Page 63 - GuideFWA
P. 63

IN TER FER EN C E AN ALYSIS C ASE

                                            Param eter                       Interfering TX           Victim R X

                    System                                                            PHS               PC S1900
                    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                                       1910,450           1909,800
                    G uard Band betw een channeledges (KH z)
                    TX/R X frequency O ffset(KH z)                                         00

                                                                                               400

                                                                                               650,0

                                                            System D ata

                    TX Pow er(dBm )                                                        19

                    R X sensitivity (dBm )  **See N ote **                                            -104
                                                                                                        9
                    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                                     1916,0
     W hen only R X is on TX antenna 3dB-beam w idth                                                        1,0
     W hen only TX is on R X antenna 3dB-beam w idth                                                        1,0
     W hen both TX and R X are outofR X and TX antenna 3dB-beam w idth                                      0,1

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       1000,0         2000,0      3000,0   4000,0                 1,0                 1916,0       ###
                  1,50                                                                                                   ###
                  1,00                                                              0,25                 3825,0          ###
                  0,50                                                              0,50                 2665,5          ###
                  0,00                                                              0,75                 2144,5          ###
                                                                                    1,00                 1916,0          ###
                        0,0                                                         1,25                 1767,8          ###
                                                                                    1,50                 1589,5          ###
                                     Required Distance (m)                          1,75                 1449,3
                                                                                    2,00                 1334,9
                                                                                    2,25                 1239,1
                                                                                    2,50                 1157,2
                                                                                    2,75                 1086,0
                                                                                    3,00                 1023,3

Inter-American Telecommunication Commission                                                                              49
   58   59   60   61   62   63   64   65   66   67   68