Dual-Band Digital Optical Repeater
DW-010-7373-08
Installation & Operation Manual -
Preliminary
Dali Wireless
Proprietary and Confidential
9
Rev: 0-2
Feb 2011
0
2.2 System Description
The Digital Optical Repeater (DOR) is comprised of a Digital Access Unit (DAU) that is RF coupled to the Base
Station, and Digital Remote Unit (DRU) located in areas that the Base Station signal cannot reach (gaps created
by natural or manmade obstacles, tunnels and subways, or inside buildings) as well simulcast in a DAS
configuration to provide optimum coverage and capacity in wireless networks.
A Single optical fiber interface, based on the CPRI standard, is used to connect the DAU with a number of DRUs,
in a star, daisy-chain (see Figure 2-2), or hybrid star/daisy-chain configuration. The DRU’s can be installed 15km
to 40km away from the DAU. Both DAU and DRU contain a Digital Processing section and an RF Processing
section.
Figure 2-2 Dali DOR System Block Diagram
For bidirectional optical communication between DAU and DRUs over single single-mode fiber cable, SFP optical
transceivers with built in WDM system are used. SFP modules are supporting data rates from 2.5 Gbps to 6.144
Gbps (dependant on the version of the DOR).
All digital signal processing, (framer/deframer, serializer/deserializer, digital down and up conversion (DDC and
DUC), crest factor reduction (CFR) and digital pre-distortion (DPD)), is performed inside Xilinx V6 FPGA.
Unit monitoring and control functionality is provided by proprietary software application that runs on Linux OS
supported by an ARM9 microprocessor. Multi-thread operation and web server access are supported by the
system.
DRU-1
SFP1
SFP2
Digital
Processing
Fiber R1
RF
Processing
1900MHz
RF
Processing
850MHz
AC-DC 110/220
to +27 VDC
110/220 VAC, 50/60 Hz
uP
Ethernet
RJ45
N
f
N
f
N
f
N
f
Tx/Rx ANT2
DL: 1930-1990 MHz
UL: 1850-1910 MHz
Tx/Rx ANT1
DL: 869-894 MHz
UL: 824-849 MHz
Rx Div. ANT1
UL: 824-849 MHz
Rx Div. ANT2
UL: 1850-1910 MHz
DRU-2
SFP1
SFP2
Digital
Processing
Fiber R2
RF
Processing
1900MHz
RF
Processing
850MHz
AC-DC 110/220
to +27 VDC
110/220 VAC, 50/60 Hz
uP
Ethernet
RJ45
N
f
N
f
N
f
N
f
Tx/Rx ANT2
DL: 1930-1990 MHz
UL: 1850-1910 MHz
Tx/Rx ANT1
DL: 869-894 MHz
UL: 824-849 MHz
Rx ANT1
UL: 824-849 MHz
Rx ANT2
UL: 1850-1910 MHz
BTS
850 MHz Band
BTS
1900 MHz Band
DAU
Digital
Processing
RF
Processing
1900MHz
RF
Processing
850MHz
DC-DC -48VDC
to 5 VDC
uP
Ethernet
RJ45
N
f
SFP1
Fiber 1
N
f
N
f
N
f
-48 VDC (-72 to -36 VDC), or
SFP2
Fiber 2
SFP3
Fiber 3
SFP4
Fiber 4
SFP5
Fiber 5
SFP6
Fiber 6
GSM
Modem
GSM
Modem
ANT
3dB ATT
3dB ATT
3dB ATT
3dB ATT
Tx/Rx
BAND2
+38dBm
Tx/Rx
BAND1
+38dBm
Rx Div.
BAND1
-90dBm
Rx Div.
BAND2
-90dBm
High Power 30dB ATT
High Power 30dB ATT
Low Power 30dB ATT
Low Power 30dB ATT
+43dBm
-95dBm
+43dBm
-95dBm
-95dBm
-95dBm
DL Gain: 40dB +10/-20 dB
UL Gain: 40dB +10/-20 dB
DL/UL ATT: 35 dB total
+3dBm
-55dBm
+3dBm
-55dBm
-55dBm
-55dBm
+43dBm
-95dBm
+43dBm
-95dBm
-95dBm
-95dBm
CommScope v. Dali Wireless
IPR2020-01409
DALI WIRELESS Exhibit 2003
Page 9 of 60
