Page 79 - GuideFWA

IN TER FER EN C E AN ALYSIS C ASE

Param eter Interfering TX Victim R X

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

1850-1990 M H z Frequency Block A (upperpart) D (upperpart)
W orking Frequency (M H z)
N um berofguard channels 1943,750 1946,250
G uard Band betw een channeledges (KH z)
TX/R X frequency O ffset(KH z) 00

1250

2500,0

System D ata

TX Pow er(dBm ) 43

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

Antenna and FeederD ata

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

FeederLosses (dB) 2,0 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 1190,9
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
W hen both TX and R X are outofR X and TX antenna 3dB-beam w idth 5,5
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 1190,9 ###
1,50 ###
1,00 0,25 1721,8 ###
0,50 0,50 1437,3 ###
0,00 0,75 1289,2 ###
1,00 1190,9 ###
0,0 1,25 1117,8 ###
1,50 1060,0 ###
Required Distance (m) 1,75 1012,1
2,00 969,0
2,25 899,5
2,50 879,6
2,75 825,5
3,00 777,8

Inter-American Telecommunication Commission 65