Patent ID: 8284651

Claim:
A method for generating a preamble of a frame for a multiple input multiple output (MIMO) wireless communication, the method comprises: for each transmit antenna of the MIMO wireless communication, generating a carrier detect field, wherein, for a first grouping of the transmit antennas of the MIMO wireless communication: generating a first guard interval following the carrier detect field; generating at least one channel sounding field with respect to each transmit antennas of the first grouping, wherein the at least one channel sounding field follows the first guard interval; and for each transmit antenna of the first grouping, applying a cyclic shift to the at least one channel sounding field prior to transmission; and when the MIMO wireless communication includes more than the first grouping of the transmit antennas, for another grouping of the transmit antennas: generating at least one other channel sounding field for each transmit antenna of the another grouping, wherein, from transmit antenna to transmit antenna in the another grouping, the at least one other channel sounding field follows the at least one channel sounding field; and generating the first guard interval prior to the at least one other channel sounding field; and for each transmit antenna of the another grouping, applying another cyclic shift to the at least one other channel sounding field prior to transmission of the another grouping.