Patent ID: 8483200

Claim:
A method for use in a wireless transmit/receive unit (WTRU), the method comprising: selecting an antenna mapping from a plurality of currently available antenna mappings, wherein the selected antenna mapping includes a combination of a radio frequency chain, an antenna selected from a plurality of antennas including at least one beamforming antenna, and an antenna beam selected from a plurality of antenna beams associated with the antenna; calibrating the selected antenna mapping, wherein the calibrating includes: transmitting an indication to commence calibration; and receiving a sounding physical layer packet data unit (PPDU) in response to the transmitting the indication to commence calibration; estimating a channel associated with the selected antenna mapping based on the received PPDU; generating a steering matrix associated with the antenna beam of the selected antenna mapping based on the estimated channel; and transmitting a data packet to a second WTRU using the calibrated selected antenna mapping and the steering matrix.