Page 75 - GuideFWA

IN TER FER EN C E AN ALYSIS C ASE

Param eter Interfering TX Victim R X

System DECT IS95
D evice Term inal B ase Station

Frequency D ata

1850-1990 M H z Frequency Block 1910 -1930 M H z C (low erpart)
W orking Frequency (M H z)
N um berofguard channels 1912,896 1908,750
G uard Band betw een channeledges (KH z)
TX/R X frequency O ffset(KH z) 00

2657

4146,0

System D ata

TX Pow er(dBm ) 24

R X sensitivity (dBm ) **See N ote ** -120
-12
Specific C /Ivalue forR eceiverVictim System (dB)

Antenna and FeederD ata

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

FeederLosses (dB) 1,0 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 652,0
W hen only R X is on TX antenna 3dB-beam w idth 0,3
W hen only TX is on R X antenna 3dB-beam w idth 0,3
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:

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

2,50 1,0 652,0

Desentization (dB)2,00 0,25 1331,9 ###
0,50 928,1 ###
1,50 0,75 746,7 ###
1,00 652,0 ###
1,00 1,25 587,9 ###
1,50 528,6 ###
0,50 1,75 481,9 ###
2,00 443,9 ###
0,00 200,0 400,0 600,0 800,0 1000,0 1200,0 1400,0 2,25 412,1 ###
0,0 Required Distance (m) 2,50 389,3 ###
2,75 369,6
3,00 348,2

Inter-American Telecommunication Commission 61