Patent ID: 8750253

Claim:
An apparatus for wireless communication, comprising: antenna arrangement comprising a set of virtual antenna ports, each virtual antenna port being a combination of one or more physical antenna ports of the antenna arrangement; and a first transceiver circuitry connected to the plurality of virtual antenna ports of the antenna arrangement, said first transceiver circuitry being configured to: communicate with a second transceiver circuitry via the virtual antenna ports of said antenna arrangement, receive primary beamshaping information related to a first signal transmitted from said first transceiver circuitry to said second transceiver circuitry, determine secondary beamshaping information related to a second signal transmitted from said second transceiver circuitry to said first transceiver circuitry, apply at least one weight vector based on said primary and secondary beamshaping information for subsequent transmission of signals from said first transceiver circuitry via the plurality of virtual antenna ports of said antenna arrangement, measure signal parameters related to said second signal to determine said secondary beamshaping information based on statistics of the measured signal parameters, and calculate direction of departure (DOD) variances of said primary and secondary beamshaping information to select the weight vector based on the calculated DOD variances.