Direction finding and FTM positioning in wireless local area networks

A wireless station comprising:

• a receiver that receives a plurality of direction finding (DF) sounding signals transmitted from an access point (AP) station via multiple antennas in a wireless local area network (WLAN);
• a storage device, arranged to store a program code;
• and
• a processor, arranged to execute the program code;
• wherein when loaded and executed by the processor, the program code instructs the processor to execute the following steps:
• estimating an AoD, which is an azimuth angle of the station from the AP, based on the plurality of DF sounding signals;
• determining a location of the station based on the estimated AoD;
• when a radial resolution error is larger than a threshold, performing a fine-timing measurement (FTM) procedure with the AP through transmitting an FTM request to the AP to determine a radial distance between the station and the AP;
• and
• updating the location of the station based on both the estimated AoD and the radial distance determined by the FTM procedure.