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ANALYTICAL APPROACH

• It is the least-interfered channel that is of interest, NOT the interference
    from neighboring FWA sites.

• The effect of FWA therefore cannot in general be analyzed by simply
    subtracting the Erlangs used by the nearest FWA from the total “available
    Erlangs”; that would ignore the effect of all but the nearest FWA
    transmitters.

• The actual interference power on the least-interfered channel must be
    computed.

• This is easily done using standard Monte Carlo techniques as described in
    the paper.

INTERFERENCE DISTRIBUTION - MICROBASESPr{I < x} (percent)

      99

      90
                                                 Distribution of

      70 interference on
      50 arbitrary channel
      30 Distribution of interference on

                                   least-interfered FWA channel
      10

       1
        -70 -65 -60 -55 -50 -45

                                      x (dBm)

Inter-American Telecommunication Commission                                     367
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