1 © N o kia S ie m ens N e tw o rks F le x i E D GE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Flexi EDGE BTS
Combining
O
ptions
2 © N o kia S ie m ens N e tw o rks F le x i E D GE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
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ia training
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ive property of Nokia. No
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ia owns the rights to copying,
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on or derivatives including any
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a has the sole right to copy,
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aining material. I
ndividuals can use the Nok
ia training
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iduals cannot subsequently pass
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ia training session for
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3 © N o kia S ie m ens N e tw o rks F le x i E D GE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Contents
•
Objectives
•
Introduction
to Configurations
•
Terminology, abbreviations, and schematic
format
explained
•
Combining
B
ypass
C
onfigurations
•
Common Configurations
(wideband
combining)
•
Smart
R
adio Concept
(SRC) Configurations*
•
Remote
Tune
Combiner
(RT
C
) configurations
•
Exercises
–
paper-based
•
Exercises
–
Hands
-on
•
SRC configurations
are
not
possible
until
Flexi
EDGE EP2/ BSC S13
software releases. However
they
will
be
covered
in theory
.
4 © N o kia S ie m ens N e tw o rks F le x i E D GE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Flexi
EDGE BTS Configurations
–
1
: Theoretical
Objectives
After
c
ompletion
o
f this
module
the participant
w
ill
be
able
to:
•
Name
the 5 main combining
options
•
List
the modules
required
for various
common configurations
•
Describe
the Nok
ia Smart
R
adio configurations
•
Describe
the differences
between
Cost-optimised
and Upgrade-optimis
e
d
configurations
5 © N o kia S ie m ens N e tw o rks F le x i E D GE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Flexi
EDGE BTS Configurations
–
2
: Practical
Objectives
After
c
ompletion
o
f this
module
the participant
w
ill
be
able
to:
•
Examine
for
correctly
installed
F
lexi
EDGE BTS
•
Identify
the
interfaces
and connectors
o
f the
F
lexi
EDGE BTS
•
Examine
for
correctly
installed
c
ables
on the
F
lexi
EDGE BTS
•
Describe
the
Flexi
E
DGE BTS sector/TRX configuration
options
•
Annotate, on a diagram
the
RF cable
routing
in configurations
specified
b
y
the
instructor
•
Create
physical
c
onfigurations
as specified
b
y
the
instructor
•
Create
a
list of the
required
modu
les
and ancillary
c
omponents
for
the
configurations
above
6 © N o kia S ie m ens N e tw o rks F le x i E D GE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Combining options and dual band for Flexi
EDGE
To minimize the number of antennas and maximize coverage and
capac
ity, Flexi EDGE BTS supports
wideband and RTC
combining
Five main combining options
:
•
By-pass combining
•
2-way combining
•
4-way combining
•
6-way Remote Tune Combining (RTC)
•
Double Power (DPTRX) combining
Flexi EDGE supp
orts dual band co
nfigurations required in ANSI and
ETSI markets:
•
GSM 800/1800
•
GSM 800/1900
•
GSM 900/1800
7 © N o kia S ie m ens N e tw o rks F le x i E D GE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
One
S
ector
configuration
table
#of
carriers
Co
mbining
# of
EXxA
# of
ERxA
# of
ECxA
# of
ESM
A
# of
ES
EA
height
# of
antennas
1
B
y-pass 1UD
1
1
0
1
0
3HU
1
1-2
B
y-pass 2UD
1
1
0
1
0
3HU
2
2
2-w
ay 1UD
1)
11
0
1
0
3
H
U
1
3
B
y-pass 2UD
2
2
0
1
0
6HU
3
4
B
y-pass 2UD
2
2
0
1
0
6HU
4
3-4
4-w
ay 1UD
1)
21
0
1
0
5
H
U
1
1
B
y-pass DP 2UD
1
1
0
1
0
3HU
2
2
B
y-pass DP 2UD
2
1
0
1
0
5HU
2
3
B
y-pass DP 2UD or
4UD
3
2
0
1
0
8
HU
3 or 4
4
B
y-pass DP 2UD or
4UD
4
2
0
1
0
10HU
4
1-2
B
y-pass SRC
1)
or
DP 4UD
22
0
1
0
6
H
U
4
3-4
2-w
ay 2UD
2
1
0
1
0
5HU
2
5-6
4-w
ay 2UD
3
1
0
1
0
7HU
2
7-8
4-w
ay 2UD
4
1
0
1
0
9HU
2
Up to 12
RTC
U
p to
6
0
U
p to
2
1
1
Up to
20HU
2
1)
sup
ported w
8 © N o kia S ie m ens N e tw o rks F le x i E D GE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Stack
configuration
table
Configuration
Combining
# of
EXxA
# of
ERxA
# of
EWxA
# of
ESMA
# of
FPA
A
Max
Height
1)# of
Antennas
1 to 2 omni
By-pass 2U
D
1
1
0
1
1
9HU
2
3 to 4 omni
2-w
ay 2UD
2
1
2
1
1
11HU
2
5 to 6 omni
4-w
ay 2UD
3
1
6
1
2
13HU
2
7 to 8 omni
4-w
ay 2UD
4
1
6
1
2
15HU
2
1+1 By-pass
1U
D
1
1
0
1
1
9HU
2
1+1 or 2+2
B
y-pass 2U
D
2
2
0
1
1
12HU
4
3+3
B
y-pass 2U
D
3
2
4
1
2
14HU
4
4+4
B
y-pass 2U
D
4
2
4
1
2
16HU
4
1+1+1 or 2+2+2
B
y-pass 2U
D
3
3
0
1
2
15HU
6
3+3+3
2-w
ay 2UD
5
2)3
6
1
3
19HU
6
4+4+4
2-w
ay 2UD
6
3
6
1
3
21HU
6
1+1+1
B
y-pass DP 2UD
3
3
3
1
2
15HU
6
2+2+2
B
y-pass DP 2UD
6
3
6
1
3
21HU
6
1+1+1 or 2+2+2
By-pass DP or
SRC
3)4U
D
6
6
3 or 6
1
0
21HU
12
2+2+2/2+2+
2 dual
band
By-pass 2U
D
6
6
0
1
0
21HU
1
2
1)
Assuming
built
for
Cost-opti
m
ised. U
pgrade-op
timi
sed
needs
6 x
EXx
A. 2
) SR
C==IDD+4UD 3)
Inc. FP
MA
9 © N o kia S ie m ens N e tw o rks F le x i E D GE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Pole
and Wall mount
configuration
table
Configuration
Combining
# of
EXxA
# of
ERxA
# of
EWxA
# of
ESMA
# of
FPA
A
# of
stacks
# of
antennas
1 to 2 omni
By-pass 2U
D
1
1
0
1
1
1
2
3 to 4 omni
2-w
ay 2UD
2
1
2
1
1
2
2
5 to 6 omni
4-w
ay 2UD
3
1
6
1
2
2
2
7 to 8 omni
4-w
ay 2UD
4
1
6
1
2
3
2
1+1 By-pass
1U
D
1
1
0
1
1
1
2
1+1 or 2+2
B
y-pass 2U
D
2
2
0
1
1
2
4
3+3
B
y-pass 2U
D
3
2
4
1
2
2
4
4+4
B
y-pass 2U
D
4
2
4
1
2
3
4
1+1+1 or 2+2+2
B
y-pass 2U
D
3
3
0
1
2
2
6
3+3+3
2-w
ay 2UD
5
3
6
1
3
3
6
4+4+4
2-w
ay 2UD
6
3
6
1
3
4
6
1+1+1
B
y-pass DP 2UD
3
3
3
1
2
2
6
2+2+2
B
y-pass DP 2UD
6
3
6
1
3
4
6
1+1+1 or 2+2+2
By-pass DP or
SRC 4UD
6
6
3 or 6
1
3
4
12
2+2+2 /2+2+2
dual band
B
y
-p
a
ss
66
013
4
1
2
10 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Indoor
or
Outoor
cabinet
configuration
table
Confi
g
uration
C
o
mb
in
ing
EX
x
A
’s
ERxA’s
ECxA’s
E
S
MA’s
ES
EA
’s
height
an
te
nna
1 to
2
om
ni
B
y
-p
as
s
2UD
1
1
0
1
0
6H
U
2
3 to
4
om
ni
2-w
ay
2UD
2
1
0
1
0
8H
U
2
5 to
6
om
ni
4-w
ay
2UD
3
1
0
1
0
10
HU
2
7 to
8
om
ni
4-w
ay
2UD
4
1
0
1
0
12
HU
2
1 to
6
om
ni
RT
C
2UD
1
to
3
0
1
1
1
1
9
H
U
2
7 to
1
2
om
ni
RT
C
2UD
4
to
6
0
2
1
1
2
9
H
U
*
2
1+1 B
y
-p
as
s
1UD
1
1
0
1
0
6H
U
2
1+1 or 2+2
B
y-p
a
ss
2UD
2
2
0
1
0
9H
U
4
3+3
B
y-p
a
ss
2UD
3
2
0
1
0
11
HU
4
4+4
B
y-p
a
ss
2UD
4
2
0
1
0
13
HU
4
1+1+1 or 2+2
+
2
B
y-p
a
ss
2UD
3
3
0
1
0
12
HU
6
3+3+3
2
-w
ay 2UD
5
3
0
1
0
1
6
H
U
6
4+4+4
2
-w
ay 2UD
6
3
0
1
0
18
HU
6
1+1+1
B
y-p
a
ss
DP
2
U
D
3
3
0
1
0
12
HU
6
2+2+2
B
y-p
a
ss
DP
2
U
D
6
3
0
1
0
18
HU
6
1+1+1 or 2+2
+
2
B
y
-p
as
s DP
or
SRC 4UD
66
0
1
0
2
1
H
U
*
1
2
6+6+6
R
T
C
2UD
9
0
3
1
1
36
HU
*
6
12
RT
C 2UD
6
0
2
1
1
29
HU
*
2
12+6
RT
C 2UD
9
0
3
1
1
36
HU
*
4
8+8+8
4
-w
ay 2UD
12
3
0
1
1
33
HU
*
6
*
Two
cabinets
required
11 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Configurations
in this
chapter:
Common Configurations
•
1 TRX 1UD –
s
mallest
possible
c
onfiguration
•
2 TRX, by-pass, 2UD
•
4+4+4, 2-way combining, 2UD
Large
C
onfiguration
•
8+8+8, 4-way combining, 2UD
•
6+6+6 RTC
–
(one
sector
shown)
•
12 TRX RTC
New features
/SRC
•
1+1+1 DP 2UD
•
2+2+2 IDD 4UD
12 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Common Configurations
13 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Terminology
and abbreviations
-1
Combiner
Bypass
–
No combining
”2-Way”
–
Two
T
X signals
into one
Antenna
”4-Way”
–
Four
TX signals
into one
Antenna
Antenn
a(s)
X
Wideband Com
b
iners
WBC
Dual
Duplexer
LNA
LNA
Duplexer
Duplexer
LNA+ Multi- coupler
LNA+ Multi- coupler
Duplexer
Duplexer
TX1
RX1
RX2
TX2
Main Div
Main Div
Dual TRXs
LNA+ Multi- coupler
RX filter
Cavit
ies
RX filter
Duplexer
LNA+ Multi- coupler
Remote Tune Com
b
iner (RTC)
Main Div
Main Div
=
Main o
f RX1 is used
as
Divers
e
of RX2 and vice-vers
a
14 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Terminology
and abbreviations
-2
CAD –
cable
auto detection
DP –
Double
Power
IDD –
Intelligent
Downlink
Diversit
y
DTRX –
Dual
TRX (=EXxA)
DPTRX –
Dual
TRX configured
in
Double
Power
mode
HU –
Height
Unit
DDU –
Dual
Duplexer
Unit
(=ERxA)
SCF –
Site
Configuration
F
ile. More
detail
in the module
”Commissioning”
1UD, 2UD, 4UD
–
n-way
Uplink
Diversity
where
1UD is really
no UD. 4UD requires
setting
up
in the BSC also, and is a
Licenced
feature
Borrowed
R
X Diversity
–
A TRX
receives
an RX signal
through
one
of
the RX DIV ports
connected
to a DDU,
which
is not
the same
DDU as the
corresponding
TRX transmits
through.
SCF Overrule
–
RF cbles
can
be
autodetected
with
C
AD, or
they
can
b
e
defined
during
commissioning. If
during
commissioning
they
are
defined
as
”SCF Overrule”, the cable
information
is
defined
from
the commissioning
information
SRC –
Smart
R
adio Concept. IDD used
with
4
15 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
1 TRX, no diversity
Smallest
possible
configuration
16 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
1-TRX Combining
B
y-pass, 1UD schematic
LNA
LNA
Duplexer
Duplexer
LNA+ Multi- coupler
LNA+ Multi- coupler
Duplexer
Duplexer
Dual
Duplexer
Dual TRX
TX1
RX1
Main Div
RX2
Main Div
TX2
Div
Antenn
a
_
Simplest
possible
c
onfiguration
17 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
18 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
2 TRX Combining By-pass with 2-way RX diversity
–
S
chematic
Example: 2 TRX/cell
LNA
LNA
Duplexer
Duplexer
LNA+ Multi- coupler
LNA+ Multi- coupler
Duplexer
Duplexer
Dual
Duplexer
Dual TRX
TX1
RX1
Main Div
RX2
Main Div
TX2
Div
Antenn
as
X
19 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
20 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Example: 4 TRX/cell
Dual TRXs
Antenn
as
2-way Wideband Combining
with
2-way RX diversity
–
S
chematic
X
TX1
RX1
Main Div
RX2
Main Div
TX2
Div
TX3
RX3
Main Div
RX4
Main Div
TX4
Div
Dual
Duplexer
LNA
LNA
Duplexer
Duplexer
LNA+ Multi- couple
r
LNA+ Multi- couple
r
Duplexer
Duplexer
Wideband Com
b
iners
21 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
4-way
C
ombining, 2-way Uplink
Diversity
22 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
4-way Wideband Combining
with
2-way RX diversity
Dual
Duplexer
Antenn
as
X
LNA
LNA
Duplexer
Duplexer
WBC
WBC
WBC
WBC
Wideband Com
b
iners
Dual TRXs
WBC
WBC
TX1
RX1
Main Div
RX2
Main Div
TX2
Div
TX3
RX3
Main Div
RX4
Main Div
TX4
Div
TX5
RX5
Main Div
RX6
Main Div
TX6
Div
TX7
RX7
Main Div
RX8
Main Div
TX8
Div
LNA+ Multi- coupler
LNA+ Multi- coupler
Duplexer
Duplexer
Example: 8 TRX/cell
For each
sector:
14 Tx cables
8 Rx
cables
23 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
EDGE/BTS 8+8+8 WBC 4:1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
DT
RX 1
DT
RX 2
DT
RX 4
ESMA
DDU 1
DT
RX 3
TDT
RX 5
DT
RX 6
DT
RX 8
DDU 2
DT
RX7
DT
RX 9
DT
RX 10
DT
RX 12
DDU 3
DT
RX 11
ESEA
WB C 1 WB C 2 WB C 3 WB C 4 WB C 5 WB C 8 WB C 9 WB C 1 0 WB C 1 1 WB C 1 4 WB C 1 5 WB C 1 6 WB C 1 7 WB C 6 WB C 7 WB C 1 2 WB C 1 3 WB C 1 88+8+8
4-way
2UD
24 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
6+6+6,
Remote
Tune
Combiner
25 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
LNA+ Multi- coupler
RX filter
Cavit
ies
RX filter
Duplexer
LNA+ Multi- coupler
1 X-pol
Antenna
X
TX5
RX5
Main Div
RX6
Main Div
TX6
Div
TX3
RX3
Main Div
RX4
Main Div
TX4
Div
TX1
RX1
Main Div
RX2
Main Div
TX2
Div
Remote Tune Combining with 2-way RX diversity
–
O
ne
sector of a 6+6+6
Example: 6 TRX/cell
Remote Tune Com
b
iner (RTC)
Dual TRXs
With RTC up to 6 Tx signals can be combined into 1 antenna, minimizing the combiner loss
26 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Flexi EDGE BTS
6+6+6 RTC
RTC
DTRX
RTC
DTRX
RTC
ESEA
DTRX
ESMA.
DTRX
DTRX
DTRX
DTRX
DTRX
DTRX
27 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Other
c
onfigurations
28 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
LNA+ Multi- coupler
RX filter
Cavit
ies
RX filter
Duplexer
LNA+ Multi- coupler
LNA+ Multi- coupler
RX filter
Cavit
ies
RX filter
Duplexer
LNA+ Multi- coupler
TX11
RX11
Main Div
RX12
Main Div
TX12
Div
TX9
RX9
Main Div
RX10
Main Div
TX10
Div
Remote Tune Com
b
iners (RTC)
Remote Tune Combining with 2-way RX diversity
Example: 12 TRX/cell
12 TRX/cell can be built with 2 RT
Cs
and 1 x-polarized antenna panel
Antenn
as
X
Dual TRXs
TX5
RX5
Main Div
RX6
Main Div
TX6
Div
TX3
RX3
Main Div
RX4
Main Div
TX4
Div
TX1
RX1
Main Div
RX2
Main Div
TX2
TX7
RX7
Main Div
RX8
Main Div
TX8
6
3
3
3
3
6
1
1
29 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Double Power TRX with 2-way RX diversity
Wideband Com
b
iners
(co
here
nt)
EWxA
Dual Duplexer
Example: 1 TRX/cell
LNA+ Multi- coupler
LNA+ Multi- coupler
Duplexer
Duplexer
EWxA
Dual TRX
TX1
RX1
Main Div
RX2
Main Div
TX2
Div
•
DPTRX is achieved by coherently combin
ing Tx signals of 2 carriers within
DTRX
•
Single TRX capacity
•
DPTRX provides 2.5 dB gain in output power
•
Requires EWx
A
Ph
ase fee
d
back
MHA
Antenn
as
and MHAs
X
30 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
LNA+ Multi- coupler
LNA+ Multi- coupler
Duplexer
Duplexer
Ph
ase fee
d
back
LNA+ Multi- coupler
LNA+ Multi- coupler
Duplexer
Duplexer
TX3
RX3
Main Div
RX4
Main Div
TX4
Div
TX1
RX1
Main Div
RX2
Main Div
TX2
Div
Double Power TRX with 4-way RX diversity
Wideband Com
b
iners
(co
here
nt)
Dual Duplexers
DTRX Units
Antenn
as
Example: 1 TRX/cell
Needed f
or supporting
second Duplexer (DC power)
EWxA
X
31 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Antenn
as
X
X
Wideband Com
b
iners
(co
here
nt)
Dual Duplexers
DTRX Units
Double Power TRX with 4-way RX diversity
Example: 2 TRX/cell
EWxA
TX1
RX1
Main Div
RX2
Main Div
TX2
TX3
RX3
Main Div
RX4
Main Div
TX4
Ph
ase fee
d
back
Ph
ase fee
d
back
LNA+ Multi- coupler
LNA+ Multi- coupler
Duplexer
Duplexer
EWxA
LNA+ Multi- coupler
LNA+ Multi- coupler
32 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
Dual Duplexer
LNA+ Multi- coupler
LNA+ Multi- coupler
Duplexer
Duplexer
Antenn
as
and MHAs
X
Dual TRX
TX1
RX1
Main Div
RX2
Main Div
TX2
Div
IDD and 2-way RX diversity (with MHA)
Example: 1 TRX/cell
•
Intelligent Downlink Diversity (IDD)
is an effective way of boosting
the downlink: it is based on space
and time diversity and signal
tuning
•
IDD gives on average 5 dB
gain in downlink path
33 © N o k ia S ie m ens N e tw o rks F le x i E DGE B T S C o mb in ing Op ti on s & Conf igu ra tio n s / Au tho r / 09.10 .2007 Co nfi d e ntial
