Patent attributes
In a method for beamforming in a multiple input multiple output (MIMO) communication system, a data unit from a second communication device is received at a first communication device via a MIMO communication channel. Training signals in the data unit are buffered in a memory of the first communication device, wherein buffering assumes that the data unit spans a bandwidth greater than a maximum bandwidth of a legacy first communication protocol. The first communication device determines whether the data unit is formatted according to a duplication mode in which a bandwidth portion of the data unit conforms to the legacy first communication protocol. If it is determined that the data unit is formatted according to the duplication mode, the first communication device utilizes a transmit beamforming matrix generated using the training signals buffered assuming that the data unit spans the bandwidth greater than the maximum bandwidth of the legacy first communication protocol.
