Method for performing training for signal beamforming in wireless LAN system, and device for same

A station device for performing beamforming training for frequency division multiple access (FDMA) transmission in a wireless Local Area Network (WLAN) system, the device comprising:

• a transceiver having one or more radio frequency (RF) chains and configured to transmit and receive signals with one or more other station devices;
• and
• a processor connected to the transceiver to process the signals transmitted and received with the one or more other station devices,
• wherein the processor is configured to:
• transmit a beamforming setup frame including identification (ID) information of the one or more other STAs belonging to one FDMA group and beamforming training operation information;
• based on the beamforming training operation information, perform FDMA beamforming training by simultaneously using a plurality of transmission sectors,
• wherein the beamforming training operation information comprises beamforming training order information for each combination of the plurality of transmission sectors;
• receive a feedback result of the FDMA beamforming training from the one or more other STAs;
• and
• transmit a selection frame including FDMA transmission setup information and channel allocation information for each STA that are determined based on the received feedback result.