Page 83 - GuideFWA

IN TER FER EN C E AN ALYSIS C ASE

Param eter Interfering TX Victim R X

System PHS IS95
D evice B ase Station Term inal
Frequency D ata

1850-1990 M H z Frequency Block 1910 -1930 M H z A (upperpart)
W orking Frequency (M H z)
N um berofguard channels 1929,350 1931,250
G uard Band betw een channeledges (KH z)
TX/R X frequency O ffset(KH z) 00

1125

1900,0

System D ata

TX Pow er(dBm ) 22

R X sensitivity (dBm ) **See N ote ** -105
-9
Specific C /Ivalue forR eceiverVictim System (dB)

Antenna and FeederD ata

Antenna heigth (m ) 15,0 1,5
Antenna G ain (dBi) 10,0 0,0
Antenna H orizontalBeam w idth (º) om ni om ni
Antenna VerticalBeam w idth (º) om ni
Antenna D ow ntilt(º) 8 0
-7

FeederLosses (dB) 1,0 0,0

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 4,3
W hen only R X is on TX antenna 3dB-beam w idth notapplicable
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:

Desentization (dB)3,00 D esentization (dB ) R eq.D istance (m ) ###
2,50 ###
2,00 50,0 100,0 150,0 1,0 4,3 ###
1,50 ###
1,00 0,25 147,4 ###
0,50 0,50 112,6 ###
0,00 0,75 82,6 ###
1,00 ###
0,0 1,25 4,3 ###
1,50 3,8 ###
Required Distance (m) 1,75 3,4
2,00 3,1
2,25 2,9
2,50 2,7
2,75 2,5
3,00 2,4
2,2

Inter-American Telecommunication Commission 69