Beamforming training in orthogonal frequency division multiple access (ofdma) communication systems

A method for beamforming training in a wireless communication network, the method comprising:

• transmitting, from a first communication device, a beamforming training packet to multiple second communication devices;
• generating, at the first communication device, a trigger frame to trigger an uplink orthogonal frequency division multiple access (OFDMA) transmission of beamforming training feedback from at least some of the multiple second communication devices;
• transmitting, with the first communication device and after transmission of the beamforming training packet by the first communication device, the trigger frame to the at least some of the multiple communication devices;
• and
• receiving, at the first communication device, the uplink OFDMA transmission, wherein the uplink OFDMA transmission includes respective beamforming training feedback packets generated based on the beamforming training packet by respective ones of the at least some of the multiple second communication devices, and wherein the respective beamforming training feedback packets are simultaneously transmitted by the at least some of the multiple second communication devices.