Patent ID: 7551902

Claim:
An apparatus comprising: circuitry configured to provide at least one and fewer than all of a plurality of subcarriers to a first transmit antenna and circuitry configured to provide at least one and fewer than all of the plurality of the subcarriers to a second transmit antenna, where, during a transmission time when both the first and the second transmit antennas transmit data on their respective at least one and fewer than all of the plurality of the subcarriers, at least one of the plurality of the subcarriers provided to the first transmit antenna is not provided to the second transmit antenna and at least one of the plurality of the subcarriers provided to the second transmit antenna is not provided to the first transmit antenna, where said circuitry is configured to receive information regarding a channel, and, based on the received information, is configured to change an allocation of the multi-carrier frequency division multiplex system frequency sub-carriers to different ones of the at least two transmit antennas, wherein the apparatus increases a diversity order of the multi-carrier frequency division multiplex system, wherein each of the plurality of the subcarriers corresponds to a frequency band centered at a frequency different from frequencies at which others of the plurality of subcarriers are centered, wherein one of the first and second transmit antennas is configured to simultaneously transmit data on at least two subcarriers of the plurality of the subcarriers during the transmission time, wherein one of the first and second transmit antennas is configured to transmit data on fewer subcarriers than an other of the first and second transmit antennas during the transmission time.