Patent ID: 8588694

Claim:
A method performed in a scheduler connected to a transmitter unit of a multi-antenna system for scheduling of user equipments in one or more subsequent time slots, wherein each user equipment includes a receiver unit, said method comprising: determining signal processing capabilities including one or more weighting parameters for signal suppression or signal enhancement properties of the receiver units; scheduling one or more user equipments for a beamforming transmission of data streams based on at least said signal processing capabilities of the respective receiver units; calculating antenna weights for each scheduled receiver unit by: weighting, for receiver units other than the scheduled receiver unit, each interfering signal component with a corresponding receiver-specific interference suppression parameter δ, wherein the corresponding receiver-specific interference suppression parameter δ relates to the capability of the scheduled receiver unit to suppress interference resulting from the interfering signal component; determining a transmission signal x(t) at the antenna array of the transmitter unit from the weighted signal components and a corresponding antenna propagation vector for each receiver unit; deriving the antenna weights w opt,m from a covariance matrix for the transmission signal and covariances between said transmission signal and desired communication signals for the scheduled receiver units, or sufficient approximations of the desired communication signals; and initiating transmission of data streams to the scheduled user equipments, according to the calculated antenna weights.