User's Manual

Mobile WiMAX Outdoor RAS SPI-2210 System Description/Ed.05
© SAMSUNG Electronics Co., Ltd. 3-3
3.2 Detailed Structure
3.2.1 Digital Main Block (DMB)
The DMB operates and maintains the outdoor SPI-2210, is in charge of the interface
between the outdoor SPI-2210 and the router and provides the communication path
between processors in the system. In addition, the DMB creates a clock, provides the clock
to the lower hardware block and performs the channel processing function for the
subscriber signal.
When the outdoor SPI-2210 transmits a signal to an MS, the DMB performs the OFDMA
signal processing for the traffic signal received from the ACR and then converts the signal
via the ‘Samsung Digital I/Q and OAM’ converter to transmit it to RFB. On the contrary, if
the outdoor SPI-2210 receives a signal from an MS, the DMB receives the ‘Samsung
Digital I/Q and OAM’ signal from the RFB, performs the OFDMA signal processing for
the signal and transmits the signal to the ACR.
Main Functions
 Creation and distribution of the reference clock
 Fast Ethernet/Gigabit Ethernet interface with ACR
 Fault diagnosis and alarm collection and control
 Alarm report
 Channel resource management
 OFDMA signal processing
 Automatic Gain Control (AGC) for the received RF signal and Received Signal
Strength Indicator (RSSI) support