User's Manual

Mobile WiMAX Indoor RAS SPI-2210 System Description

CHAPTER 3. Indoor SPI-2210

Architecture

3.1 System Configuration

The indoor SPI-2210 is roughly composed of two blocks (DMB and RFB), PDP-PIR and

auxiliary device part.

Digital Main Block (DMB)

The DMB operates and maintains the indoor SPI-2210, enables the indoor SPI-2210 to

interface with ACR and provides the communication path between processors in the system.

The DMB creates the reference clock, provides the clock to the lower hardware block and

performs the signal processing function for the subscriber signal.

RF Block (RFB)

The RFB is equipped with MRU-2 which integrates transceiver, power amplifier, filter and

TDD switch.

The MRU-2 changes the signal received from an external antenna or MRA-S of the DMB

into RF or baseband signal and transmits to the MRA-S or the external antenna.

When the indoor SPI-2210 supports 4-branch Rx diversity on a user’s request, Mobile

WiMAX base station RF Receiver (MRR), which is a dedicated Rx module, and Mobile

WiMAX base station Combiner Unit (MCU) to combine noncontiguous carriers in the

frequency band can be mounted on RFB.

Power Distribution Panel-Premium Indoor Redundancy (PDP-PIR)

The PDP-PIR receives DC power via a rectifier composed in a separate rack and distributes

the power to each block in the corresponding rack. An operator can control the DC power

supply by switching on/off the circuit breaker in the front of the PDP-PIR.