5G-tekniikkamatkaviestinverkot02 engineering and technologyNomaoptimointi0203 mechanical engineeringSmart cityTelecommunications link0202 electrical engineering electronic engineering information engineeringmedicineMulti-cellSmart citybusiness.industryPower optimization020206 networking & telecommunications020302 automobile design & engineeringNakagami distributionmedicine.diseasePower optimizationCellular communicationNon-orthogonal multiple access (NOMA)Key (cryptography)älytekniikkaNakagami-mbusinessComputer networkCommunication channel2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)
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Secrecy analysis and learning-based optimization of cooperative NOMA SWIPT systems

2019

Non-orthogonal multiple access (NOMA) is considered to be one of the best candidates for future networks due to its ability to serve multiple users using the same resource block. Although early studies have focused on transmission reliability and energy efficiency, recent works are considering cooperation among the nodes. The cooperative NOMA techniques allow the user with a better channel (near user) to act as a relay between the source and the user experiencing poor channel (far user). This paper considers the link security aspect of energy harvesting cooperative NOMA users. In particular, the near user applies the decode-and-forward (DF) protocol for relaying the message of the source no…

Signal Processing (eess.SP)FOS: Computer and information sciencesComputer scienceDecode-and-forward (DF)050801 communication & media studies5G-tekniikkalaw.inventionNonorthogonal multiple access (NOMA)NomaComputer Science - Networking and Internet Architecturelangaton tiedonsiirto0508 media and communicationsoptimointiRelaylawRobustness (computer science)0502 economics and businessSecrecymedicineFOS: Electrical engineering electronic engineering information engineeringElectrical Engineering and Systems Science - Signal ProcessingtietoturvaNetworking and Internet Architecture (cs.NI)business.industryDeep learningPower-splitting05 social sciencesDeep learningmedicine.diseasekoneoppiminen050211 marketingArtificial intelligencebusinessDecoding methodsEfficient energy useComputer networkCommunication channel
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