Page 85 - GuideFWA

IN TER FER EN C E AN ALYSIS C ASE

Param eter Interfering TX Victim R X

System PC S1900 IS136
D evice Term inal B ase Station

Frequency D ata

1850-1990 M H z Frequency Block F (low erpart) C (low erpart)
W orking Frequency (M H z)
N um berofguard channels 1894,800 1895,400
G uard Band betw een channeledges (KH z)
TX/R X frequency O ffset(KH z) 00

485

600,0

System D ata

TX Pow er(dBm ) 33

R X sensitivity (dBm ) **See N ote ** -103
17
Specific C /Ivalue forR eceiverVictim System (dB)

Antenna and FeederD ata

Antenna heigth (m ) 1,5 25,0
Antenna G ain (dBi) 0,0 17,0
Antenna H orizontalBeam w idth (º) om ni 105
Antenna VerticalBeam w idth (º) om ni
Antenna D ow ntilt(º) 0 9
-3

FeederLosses (dB) 0,0 2,0

O therC alculation Inputs

Im provem enton TX m ask specification (dB) 0,0
Allow ed R x D esensitization (dB) 1,0

N ote:This is the R eceiverSensitivity w ith R ayleigh Fading (7 dB )

R ESU LTS

R equired distances forD esentization equalto 1 dB : R eq.distance (m )

W hen both TX and R X are on R X and TX antenna 3dB-beam w idth 1377,7
W hen only R X is on TX antenna 3dB-beam w idth 7,6
W hen only TX is on R X antenna 3dB-beam w idth
W hen both TX and R X are outofR X and TX antenna 3dB-beam w idth notapplicable
notapplicable

R equired distances w hen TX and R X antennae are on-beam ,fordifferentD esentization:

Desentization (dB)3,00 D esentization (dB ) R eq.D istance (m ) ###
2,50 ###
2,00 500,0 1000,0 1500,0 2000,0 1,0 1377,7 ###
1,50 ###
1,00 0,25 1992,0 ###
0,50 0,50 1662,9 ###
0,00 0,75 1491,5 ###
1,00 1377,7 ###
0,0 1,25 1293,3 ###
1,50 1226,3 ###
Required Distance (m) 1,75 1171,0
2,00 1123,8
2,25 1082,7
2,50 1046,4
2,75 1013,7
3,00 984,0

Inter-American Telecommunication Commission 71