Method and apparatus for beamforming

A beamforming system, the beamforming system comprising:

• a beamformer including a processor configured to:
• transmit a sounding packet that includes training symbols;
• receive a packet that includes two sets of symbols;
• operate according to the two sets of symbols included in the packet;
• a beamformee including a processor configured to:
• receive the sounding packet that includes the training symbols;
• derive channel estimates from the training symbols included in the sounding packet;
• compute a feedback matrix from the derived channel estimates;
• and
• transmit the packet that includes the two sets of symbols, wherein
• the feedback matrix is applied to at least one of the two sets of symbols.

A device, the device comprising:

• a processor configured to:
• operate as a beamformer, wherein operating as a beamformer involves:
• transmitting a sounding packet that includes training symbols;
• receiving a packet that includes two sets of symbols;
• operating according to the two sets of symbols included in the packet;
• and
• operate as a beamformee, wherein operating as a beamformee involves:
• receiving the sounding packet that includes the training symbols;
• deriving channel estimates from the training symbols included in the sounding packet;
• computing a feedback matrix from the derived channel estimates;
• and
• transmitting the packet that includes the two sets of symbols, wherein the feedback matrix is applied to at least one of the two sets of symbols.