lte link budget
DESCRIPTION
LTE Link BudgetTRANSCRIPT
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
ITU/BDT Arab Regional Workshop onITU/BDTArab Regional Workshopon4GWirelessSystems
LTETechnology
Session5:LTETechnology PerofrmanceEvaluationEvaluation
Speakers M.Lazhar BELHOUCHETM Hakim EBDELLIM.HakimEBDELLI
Date 27 29January 2010
www.cert.tn1 LTETechnology Perofrmance Evaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
Agenda
FrequencyBandsandTypicaldeploymentareas Layer1PeakBitRates TerminalCategories ReferenceSensitivity LinkBudgets Propagationmodel Uplink link budgetUplinklinkbudget Downlinklinkbudgets ComparisonbetweenGSM/HSPA/LTE Latency LTERefarmingtoGSMSpectrum
i i i i
www.cert.tn2
CapacityDimensioning
LTETechnology Perofrmance Evaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
Introduction
Performanceevaluation:LTEcapabilitiesfromtheendusersandfromtheoperatorspointofviewp p
Theoperatorisinterestedinthenetworkefficiency: howmanycustomerscanbeserved, howmuchdatacanbeprovidedandhowmanybasestationsitesare
required.
Th d li i f d d Theenduserapplicationperformancedependson: availablebitrate, latency and latencyand seamlessmobility
www.cert.tn3 LTETechnology Perofrmance Evaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
FrequencyBands
www.cert.tn4 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
FrequencyBands:Typicaldeploymentareas
Europe: Band7:The2.6GHzauctionshavebeenrunninginafewcountriesduring2007and
2008,andcontinueduring2009/2010.
Band8:iscurrentlyusedmostlybyGSM.Thebandisattractivefromacoveragepointofviewduetothelowerpropagationlosses.ThebandcanbereusedforLTEorforHSPA.
Band3:isalsousedbyGSM,butinmanycasesBand3isnotasheavilyusedbyGSMasBand8.ThatmakesrefarmingforLTEsimpler.
Digitaldividend USA:Bands4,12,13,14and17.Bands2and5canbeusedforLTErefarming. Japan:Bands1,9,11and18. LTEdeploymentsgloballywilluseseveraldifferentfrequencybandsfromthe
start.
www.cert.tn5 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
LTE Technology Perofrmance Evaluation
PERFORMANCEEVALUATIONLTETechnology Perofrmance Evaluation
www.cert.tn6 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
Layer1PeakBitRates
sSubCarrierofNumberHzbits
msSubFramepersymbolsofNumbersMbratebitPeak *)(*
1]/[ =
controlandreferencesignaloverheads: PDCCH:takesonesymboloutof14symbols.ThatistheminimumpossiblePDCCH
allocation The resulting control overhead is 7 1% ( = 1/14)allocation.Theresultingcontroloverheadis7.1%(=1/14).
DownlinkReferenceSignals(RS)dependontheantennaconfiguration:Singlestreamtransmissionuses2RSoutof14inevery3rdsubcarrier,2 2MIMO4symbols and 4 4 MIMO 6 symbols The overhead varies between 4 8% and 14 3%symbolsand4 4MIMO6symbols.Theoverheadvariesbetween4.8%and14.3%.
OtherdownlinksymbolsOverhead:synchronizationsignal,PBCH,PCFICH,andonegroupofPHICH.TheoverheaddependsontheBWrangingfrombelow1%at20MHz to approximately 9% at 1 4 MHzMHztoapproximately9%at1.4MHz.
Uplinkreferencesignalstake1symboloutof7symbolsresultinginanoverheadof14.3%=1/7.
www.cert.tn7 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
Layer1PeakBitRates Cont.
BWRB/Subcarriers
/Modulationandcoding
Bits/symbol
MIMOusage 1.4MHz6/72
3.0MHz15/180
5.0MHz25/300
10MHz50/600
15MHz75/900
20MHz100/1200
QPSK1/2 1 Singlestream 0.9 2.2 3.6 7.2 10.8 14.4
16QAM1/2 2 Singlestream 1.7 4.3 7.2 14.4 21.6 28.8
16QAM3/4 3 Singlestream 2.6 6.5 10.8 21.6 32.4 43.2
64QAM3/4 4.5 Singlestream 3.9 9.7 16.2 32.4 48.6 64.8
64QAM1/1 6 Singlestream 5.2 13.0 21.6 43.2 64.8 86.4
64QAM3/4 9 2 2MIMO 7.8 19.4 32.4 64.8 97.2 129.6
64QAM1/1 12 2 2MIMO 10.4 25.9 43.2 86.4 129.6 172.8Q /
64QAM1/1 24 4 4MIMO 20.7 51.8 86.4 172.8 259.2 345.6
Downlink peak bit rates (Mbps)
www.cert.tn8 LTETechnologyPerofrmanceEvaluation
p ( p )
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
Layer1PeakBitRates Cont.
BWRB/Subcarriers
Modulation Bits/ MIMO usage 1 4 MHz 3 0 MHz 5 0 MHz 10 MHz 15 MHz 20 MHzModulationandcoding
Bits/symbol
MIMOusage 1.4MHz6/72
3.0MHz15/180
5.0MHz25/300
10MHz50/600
15MHz75/900
20MHz100/1200
QPSK1/2 1 Singlestream 0.9 2.2 3.6 7.2 10.8 14.4
16QAM1/2 2 Singlestream 1.7 4.3 7.2 14.4 21.6 28.8
16QAM3/4 3 Singlestream 2.6 6.5 10.8 21.6 32.4 43.2
16QAM 1/1 4 Single stream 3 5 8 6 14 4 28 8 43 2 57 616QAM1/1 4 Singlestream 3.5 8.6 14.4 28.8 43.2 57.6
64QAM3/4 4.5 Singlestream 3.9 9.7 16.2 32.4 48.6 64.8
64QAM1/1 6 Singlestream 5.2 13.0 21.6 43.2 64.8 86.4
Uplink peak bit rates (Mbps)
www.cert.tn9 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
TerminalCategories
Category1 Category2 Category3 Category4 Category5
Peak ratedownlink (approximately) 10Mbps 50Mbps 100Mbps 150Mbps 300Mbps
Peak rateuplink (approximately) 5Mbps 25Mbps 50Mbps 50Mbps 75Mbps
MaxbitsreceivedwithinTTI 10296 51024 102048 149776 299552
MaxbitstransmittedwithinTTI 5160 25456 51024 51024 75376
RFbandwidth 20MHz 20MHz 20MHz 20MHz 20MHz
Modulation downlink 64QAM 64QAM 64QAM 64QAM 64QAMModulationdownlink 64QAM 64QAM 64QAM 64QAM 64QAM
Modulationuplink 16QAM 16QAM 16QAM 16QAM 64QAM
Receiverdiversity Yes Yes Yes Yes Yes
MIMOdownlink Optional 2 2 2 2 2 2 4 4
www.cert.tn10 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
ReferenceSensitivity
Thereferencesensitivitylevelistheminimummean
kTB:thermalnoiselevel,inunitsofdBm,inthespecifiedbandwidth(B),
receivedsignalstrengthappliedtoantennaportsat
NF:noisefigureforthereceiver, SINRisthesignaltointerferenceplus
noise requirement for the chosenwhichthereissufficientSINRforthespecifiedmodulationscheme to meet a minimum
noiserequirementforthechosenmodulationandcodingscheme,
IMistheimplementationmarginschemetomeetaminimumthroughputrequirementof95%ofthemaximum
3dBrepresentsthediversitygain.
possible.)(3Re dBmIMSINRNFKTBfSens +++=
www.cert.tn11 LTETechnology Perofrmance Evaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
ReferenceSensitivity
70.00
EUTRAreferencesensitivity
85.00
80.00
75.00
100.00
95.00
90.00
d
B
m
110.00
105.00
1.4 3 5 10 15 20
BandWidth [MHz]BandWidth[MHz]
QPSK1/8 QPSK1/5 QPSK1/4 QPSK1/3 QPSK1/2
QPSK2/3 QPSK3/4 QPSK4/5 16QAM1/2 16QAM2/3
16QAM3/4 16QAM4/5 64QAM2/3 64QAM3/4 64QAM4/5
www.cert.tn12 LTETechnologyPerofrmanceEvaluation
Q / Q / Q / Q / Q /
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
LinkBudgets
Thelinkbudgetcalculationsestimatethemaximumallowedsignalattenuationbetweenthemobileandthebasestationgantenna.Themaximumpathlossallowsthemaximumcellrangetobeestimatedwithasuitablepropagationmodel.
Thecellrangegivesthenumberofbasestationsitesrequiredtocoverthetargetgeographicalarea.
www.cert.tn13 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
LinkBudgets Propagationmodel
Apropagationmodeldescribestheaveragesignalpropagation,anditconvertsthemaximumallowedp p g ,propagationlosstothemaximumcellrange.
Itdependson: Environment:urban,rural,denseurban,suburban,open,forest,sea Distance Frequency atmosphericconditions Indoor/outdoor Indoor/outdoor
Examples:Freespace,WalfishIkegami,OkumuraHata,LongleyRice,Lee,Young
www.cert.tn14
g y , , g
LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
LinkBudgets PropagationmodelCont.
HataModelforUrbanAreas:)log(*)]log(*556944[)log(*8213)log(*16265569 dhChfLu ++=
Forsmallormediumsizedcity,)log()]log(55.69.44[)log(82.13)log(16.2655.69 dhChfLu BHB ++=
)log(*56.1*)7.0)log(*1.1(8.0 fhfC MH += Forlargecities,
)log(56.1)7.0)log(1.1(8.0 fhfC MH +
200150,1.12))*54.1(log(*29.8 fifhM
=
1500200,97.42))*75.11(log(*2.3200150,1.12))54.1(log(29.8
fifhfifh
CM
MH p
Parameters Unit Significance Parameters Unit SignificanceLu dB PathlossinUrbanAreas f MHz FrequencyofTransmissionhB m HeightofbasestationAntenna CH dB Antenna heightcorrectionfactorhM m HeightofmobilestationAntenna d km DistancebetweenBasestationandMS
www.cert.tn15 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
LinkBudgets PropagationmodelCont.
CoverageevaluationwillbebasedonthetheOk H t ti d l ith thOkumuraHatapropagationmodelwiththeparametersshownbelow:
Urban indoor Suburban indoor Rural outdoor Rural outdoor fixedBasestationantennaheight(m) 30 50 80 80Mobileantennaheight(m) 1.5 1.5 1.5 5Mobileantennagain(dBi) 0 0 0 0Slowfadingstandarddeviation(dB) 8 8 8 8Locationprobability 95% 95% 95% 95%Correctionfactor(dB) 0 5 15 15( )Indoorloss(dB) 20 15 0 0Slowfadingmargin(dB) 8.8 8.8 8.8 8.8
www.cert.tn16 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
UplinklinkbudgetsGSMvoice HSPA LTE
Datarate(kbps) 12.2 64 64Transmitter UE
( )
Source :
LTE for UMTS a Maxtxpower(dBm) 33 23 23b Txantennagain(dBi) 0 0 0c Bodyloss(dB) 3 0 0d EIRP(dBm) 30 23 23
OFDMA and SC-FDMA Based Radio AccessHarri Holma and Antti Toskala
Receiver BTS/NodeB/eNBe NodeBnoisefigure(dB) 2 2f Thermalnoise(dB) 108.2 118.4g Receivernoise(dBm) 106.2 116.4g ( )h SINR(dB) 17.3 7i Receiver sensitivity 114 123.4 123.4j Interferencemargin(dB) 0 3 1k Cable loss (dB) 0 0 0k Cableloss(dB) 0 0 0l Rxantennagain(dBi) 18 18 18m Fast fademargin (dB) 0 1.8 0n Softhandovergain(dB) 0 2 0
M i th l 162 161 6 163 4
www.cert.tn17 LTETechnologyPerofrmanceEvaluation
Maximumpathloss 162 161.6 163.4
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
DownlinklinkbudgetsDownlink GSMvoice HSPA LTEDatarate(kbps) 12.2 1024 1024Transmitter Node B
Source :
LTE for UMTS a Txpower(dBm) 44.5 46 46b Txantennagain(dBi) 18 18 18c Cableloss(dB) 2 2 2d EIRP (dBm) 60 5 62 62
OFDMA and SC-FDMA Based Radio AccessHarri Holma and Antti Toskala
d EIRP(dBm) 60.5 62 62Receiver UE
e UEnoisefigure(dB) 7 7f Thermalnoise(dB) 119.7 108.2 104.5g Receivernoisefloor(dBm) 101.2 97.5h SINR(dB) 5.2 9i Receiversensitivity(dBm) 104 106.4 106.5j Interferencemargin(dB) 0 4 4j g ( )k Controlchanneloverhead(%) 0 20 20l Rxantennagain(dBi) 0 0 0m Bodyloss(dB) 3 0 0
M i th l 161 5 163 4 163 5
www.cert.tn18 LTETechnologyPerofrmanceEvaluation
Maximumpathloss 161.5 163.4 163.5
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
LinkbudgetsComparisonGSM/HSPA/LTE
180
MaximumpathlossvaluesforGSMvoiceandHSPAandLTEdata
170
175
155
160
165
dB
145
150
155
140
GSMvoice HSPA1Mbps/64kbps LTE1Mbps/64kbps
Uplink Downlink
www.cert.tn19 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
LinkbudgetsComparisonGSM/HSPA/LTE TheLTElinkbudgetindownlinkhasseveralsimilaritieswithHSPAandthe
maximumpathlossissimilar.
h l k h d ff ll f Theuplinkparthassomedifferences:smallerinterferencemargininLTE,nomacrodiversitygaininLTEandnofastfadingmargininLTE.
ThelinkbudgetsshowthatLTEcanbedeployedusingexistingGSMandHSPAsitesassumingthatthesamefrequencyisusedforLTEasforGSMandHSPA.
LTEitselfdoesnotprovideanymajorboostinthecoverage.ThatisbecausethetransmissionpowerlevelsandtheRFnoisefiguresarealsosimilarinGSMandHSPAtechnologies,andthelinkperformanceatlowdataratesisnotmuchdifferentinLTEthaninHSPA.
Thelinkbudgetwascalculatedfor64kbpsuplink,whichislikelynotahighenoughdataratefortruebroadbandservice.IfwewanttoguaranteehigherdataratesinLTE,wemayneedlowfrequencydeployment,additionalsites,activeantennasolutionsorlocalareasolutions.
www.cert.tn20 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
CellrangeComparison
Theurbancellrangevariesfrom0.6kmto1.4kmandsuburban CellrangeswithOkumuraHata
propagation modelfrom1.5kmto3.4km.
SuchcellrangesarealsotypicallyfoundinexistingGSMandUMTS
100
propagationmodel
gnetworks.
Theruralcaseshowsclearlyhigher cell ranges: 26 km for the
10
K
m
highercellranges:26kmfortheoutdoormobilecoverageandevenupto50kmfortheruralf d ll
1
fixedinstallationat900MHz. 0.1900MHz 1800MHz 2100MHz 2600MHz
Urbanindoor Suburbanindoor
Ruraloutdoor Ruraloutdoorfixed
www.cert.tn21 LTETechnology Perofrmance Evaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
Differencebetween900MHzand2600MHz
Urban RuralRuralfixedwireless
1:AccordingtoOkumuraHata. 2:Shared1.3mantennafor
/ d dPropagationloss (1) +14dB +14dB +14dB
BTS antenna gain 3 dB (2) 0 dBc 0 dB (3)
900/2600giving15and18dBigainat900vs2600MHz.
3:2.5mantennagiving18dBigainatBTSantenna gain 3dB (2) 0dBc 0dB (3)
BTScable loss (4) +1dB +3dB +3dB
900MHz.
4:Cable1/2.Urban30mandrural100m.
UEantenna gain 5dB (5) 5dB (5) 0dB (6) 5:Basedon3GPPRAN4
contributions.
6:Externalfixedantennaassumed.UEsensitivity (7) 1dB 1dB 1dB
Total +6dB +11dB +16dB
7:UEsensitivitycanbeupto3dBworseat900MHzbutthedifference in practice is less.
www.cert.tn22
differenceinpracticeisless.
LTETechnology Perofrmance Evaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
CellrangeLimitation
Theearthscurvaturelimitsthemaximumcellrangetoapproximately40kmwithan80mhighbasestationantennapp y gassumingthattheterminalisatgroundlevel.
ThemaximumcellrangecanbecalculatedwithEquationbelow
Toachieve100kmcellrange,therequiredantennaheightis580m!!!
R = 8650 km hRdR +=+ 222 )((Effective earth radius for radio propagation is4/3 larger than real radius)
RdRh
hRdR
+=+=+
22
)(
www.cert.tn23 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
Latency
Userplanelatencyisrelevantfortheperformanceofmanyapplications.pp
Thereareseveralapplicationsthatdonotrequireaveryhighdatarate,buttheydorequireverylowlatency:voice,realtimegaming,interactiveapplications.
www.cert.tn24 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
Latency:Endtoenddelaybudget
Delaycomponent Delayvalue
Transmissiontimeuplink +downlink
2ms
Onaverage,thepacketneedstowaitfor0.5msforthestartofthenextframedownlink
Bufferingtime(0.5transmissiontime)
2 0.5 1ms=1ms
Retransmissions10% 2 0.1 8ms=1.6ms
frame.
Theretransmissionstake8msatbest theassumedretransmission
Uplink scheduling request 0.5 5ms=2.5ms
Uplink scheduling grant 4ms
UE d l i d 4
probabilityis10%.
Theaveragedelayforsendingthescheduling request is 2 5 msUEdelayestimated 4ms
eNodeBdelayestimated 4ms
Corenetwork 1ms
l d l h ll d
schedulingrequestis2.5ms
Schedulinggrant:4ms. UEprocessingdelay:4ms,
Totaldelaywithpreallocatedresources
13.6ms
Totaldelaywithscheduling 20.1ms
p g y ,
eNodeB processingdelay:4ms corenetworkdelay:1ms.
www.cert.tn25 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
Endtoendroundtriptimeincludingschedulinglatency
25
LTEroundtriptime
20
Core
15eNB
UE
Uplinkschedulinggrant
Uplink scheduling request
5
10Uplinkschedulingrequest
Retransmissions
Bufferingtime
Transmissiontime
0
Delayvalue
www.cert.tn26 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
LTERefarmingtoGSMSpectrum
LTEcouldbedeployedintheexistingGSMspectrumlike 900 MHz or 1800 MHzlike900MHzor1800MHz.
TheflexibleLTEbandwidthmakesrefarmingeasierth ith WCDMA b LTE t t ith 1 4thanwithWCDMAbecauseLTEcanstartwith1.4MHzor3.0MHzbandwidthsandthengrowlaterh th GSM t ffi h d dwhentheGSMtraffichasdecreased.
www.cert.tn27 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
LTErefarmingtoGSMspectrum Example
www.cert.tn28 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
DimensioningCapacity Trafficvolumebasedapproach
Thebusyhourisassumedtocarry15%ofthedailytraffic
h b h l d thebusyhouraverageloadingis50%. Thecalculationshowsthatthetotal
sitethroughputpermonthis4600GB.
Tooffer5GBdataforeverysubscriberpermonth,thenumberofsubscriberspersitewillbe920.
www.cert.tn29 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
DimensioningCapacity Dataratebasedapproach
Target:1Mbpspersubscriber. Sinceonlysomeofthe
subscribersaredownloadingdatasimultaneously,wecanapplyanoverbookingfactor,forexampleg , p20.
Itmeansthattheaveragebusyhour data rate is 50 kbps perhourdatarateis50kbpspersubscriber.
Thenumberofsubscriberspersiteusingthisapproachis1050.
www.cert.tn30 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
Thanks for your AttentionThanks foryour Attention
www.cert.tn31 LTETechnology Perofrmance Evaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
LTE Technology Perofrmance Evaluation
ANNEXESLTETechnology Perofrmance Evaluation
www.cert.tn32 LTETechnologyPerofrmanceEvaluation
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
ULlinkbudgetparametersforLTE Parameters1
R f LTE f UMTS OFDMA d SC FDMA B d R di A
www.cert.tn33 LTETechnologyPerofrmanceEvaluation
Ref. LTE for UMTS OFDMA and SC-FDMA Based Radio Access Harri Holma and Antti Toskala
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
ULlinkbudgetparametersforLTE Parameters2
R f LTE f UMTS OFDMA d SC FDMA B d R di A
www.cert.tn34 LTETechnologyPerofrmanceEvaluation
Ref. LTE for UMTS OFDMA and SC-FDMA Based Radio Access Harri Holma and Antti Toskala
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
ULlinkbudgetparametersforLTE Parameters3
R f LTE f UMTS OFDMA d SC FDMA B d R di A
www.cert.tn35 LTETechnologyPerofrmanceEvaluation
Ref. LTE for UMTS OFDMA and SC-FDMA Based Radio Access Harri Holma and Antti Toskala
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
DLlinkbudgetparametersforLTE Parameters1
R f LTE f UMTS OFDMA d SC FDMA B d R di A
www.cert.tn36 LTETechnologyPerofrmanceEvaluation
Ref. LTE for UMTS OFDMA and SC-FDMA Based Radio Access Harri Holma and Antti Toskala
-
ITU/BDT Arab Regional Workshop on 4G Wireless Systems - Tunisia 2010
DLlinkbudgetparametersforLTE Parameters2
R f LTE f UMTS OFDMA d SC FDMA B d R di A
www.cert.tn37 LTETechnologyPerofrmanceEvaluation
Ref. LTE for UMTS OFDMA and SC-FDMA Based Radio Access Harri Holma and Antti Toskala