Nokia Flexi Multiradio BTS - RF Module and RRH Main Blocks; RF Module Main Blocks

6 RF Module and RRH main blocks
6.1 RF Module main blocks
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
RFModuleandRRHmainblocks FlexiMultiradioBTSRadioModuleandRemoteRadio
HeadDescription
24 DN0951745 Issue:05
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