EIRP and MIMO

[edgar05]

Hi Experts,

I'm a little confused on EIRP calculation when MIMO 2x4 is implemented.

If my RRU is 40W(46dBm) I understand that half of the power goes to each TX antenna (43dBm per branch) Considering an antenna gain of 18dBi and 1dB of losses due to connectors & jumpers. Should my EIRP calculation be based on 43dBm or on 46dBm?

43 + 18 - 1 = 60
46 + 18 - 1 = 63

Which one is correct?

I appreciate your support