Operating method of wireless local area network station

摘要

A method of operating a wireless local area network (WLAN) station. The WLAN station receives at least one desired signal and at least one interference signal from an access point (AP) capable of simultaneously transmitting desired signals to multiple WLAN stations. The method includes estimating a channel and generating a channel matrix estimated based on the estimated channel, separating a channel matrix of the desired signal and a channel matrix of the interference signal from the estimated channel matrix, generating the matrix of a virtual channel by combining the separated channel matrixes, and executing a sphere decoding (SD) algorithm using the matrix of the virtual channel.;Or, separating a desired signal and an interference signal from the stream signal based on the analysis result, ascertaining a modulation scheme of the interference signal, and setting the ascertained modulation scheme of the interference signal as decreased lattice points.

主权项

1. An operating method of a wireless local area network (WLAN) station configured to receive a desired signal and at least one interference signal through each of at least two station antennas from an access point (AP) including at least two AP antennas and supporting down-link (DL) multiple user multiple input multiple output (MU-MIMO), the method comprising:
estimating a channel and generating an estimated channel matrix based on the estimated channel; separating a channel matrix of the desired signal and a channel matrix of the interference signal from the estimated channel matrix; detecting the desired signal using the separated channel matrix of the desired signal; detecting the interference signal using the separated channel matrix of the interference signal; creating a precoding matrix using channel state information (CSI); multiplying, wherein the multiplying is performed by the AP, the precoding matrix by a stream signal; and transmitting, wherein the AP performs the transmitting, the multiplication result to the WLAN station through at least one of the AP antennas.