This paper examines the limitations of MIMO technology in current Wi-Fi networks. It also explains the MU-MIMO feature of the IEEE 802.11ac standard and the need for MU-MIMO to continue to achieve higher efficiency in Wi-Fi networks and devices. It discusses interactions between features and design challenges as
well as the tradeoffs required to create a practical MU-MIMO solution to help 802.11ac Wi-Fi products deliver the
best possible performance and to ensure future designs realize the full potential of the 802.11ac standard.