METHOD AND RADIO NETWORK NODE FOR DETERMINING TOTAL RADIATED POWER FROM A PLURALITY OF ANTENNAS
FIG2 is a schematic drawing illustrating downlink transmissions from the radio network node of FIG1 where multiple antennas are deployed  FIG1 is a schematic diagram illustrating a cellular communication network where embodiments presented herein may be applied
FIG2 is a schematic drawing illustrating downlink transmissions from the radio network node 1 of FIG1 where multiple antennas are deployed. Specifically, it is here shown how the radio network node 1 comprises an AAS (Active Antenna System) and thus comprises a plurality of antennas. In this example, the radio network node 1 comprises eight antennas 6a-h. It is to be noted, however, that the radio network node can comprise any suitable number of antennas. The antennas 6a-h are here shown how they are used for downlink communication 4a from the radio network node to the wireless device 2, but the antennas can also be used for uplink communication, i.e. in the opposite direction.  FIG1 is a schematic diagram illustrating a cellular communication network 8 where embodiments presented herein may be applied. The cellular communication network 8 comprises a core network 3 and one or more radio network nodes 1, here in the form of radio base stations being evolved Node Bs, also known as eNode Bs or eNBs. The radio network node 1 could also be in the form of Node Bs, BTSs (Base Transceiver Stations) and/or BSSs (Base Station Subsystems), etc. The radio network node 1 provides radio connectivity over a wireless interface 4a-b to a plurality of wireless devices 2. The term wireless device is also known as mobile communication terminal, user equipment (UE), mobile terminal, user terminal, user agent, wireless terminal, machine-to-machine device etc., and can be, for example, what today are commonly known as a mobile phone, smart phone or a tablet/laptop with wireless connectivity. The term wireless is here to be construed as having the ability to perform wireless communication. More specifically, the wireless device 2 can comprise a number of wires for internal and/or external purposes.
schematic, schematic diagram
3
core network
2
wireless device wireless devices
1
radio network node radio network nodes
['1. A method for determining total radiated power from a plurality of antennas (6a-h) belonging to a radio network node, the method being performed in the radio network node (1) and comprising the step of: obtaining (44) an intermediate power value based on a sum of signals from couplers provided by each antenna of the plurality of antennas; characterized in  the further steps of: obtaining (40) antenna data affecting transmission weights applied for each individual antenna of the plurality of antennas; determining (46) a power factor based on the antenna data; and calculating (48) the total radiated power based on the intermediate power value and the power factor.']