Initial 802.11ac Wave 1 SU-MIMO (Single-User, Multiple Input, Multiple Output) technology allows an earlier-generation AP, such as the UniFi AC Pro AP, to communicate with only one client at a time. 802.11ac Wave 2 MU-MIMO (Multi-User, Multiple Input, Multiple Output) technology allows a Wave 2 AP, such as the UniFi HD AP, to communicate with multiple clients
at the same time – significantly increasing multi-user throughput and overall user experience.
The following describes a 5-client scenario: MU-MIMO Assuming the same conditions, a Wave 2 AP provides up to 75% improvement1
overall over a Wave 1 AP. This improvement increases wireless performance
and/or serves more clients at the same performance level.
4×4 Spatial Streams At any single time, a Wave 2 AP can
communicate with the following MU-MIMO clients:
• four 1×1 clients
• two 2×2 clients
• one 2×2 client and two 1×1 clients
• one 3×3 client and one 1×1 client
A 4×4 Wave 2 AP delivers up to 33% greater performance1 than a Wave 1 AP that is 3×3 in both radio bands. Real-World Performance The UniFi HD AP is the first UniFi 802.11ac Wave 2 AP. Combining the performance increases from MU-MIMO technology and the use of 4×4 spatial streams, the UniFi HD AP delivers up to 125% greater performance1 than a typical Wave 1 AP.
Client Compatibility For optimal performance, useMU‑MIMO clients. SU‑MIMO clients will also benefit and gain up to 10-20% greater performance when used with the UniFi HD AP.