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Aver window

Viewing 6 posts - 1 through 6 (of 6 total)
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  • #59166 Reply
    Saga
    Guest

    Hi guys, can someone tell me.? How is the formula for averaging window for rxlevel?

    #59167 Reply
    Pix
    Guest

    Saga,

    if a_lev_ho = 4
    avg_rxlev = (rxlev1 + rxlev2 + rxlev3 + rxlev4) / 4

    rxlev1 being the last rxlev measurement (from last sacch)
    rxlev4 is the measurement from 4 SACCH ago.

    cheers,
    pix

    #59168 Reply
    Vanderley
    Guest

    Hi Saga,

    As a add-on to Pix calculation:
    Do not look theoretically on this. The guys crating the BSC logic do not know what is dBm.
    For them the average between -70 and -110dBm is… -90dBm and not the half of -70. Which is -73.
    The same is for the quality…

    #59169 Reply
    pix
    Guest

    vanderley : brilliant :))

    yet… you would want to do an average based on the mWatts ?
    avg(-70dBm, -90dBm) = (1e-7 milli watts + 0.01e-7 milli watts) / 2 = 0.505e-7 mw = -73dBm.

    Would you consider that a … valid average ?

    Now… imagine one measure at -70dBm. And 4 consecutive measures at -90dBm.

    what is the “mW” average ?

    -72.8dBm

    tuning the HO thresholds would be *really* fine tuning.

    #59170 Reply
    Vanderley
    Guest

    🙂 I know you gone like it.

    As a teacher of mine said long time ago:
    In theory and in practice is one thing… but in reality it something else.

    #59171 Reply
    Pix
    Guest

    You know me too well !

    Was I a teacher of yours ? :))

Viewing 6 posts - 1 through 6 (of 6 total)
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