part2 - performances
TRANSCRIPT
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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