SELECTION OF PRECODING VECTORS FOR RADIO BASE STATION WITH MULTIPLE ANTENNAS

摘要

The invention relates to a method for resource allocation in a radio communication system, which comprises a base station with at least two antenna elements and at least one mobile station. Each mobile station uses reference signals received from the base station as a measure of the channel in order to calculate a first utility value (for instance the data rate) which would be possible for each combination of precoding vectors used at that mobile station and at the other mobile stations. Each mobile station can then calculate a second utility value which would result for each combination of precoding vectors for each of a set of system descriptions (channel approximations). The mobile the selects the system description which gives the best match between first and second utility values and feeds it back to the base station. The base station tries out all combinations of precoding vectors with the system description which has been fed back to it, in order to find the combination which gives the best utility value.