Rf Module And Rrh Main Blocks; Rf Module Main Blocks - Nokia Flexi Multiradio BTS Technical-Operating Documentation

RF Module and RRH main blocks

6 RF Module and RRH main blocks

6.1 RF Module main blocks

24
The RF Module includes the following functional blocks:
RF Baseband (RF BB)
•
RF control
–
Provides three optical interfaces with the System Module or other RF
•
modules (OBSAI RP3_01)
Provides the external alarm interface
•
Most of the module internal connections are made through this block
•
Processes signals and module control functionalities
•
Transmitter
–
Direct conversion from TX interface to TX RF
•
Digital power control
•
TX Double Power and IDD support
•
Predistortion transmitter
–
Receiver
–
Dual down conversion from RX RF to RX baseband signal
•
Diversity reception
•
Power Amplifier (PA)
•
Amplifies signal coming from RF BB TX output and feeds it to TX input of the
–
filters
RF Front end
•
Includes three duplexers and three diversity RX filters with LNAs and RF test
–
loops
Processes air interface RF signals for selected channels
–
Provides connection for Flexi Antenna Line to Flexi Multiradio Base Station
–
Supports usage of NSN Masthead Amplifier (MHA) units
–
Provides the supply voltage for MHA unit via antenna line(s)
–
Contains integrated bias-Ts with over-current and undercurrent alarm
–
detection/protection
Power supply unit (PSU)
•
Contains power input and distribution of internal supply voltages
–
Fan assembly
•
Consists of three separate fans and a fan plate which mechanically mounts to the
–
fan shroud
Flexi Multiradio BTS Radio Module and Remote Radio
DN0951745
Head Description
Issue: 05