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  • 8/9/2019 Part2 - Performances

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    12/12/08 1-

    Part 2 - Performances

    Pierre Lescuyer

    DIAM

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    Content

    LTE standard options a!in" an impact on performances

    #ic data rates $

    #at a%out MIM& performances $

    Lin' (ud"et comparison )it *+PA

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    LTE user rates

    LTE proposes many impementations and depoyment options

    E.austi!e !ie) on user rates is uite uneasy to "et

    Option

    Effect

    2x2 TX Diversity Reference value

    2x2 MIMO Spatial Diversity Rate x2 close to the antenna (

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    LTE Layer 1 rate o!er!ie)

    12

    ,

    3

    48

    510

    11

    12

    1,1

    1

    16

    ,

    10

    1

    20

    -

    10 00070

    20 00070

    ,0 00070

    0 00070

    0 00070

    30 00070

    40 00070

    $it rate

    (567s!

    #o%in, Schee (#8I!

    ro 8.S5 to "89M #ell $:(1'" to 20 M)4!

    Max D/ /T; 6itrate in MIMO 2x2 TxDiv

    Peak Layer 1 bit rate taking into account cell common channels overhead and 10% AR

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    LTE Layer 1 rate o!er!ie)

    +pectra efficiency decreases )it ce (and)idt confi"uration

    eati!e )ei"t of Contro Cannes ma'es 16 and , M*9 ce confi"uration ess attracti!e

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    LTE %it rates

    E.ampe: a 20 M*9 %and)idt ce at 263 ;*9

    #b$s

    /T; 96solute Theoretical Maxiu

    12 su6carriers x 1" sy6ols "89M x 100 Resource $loc=s

    Maxiu rate %istance < +0

    10> $/;R 7 2"> coon channels si,nallin, overhea%

    Maxiu rate %istance ? @00

    sin, 2x2 TxDiv

    Below 100m bit rates may possibly be &! or &' depending on #(#O scheme )*patial +iversity,

    Beyond 100m *patial +iversity is useless )because -$( is too lo.,

    100 #b$s

    /0 #b$s

    10

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    +pectra Efficiency comparison

    )S.9 R :iM9X

    /T;

    )S.9A

    Ma.imum

    Teoretica

    E.pected spectra

    efficiency0.7 b/s/Hz 1.6 b/s/Hz 2 b/s/Hz

    10Mb/s

    over 5MHz

    25Mb/s

    over 5MHz

    MIM 2!2

    100Mb/s

    over 20MHzMIM 2!2

    "2Mb/s

    over 5MHz

    MIM 2!2

    !#

    $20%

    *PA initial "2PP ob3ective .as to reach same spectral efficiency as L4E over 5#6 channels

    L4E interest lies in capacity improvement ).hen using !0#6,

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    LTE MIM& scemes

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    LTE MIM& performances

    MIM 'p()i(l Diversi)yreuires i" += condition ?at east 1 d(@meanin" it is useess at ce ed"e

    +B-MIM& 2.2 +IM& 1.2 ?.Di!@

    Do&nlin= MIMO vs' SIMO coparison for a @57h pe%estrian profile in a 10M)4 cell

    0

    000

    10000

    1000

    20000

    2000

    ,0000

    ,000

    0000

    000

    - 0 10 20 2 ,0 , SR (%$!

    Throu,hput(56

    ps!

    1+

    7ear &! performance

    for high *7R

    -'ore D$34 +U (se 1 )ri(l resl)s8

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    LTE MIM& performances

    1 d( in += corresponds to 6"9M / :odin; b$s

    4he no:L4E land

    -'ore '< +ink bd;e) (ll()ions8

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    Lin' (ud"et comparison

    adio performances are ti"t to Receiver *ensitivity

    *min? 7oise @actor & 4hermal 7oise in 8and.idth & *7R

    Te actua e.pression is different in #CDMA and &DM

    4:DM +d(m = - 14 106o"?cip rate@ E%/=0 - 106o" ?Processin" ;ain@

    DM +d(m = - 14 106o"?1F*9 12 =%esource (oc's@ +=

    #at is te !aue of +ensiti!ity for ,00F%/s $

    euired sensiti!ity is uite simiar %et)een te 2 systems

    = d( 4

    Pnoise density d(m/*9 -14

    =oise in (and)idt d(*9 32

    += d( -07

    Sensitivity %$ 10

    /T; @00567s= d( 4

    Pnoise density d(m/*9 -14

    =oise in (and)idt d(*9 33

    E%/=o d(

    Processin" ;ain d(*9 11

    Sensitivity %$ 10B

    )SD.9 @00567s

    -re( s)ill nder s)dy8

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    Lin' (ud"et comparison

    Te difference in terms of co!era"e is ten uite sma

    *ypotesis:

    LTE ,00F%/s is acie!ed %y usin" 8 ( permanenty aocated )it GP+F C 062

    TH Po)er: LTE is 20# / *+PA is 1# ?i6e6 20# minus common cannes po)er@

    C&+T2,1 propa"ation mode

    )S.9 @00= /T; @00=

    'ensi)ivi)y dBm $10= $106

    Ma. T. Po)er (T+ d(m 2 ,

    =ode( Antenna "ain d(i 18 18

    . reference sensiti!ity ?+@ d(m -108 -103

    BE Antenna "ain d(i 0 0

    Po)er contro mar"in d( 0 0

    Lo" =orma adin" mar"in d( 11 11

    Interference mar"in d(

    Indoor penetration mar"in d( 21 21

    re>eny MHz 2100 2100

    Hb B(se ')()ion Hei;) m #0 #0

    Hm Mobile Hei;) m 1?5 1?5

    D/ Maxiu 9llo&a6le .ath loss %$ 1@2C00 1@1C00

    Distance ++C+@ 1"C0+

    -re( s)ill nder s)dy8

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    reuency %and impact

    Propa"ation oss difference ta'in" 2100 M*9 as a reference

    Cacuation are done usin"

    centra freuency for eac %and

    C&+T2,1-*ata mode ?as in ET 10,@

    More tan d( Pat Loss difference %et)een 1800 M*9 and 263 ;*9

    1B00 M)4 2100 M)4 200 M)4

    E-BTA= %and ?,3610@ , 1 4

    + Bpin' ran"e 14,4 - 148 1520 - 15, 200 - 240

    eati!e propa"ation oss $1?"" dB 0 dB " dB

    + Do)nin' ran"e 18,2 - 18, 2110 - 212 2320 - 2350

    eati!e propa"ation oss $2 dB 0 dB #?# dB

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    +ome eary fied tria resuts

    =+= performances in a JD-JK# tria durin" &cto%er 2008:

    +in"e sector site

    DL: 2.2 MIM& / BL 1.2 +IM&

    20 M*9 %and)idt ce at 263 ;*9

    terminas in parae usin" different routes

    Bsers are ser!ed %ased on teir radio conditions

    Ma.imum distance is 1 to 17 Fm

    Ma.imum teoretica pea' rate is 120M%/s

    ;1 ;2 ;@ ;"

    L1 trou"put DL me(n 1@?17 11?2= @?=" "#?21 Mbps

    L1 trou"put DL min 10?66 2?0= 2?@2 2#?52 Mbps

    L1 trou"put DL m(! 26?6# 2"?66 2"?5 61?=2 Mbps