Patent ID: 8503562

Claim:
A method for transmitting orthogonal frequency division multiplexed (OFDM) symbols in accordance with a multiple-input-multiple-output (MIMO) technique performed by a transmitter coupled to first and second antennas, the method comprising: selecting a coding mode for groups of subcarriers based on channel state information (CSI) indicating channel state for the groups of subcarriers, wherein the coding mode is selected from a diversity mode and a multiplexing mode; mapping symbols of a data stream to generate first mapped symbols and second mapped symbols; transmitting the first mapped symbols with the first antenna on subcarriers that include the groups of subcarriers selected for the diversity mode and the groups of subcarriers selected for the multiplexing mode; transmitting at least some of the first mapped symbols with the second antenna on the groups of subcarriers selected for the diversity mode, transmission of the at least some of the first mapped symbols with the second antenna being delayed with respect to transmission of the first mapped symbols with the first antenna, the delay being greater than zero and less than a cyclic prefix length; transmitting the second mapped symbols with the second antenna on the groups of subcarriers selected for multiplexing mode; and transmitting coding group information (CGI) to indicate the selected coding mode for each group of subcarriers.