How to calculate LTE Average CQI?

4G LTE
2

Create this formula

NOM:
1*L.ChMeas.CQI.DL.1 + 2*L.ChMeas.CQI.DL.2 + 3*L.ChMeas.CQI.DL.3 + 4*L.ChMeas.CQI.DL.4 +....... +15*L.ChMeas.CQI.DL.15
/
DENOM:
L.ChMeas.CQI.DL.1 + L.ChMeas.CQI.DL.2 + L.ChMeas.CQI.DL.3 +...... +L.ChMeas.CQI.DL.15