Page 59 - GuideFWA

IN TER FER EN C E AN ALYSIS C ASE

Param eter Interfering TX Victim R X

System IS136 PC S1900
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 1894,920 1895,200
G uard Band betw een channeledges (KH z)
TX/R X frequency O ffset(KH z) 00

165

280,0

System D ata

TX Pow er(dBm ) 30

R X sensitivity (dBm ) **See N ote ** -104
9
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 4530,3
W hen only R X is on TX antenna 3dB-beam w idth 1191,6
W hen only TX is on R X antenna 3dB-beam w idth notapplicable
W hen both TX and R X are outofR X and TX antenna 3dB-beam w idth notapplicable

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

3,00 D esentization (dB ) R eq.D istance (m )

2,50 1,0 4530,3

Desentization (dB)2,00 0,25 6550,0 ###
0,50 5467,8 ###
1,50 0,75 4904,4 ###
1,00 4530,3 ###
1,00 1,25 4252,4 ###
1,50 4032,3 ###
0,50 1,75 3850,3 ###
2,00 3695,3 ###
0,00 1000,0 2000,0 3000,0 4000,0 5000,0 6000,0 7000,0 2,25 3560,3 ###
0,0 Required Distance (m) 2,50 3440,6 ###
2,75 3333,1
3,00 3235,4

Inter-American Telecommunication Commission 45