Patent ID: 8027243

Claim:
A method comprising: transmitting, by a base station to a mobile station with dual antennas, a radio resource allocation map, wherein the radio allocation map comprises an information element (IE) for controlling transmission of uplink data to the base station, wherein the information element (IE) comprises a pilot pattern indicator for indicating pilot patterns used to transmit the uplink data through the dual antennas by the mobile station; and receiving, by the base station, the uplink data from the mobile station, wherein the received uplink data is sent from the mobile station via a first antenna of the dual antennas in units of a first tile comprising a plus pilot located at a lower left corner of the first tile, a minus pilot located at an upper right corner of the first tile, and a null subcarrier located at an upper left corner of the first tile and a lower right corner of the first tile, wherein the received uplink data is sent from the mobile station via a second antenna of the dual antennas in units of a second tile comprising a minus pilot located at an upper left corner of the second tile, a plus pilot located at a lower right corner of the second tile, and a null subcarrier located at a lower left corner of the second tile and an upper right corner of the second tile, and wherein pilot patterns of the first tile and the second tile are determined by a value of the pilot pattern indicator.