TECHNIQUES FOR MULTI-USER MIMO SOUNDING IN WIRELESS NETWORKS

摘要

An embodiment of the present invention provides an apparatus, comprising a transceiver operable as an access point and capable of communicating in a wireless network, the AP adapted to perform a down link multi user - multiple input multiple output (DL MU-MIMO) transmission and further adapted to transmit a null data packet (NDP) to sound channels between intended recipient wireless stations (STAs), and wherein following a DL MU-MIMO transmission of the NDP, the AP polls each of the STAs in turn for channel state information.