User Manual

FiberDistributedAntennaSystem(FiberDAS)
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Table 43 Example of GSM link budget
Linkbudget GSM with Fiber DAS
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DOWNLINK
OutputpowerDASremoteunit 30.0 dBm 
Numberofcarriers 2.0 pcs Thisgivesthepercarrierpower
Powerpercarrier 27.0 dBm 
SplitlossfromRUporttolastantenna 6.0 dB
Cablelosses 4.0 dB 
DASantennagain 3.0 dB 
EIRP 20.0 dBm 
MSNoisefloor ‐121.0 dB 
MSNF 3.0 dB 
MSC/I 12.0 dB 
MSFadingmargin 6.0 dB 10dBforvehiclemovements
Penetrationloss 0.0 dB Usedforinvehicle(10dBforcar)
AntennagainMS 1.0 dB 
BodylossMS 5.0 dB 
Requiredsignallevel ‐96.0 dBm Designtarget
AllowedpathlossfromantennatoMS 116.0 dB 
RadiatingcablecouplinglossC95 70.0 dB Onlywhenusingradiatingcable
Lossper100m4.0dBOnlywhenusing radiatingcable
Maximumlengthofradiatingcable 1149.5 m 
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UPLINK
SpectralnoisefloorofBTS ‐121.0 dBm 
NoisefigureBTS 3.0 dB 
C/IforBTS 9.0 dB 
BTSor iginalnoisefloor ‐118.0 dBm 
BTSor iginalsensitivity ‐109.0 dBm 
Fadingmargin 6.0 dB 
FiberDASthermalnoisefloor ‐121.0 dBm 
NoisefigureDASlink 3.0 dB 
Numberofequallinks 3.0 pcs 
Systemnetgain 0.0 dB Ifyournoiseloadishighyoushouldlowerthis
DASNoisere
sult ‐118.0 dBm 
NoiseloadonBTSwithDAS ‐115.0 dBm 
DesensitizationonBTS 3.0 dB 
NewBTSSensitivity ‐106.0 dBm 
LossfromBTStoremoteantenna 7.0 dB 
Sensitivityatremoteantenna ‐99.0 dB 
Fadingmargin 6.0 db 
Penetrationloss 0.0 dB 
AntennagainMS 1.0 
BodylossMS 5.0 
Requiredsignallevel ‐89.0  
MSOutputpower 30.0 dBm For900use33dBmfor18/1900bandsuse30
AllowedpathlossfromMStoantenna 119.0 dB 
Balancedownlink‐uplink ‐3.0 dB Thisshouldpreferablybe+/‐5dB
RadiatingcablecouplinglossC95 70.0 dB Onlywhenusingradiatingcable
Lossper100m4.0dBOnlywhenusing radiatingcable
Maximumlengthofradiatingcable 1224.5 m 