A method and apparatus are provided for allocating and transmitting groups of subcarriers, called tiles, between a plurality of transceiver antennas. The method includes receiving at least one downlink signal by a subscriber station transceiver through at least one of the plurality of subscriber station antennas, characterizing a received signal of at least one downlink signal over multiple subcarriers, and allocating tiles for uplink transmission through at least one of the plurality of transceiver antennas. The tiles allocation is based on the characterized received signal of the at least one downlink signal over multiple subcarriers and is based on a required power Ptx for uplink transmission compared with a maximum power P that each of the plurality of the transceiver antennas can emit.