User's Manual

Mobile WiMAX Outdoor RAS SPI-2210 System Description/Ed.05
© SAMSUNG Electronics Co., Ltd. 3-7
3.2.2 RF Block (RFB)
The RFB is equipped with the MRU-2, which is the integrated RF module, in default and
the MCU for combining between noncontiguous carriers in the same sector according to
the service provider’s frequency operation plan.
Main Functions
 High-power amplification of RF transmission signal
 Interface for traffic, alarm, control signal and TDD signal by interfacing with the
MRA-S in ‘Samsung Digital I/Q and OAM’ method
 Upconversion/downconversion of frequency
 Gain control of RF Rx/Tx signal
 Rx/Tx RF signal from/to an antenna
 Suppression of out-of-band spurious wave emitted from RF Rx/Tx signal
 Low noise amplification of band-pass filtered RF Rx signal
 TDD switching function for Tx/Rx path
 MRU-2 output combining function when various noncontiguous carriers are supported.
 Support of additional RF Rx path for 4-branch Rx diversity (optional)
The RFB is configured as follows:
Figure 3.3 RFB Configuration
RFB
M
R
U
-
2
#
3
M
R
U
-
2
#
4
M
R
U
-
2
#
5
M
R
U
-
2
#
6
M
R
U
-
2
#
7
M
R
U
-
2
#
8
M
R
U
-
2
#
0
M
R
U
-
2
#
1
M
R
U
-
2
#
2
MCU-0 MCU-1 MCU-2
RFB
RFB