Xirrus XR-520, User Manual

Page: 60 / 178

Wireless Array
38 Installing the Wireless Array
The techniques that 802.11ac uses to realize these performance improvements and
the expected results are discussed in:

“Up to Eight Simultaneous Data Streams — Spatial Multiplexing” on
page 39

“MIMO (Multiple-In Multiple-Out)” on page 39

“MU-MIMO (Multi-User Multiple-In Multiple-Out)” on page 40

“Higher Precision in the Physical Layer” on page 42

“80 MHz and 160 MHz Channel Widths (Bonding)” on page 43

“802.11ac Data Rates” on page 44

“ACExpress™” on page 45
It is important to consider 80 MHz and 160 MHz Channel Widths (Bonding) when
planning your deployment, since it contributes greatly to 802.11ac’s speed
improvements and because it is configured separately for each IAP. Your
selection of channel width in
IAP Settings —40 MHz or 80 MHz or 20 MHz (if
bonding is turned off)—has a major effect on your channel planning. A global
setting is provided to enable or disable 802.11ac mode. See
“Global Settings .11ac”
on page 325 to configure operation.
There are other factors to keep in mind when planning a roll-out of 802.11ac.
Please see
“802.11ac Deployment Considerations” on page 45 .