OFDMA sounding for WLAN system

An access point for facilitating communication in a wireless network for multi-user transmission, the access point comprising:

• one or more memories;
• and
• one or more processors coupled to the one or more memories, the one or more processors configured to cause:
• transmitting a first frame to one or more stations, wherein the first frame indicates whether a first type of feedback or a second type of feedback is requested;
• transmitting a second frame to the one or more stations;
• receiving a third frame from a first station of the one or more stations, wherein the third frame comprises a beamforming report that includes a first plurality of average signal-to-noise ratio (SNR) values for the first and second types of feedback, wherein each of the first plurality of average SNR values is associated with a respective subband of a bandwidth, wherein a size of each respective subband is 26 tones, and wherein the 26 tones correspond to 26 tones in a smallest resource unit of a numerology of orthogonal frequency division multiple access (OFDMA) transmission associated with a channel bandwidth of the second frame, and wherein the beamforming report includes a delta SNR value for each reported subcarrier of the respective subband of the bandwidth when the first frame indicates that the second type of feedback is requested, the delta SNR value indicating a deviation of an SNR value of a reported subcarrier relative to an average SNR value averaged over subcarriers for a subband of the bandwidth;
• and
• generating a beamforming matrix based at least on the third frame,
• wherein the first frame comprises station-specific information associated with an allocation of subbands of the bandwidth.

A computer-implemented method of facilitating communication in a wireless network for multi-user transmission, the method comprising:

• receiving a first frame, wherein the first frame indicates whether a first type of feedback or a second type of feedback is requested;
• receiving a second frame subsequent to receiving the first frame, the second frame is associated with the first frame;
• generating a beamforming report, wherein the beamforming report comprises one or more of average signal-to-noise ratio (SNR) values for the first and second types of feedback, wherein each of the one or more of the average SNR values is associated with a respective subband of a bandwidth, wherein a size of each respective subband is 26 tones, wherein the 26 tones correspond to 26 tones in a smallest resource unit of a numerology of orthogonal frequency division multiple access (OFDMA) transmission associated with a channel bandwidth of the second frame, and wherein the beamforming report includes a delta SNR value for each reported subcarrier of the respective subband of the bandwidth when the first frame indicates that the second type of feedback is requested, the delta SNR value indicating a deviation of an SNR value of a reported subcarrier relative to an average SNR value averaged over subcarriers for a subband of the bandwidth;
• and
• transmitting a third frame comprising the beamforming report,
• wherein the first frame comprises station-specific information associated with an allocation of subbands of the bandwidth.