Patent ID: 8576695

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, at least one channel sounding field with respect to each transmit antenna of the first grouping, and at least one channel sounding field; 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; 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.