User's Manual

Mobile WiMAX Indoor RAS SPI-2210 System Description/Ed.07

MRU-2 is down converted by the Low Noise Amplifier (LNA) and converted into the

baseband signal via the Analog to Digital Conversion (ADC) process. This baseband signal

is transmitted to the MRA-S via the ‘Samsung Digital I/Q and OAM’ interface.

Mobile WiMAX base station RF Receiver (MRR)

On the service provider’s request of 4-branch Rx diversity to enhance the Rx performance

of the system, the 4-branch Rx diversity can be supported by additionally mounting a MRR

to the indoor SPI-2210.

The MRR is the dedicated RF Rx module to support six Rx paths and can support two Rx

paths per sector. The MRR can serve 2-carrier located within the 72 MHz band for each

module.

If the MRR is provided, the MRR is mounted on MRU-2 slot #6 and #7. The MRR is

provided to service providers optionally.

Mobile WiMAX base station Combiner Unit -2way(MCU-2)

If the Indoor SPI-2210 supports several 2 noncontiguous carriers located on the frequency

domain in any sector, the MCU-2 is mounted one by one per sector. MCU-2 outputs two

Tx paths combined into one path and MCU-3 outputs three Tx paths combined into one

path.

There are 3 kinds of MCU-2 according to combined frequency segments.

- MCU-2A

: 2496~2596MHz(MRU-2LB) + 2624~2690MHz(MRU-2FH or MRU-2UB)

- MCU-2B

: 2625.5~2635.5MHz(MRU-2UB)+2642~2672MHz(MRU-2FH or MRU-2UB)

- MCU-2C

: 2642~2672MHz(MRU-2FH or MRU-2UB)+2678.5~2688.5MHz(MRU-2UB)

MCU-3 (Mobile WiMAX base station Combiner Unit-3way)

If SPI-2210 supports 3 noncontiguous carriers in any sector, MCU-3 is

mounted instead of MCU-2. MCU-3 outputs three Tx paths combined

into one path.