Multiple input multiple output (mimo) pilot transmission power

摘要

A method of adapting antenna pilot transmission power of an antenna provided in a multiple input multiple output (MIMO) wireless communication network; the pilot comprising: a common pilot transmittable at all times having a first transmission power; a scheduled pilot transmittable when said antenna is transmitting user data, the scheduled pilot having a second transmission power. A computer program product and network control node operable to perform the method. The method comprises: determining whether the antenna is transmitting user data; selecting a transmission power for the common pilot and the scheduled pilot such that the user data is demodulatable; and adapting the first and second transmission power in accordance with the selection. Aspects and embodiments described allow transmission power of a common pilot signal transmitted by an antenna to be adapted in dependence upon whether another pilot signal, for example, a scheduled pilot, is transmitted by that antenna.