Page 105 - GuideFWA

IN TER FER EN C E AN ALYSIS C ASE

Param eter Interfering TX Victim R X

System PC S1900 DECT
D evice B ase Station Term inal
Frequency D ata

1850-1990 M H z Frequency Block A (upperpart) 1910 -1930 M H z
W orking Frequency (M H z)
N um berofguard channels 1930,200 1928,448
G uard Band betw een channeledges (KH z)
TX/R X frequency O ffset(KH z) 00

788

1752,0

System D ata

TX Pow er(dBm ) 46

R X sensitivity (dBm ) **See N ote ** -76
10
Specific C /Ivalue forR eceiverVictim System (dB)

Antenna and FeederD ata

Antenna heigth (m ) 25,0 8,0
Antenna G ain (dBi) 17,0 10,0
Antenna H orizontalBeam w idth (º) 105 60
Antenna VerticalBeam w idth (º) 60
Antenna D ow ntilt(º) 9
-3 2

FeederLosses (dB) 2,0 1,0

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 (10 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 748,3
W hen only R X is on TX antenna 3dB-beam w idth 0,4
W hen only TX is on R X antenna 3dB-beam w idth 0,4
W hen both TX and R X are outofR X and TX antenna 3dB-beam w idth 0,0

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 1,0 748,3 ###
1,50 ###
1,00 0,25 1564,2 ###
0,50 0,50 1090,1 ###
0,00 0,75 877,0 ###
1,00 748,3 ###
0,0 1,25 659,3 ###
1,50 620,8 ###
Required Distance (m) 1,75 566,0
2,00 521,3
2,25 483,9
2,50 452,0
2,75 424,2
3,00 399,7

Inter-American Telecommunication Commission 91