Resource Allocation for OFDMA Systems

140 Pages·2020·3.719 MB·English

by  Chen Chen, Xiang Cheng

Wireless Networks
Chen Chen
Xiang Cheng
Resource
Allocation
for OFDMA
Systems
Wireless Networks
Serieseditor
XueminShermanShen
UniversityofWaterloo,Waterloo,ON,Canada
Moreinformationaboutthisseriesathttp://www.springer.com/series/14180
(cid:129)
Chen Chen Xiang Cheng
Resource Allocation
for OFDMA Systems
ChenChen XiangCheng
SchoolofElectronicsEngineering SchoolofElectronicsEngineering
&Comp PekingUniversity
PekingUniversity Beijing,China
Beijing,China
ISSN2366-1186 ISSN2366-1445 (electronic)
WirelessNetworks
ISBN978-3-030-19391-1 ISBN978-3-030-19392-8 (eBook)
https://doi.org/10.1007/978-3-030-19392-8
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Preface
This book investigates and surveys resource allocation techniques for MIMO-
OFDMA systems. The radio resources of traditional communication systems are
definedanddistributedinahierarchicalstructure.However,duetothespace,time,
and frequency variations and randomness of next-generation wireless communica-
tion systems, the traditional hierarchical allocation methods cannot optimize them.
Therefore, people pay more attention to cross-layer wireless resource allocation
technologies today, so as to achieve joint scheduling and optimization of system
space, time, and frequency resources. As several important wireless resources, the
rational use and distribution of users, power, and spectrum resources play an
extremelycrucialroleinensuringcommunicationqualityandimprovingcommuni-
cationperformance.
This book first introduces the sources and historic collection campaigns of
resourceallocationinwirelesscommunicationsystems.Secondly,theuniquechar-
acteristicsofMIMO-OFDMAsystemswillbethoroughlystudiedandsummarized.
Thirdly, remarks on resource allocation and spectrum sharing will be presented,
which demonstrate thegreat value ofresource allocation techniquesbut also intro-
duce distinct challenges of resource allocation in MIMO-OFDMA systems.
Fourthly, novel resource allocation techniques for OFDMA Systems will be sur-
veyedfromvariousapplications(e.g.,forunicast,ormulticastwithGuaranteedBER
and Rate, subcarrier and power allocation with various detectors, low-complexity
energy-efficientresourceallocation,etc.).Duetothehighmobilityandlowlatency
requirements of 5G wireless communications, this book will discuss how to deal
with the imperfect CSI, e.g., throughput maximization, outage probabilities maxi-
mizationandguarantee,energyefficiency,physical-layersecurityissueswithfeed-
back channel capacity constraints, in order to characterize and understand the
applications of practical scenes. Finally, the challenges and open opportunities of
v
vi Preface
resourceallocation inMIMO-OFDMA will be broadlyinvestigated andconcluded
in terms of communications, networking, and energy efficiency, as well as the
securityissuesofprivate-sensitivescenes.
Beijing,China ChenChen
XiangCheng
Acknowledgements
This work was supported in part by the Ministry National Key Research and
Development Project under Grant 2017YFE0121400, the National Science and
Technology Major Project under Grant 2018ZX03001031, and the Major Project
from Beijing Municipal Science and Technology Commission under Grant
Z181100003218007.
vii
Contents
1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 OFDM/OFDMATechnology. .. . . . . . . . . . . .. . . . . . . . . . .. . 1
1.2 RadioResourceAllocationTechnology. . . . . . . . . . . . . . . . . . . 2
1.3 TheOrganizationalStructure. . . . . . . . . . . . . . . . . . . . . . . . . . . 4
References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 OverviewofOFDMAandMIMOSystems. . . . . . . . . . . . . . . . . . . . 7
2.1 Review. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 ChannelCharacteristicsofMobileCommunication. . . . . . . . . . . 8
2.2.1 Large-ScaleFading. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2.2 MesoscaleDecline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2.3 Small-ScaleDecline. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2.4 ChannelInterference. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 MultiuserMIMO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3.1 SignalDetectionMethod. . . . . . . . . . . . . . . . . . . . . . . . 13
2.3.2 Single-UserSelection. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3.3 MultiuserSelection. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.4 OFDMASystem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.4.1 OFDMPrinciple. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.4.2 UnicastandMulticastOFDMASystems. . . . . . . . . . . . . 19
References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3 RemarksonResourceAllocation. . .. . . .. . . .. . . .. . . .. . . .. . . .. 23
3.1 Review. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.2 DynamicSpectrumSharingModelandMethodOverview. . . . . . 24
3.2.1 Concept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.2.2 DynamicSpectrumSharingMethod
andClassification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.2.3 CurrentResearchHotspot. . . . . . . . . . . . . . . . . . . . . . . . 30
ix
x Contents
3.3 TheTheoryofOFDMASystemResourceAllocation. . . . . . . . . 31
3.3.1 OptimizationTheory. . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3.2 OptimalSolutionAlgorithm. . . . . . . . . . . . . . . . . . . . . . 34
3.3.3 SuboptimalSolutionAlgorithm. . . . .. . . . . . . . . . . . .. . 39
References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4 ResourceAllocationforOFDMASystems. . . . . . . . . . . . . . . . . . . . . 43
4.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.1.1 ResourceAllocationforMulticast
OFDMASystems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.1.2 ResourceAllocationforMIMO-OFDMASystems. . . . . . 44
4.1.3 ResourceAllocationforEnergyEfficiency
inOFDMASystems. . . .. . . . . . .. . . . . . . .. . . . . . . .. 45
4.2 AdaptiveResourceAllocationforMulticastOFDMA
SystemswithGuaranteedBERandRate. . . . . . . . . . . . . . . . . . 46
4.2.1 SystemModelandProblemFormulation. . . . . . . . . . . . . 46
4.2.2 OptimalAlgorithm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.2.3 SuboptimalAlgorithm. . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.2.4 SimulationResults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.2.5 Conclusion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.3 SubcarrierandPowerAllocationforMultiuser
MIMO-OFDMSystemswithVariousDetectors. . . . . . . . . . . . . 58
4.3.1 SystemModelandProblemFormulation. . . . . . . . . . . . . 58
4.3.2 SubcarrierandPowerAllocation. . . . . . . . . . . . . . . . . . . 60
4.3.3 SimulationResults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
4.3.4 Conclusion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.4 Low-ComplexityEnergy-EfficientSubcarrier
AssignmentinUplinkOFDMASystems. . . . . . . . . . . . . . . . . . 70
4.4.1 SystemModelandProblemFormulation. . . . . . . . . . . . . 70
4.4.2 Energy-EfficientSubcarrierAssignment. . . . . . . . . . . . . 71
4.4.3 SimulationResults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
4.4.4 Conclusion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
4.5 Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
5 DealingwithImperfectCSI. . . .. . . . . . . . . . . . .. . . . . . . . . . . . . .. 83
5.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
5.2 ChannelModelwithImperfectCSI. . . . . . . . . . . . . . . . . . . . . . 85
5.2.1 NosieandEstimationError. . . . . . . . . . . . . . . . . . . . . . . 85
5.2.2 CSIFeedbackDelay. . . . . . . . . . . . . . . . . . . . . . . . . . . 86
5.2.3 Finite-RateFeedbackofDownlinkCSI. . . . . . . . . . . . . . 88
5.3 DownlinkErgodicThroughputMaximization
forOFDMASystemswithFeedbackChannelCapacity
Constraints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
5.3.1 ProblemFormulation. . . . . . . . . . . . . . . . . . . . . . . . . . . 90