Patent ID: 8259599

Claim:
A method comprising: receiving channel state information from users at least partially in response to transmission of a first beam from a base station; selecting a codeword to increase a carrier-to-caused-interference-plus-noise ratio of a second beam transmitted from the base station based, at least in part, on the received channel state information, wherein the carrier-to-caused-interference-plus-noise ratio is determined based at least in part on a ratio of carrier signal power of the second transmitted beam versus noise plus interference caused at least in part by the second transmitted beam; determining a transmit beamforming vector based at least in part on the codeword; and using the transmit beamforming vector for beamforming at least partially to generate the second transmitted beam; and iteratively selecting codewords to increase carrier-to-caused-interference-plus-noise ratio of at least one beam subsequently transmitted from the base station based, at least in part, on channel state information received at least partially in response to transmission of the second beam from the base station.