Systems and methods for suppressing interference in a wireless communication system

A method for suppressing interference from a data signal received at a receiving device, the receiving device having m receive antennas, the method comprising:

• receiving, at the receiving device, a training signal set transmitted from a first transmitting device, wherein the training signal set includes data for each transmit antenna of n transmit antennas included on the first transmitting device, wherein the training signal set includes information sufficient to determine a channel estimate corresponding to a communication channel between the first transmitting device and the receiving device, wherein the training signal set is included in a sounding packet transmitted from the first transmitting device to the receiving device, and wherein the data for each transmit antenna of the n transmit antennas comprises long training fields (LTFs) or extended long training fields (E-LTFs) that are included in a preamble portion of the sounding packet, wherein the sounding packet comprises,
• physical layer (PHY) information including the training signal set,
• information indicating that the sounding packet is to be processed by the receiving device for suppressing the interference at the receiving device, and
• media access control (MAC) information including i) a source address of the first transmitting device, and ii) an identifier for a basic service set (BSS) in which the first transmitting device is included;
• determining the channel estimate based on the received training signal set, wherein the channel estimate includes an m-by-n description of the communication channel that is determined based on the data for each transmit antenna of the n transmit antennas;
• and
• filtering, based on the determined channel estimate, the data signal received at the receiving device to suppress the interference in the data signal, the data signal having been transmitted from a second transmitting device that is different from the first transmitting device.