![Xirrus Wi-Fi Array XS-3500 User Manual Download Page 87](http://html.mh-extra.com/html/xirrus/wi-fi-array-xs-3500/wi-fi-array-xs-3500_user-manual_887577087.webp)
Wi-Fi Array
Installing the Wi-Fi Array
65
inappropriate environment, the signal quality will suffer and throughput will
decrease. See
“Global Settings .11n” on page 273
to configure the guard interval.
Obtaining Higher Data Rates
The data rate increase obtained by using 802.11n on an Array is incremental,
based on the technologies that are applied and the options that you select:
z
Higher encoding rates (Mandatory in 802.11n)
z
Spatial Streams (Mandatory, but multiplier varies directly with number of
streams selected.)
z
Channel Bonding (Mandatory in 802.11n, apply multiplier to IAP if it is
bonded.)
z
Short Guard Interval (Optional)
See
Figure 27
to compute your 802.11n data rate increase for an IAP. Apply this
increase to the 802.11 a, b or g data rates selected for the Array.
Figure 27. Computing 802.11n Data Rates
Optionally
Multiply By 2.077
to Bond
Two 20MHz
Channels
Optionally
Multiply by 1.11 for
Shorter Guard Interval
to Increase
Symbol Rate
Optionally
Multiply by 2, 3, 4
for the Number of
Additional
Spatial Streams
Choose New Base
En Modulation
BPSK (6.5)
QPSK (13, 19.5)
QAM-16 (26, 39)
QAM-64 (58.5, 65)
New 11n
Data Rate
x
x
x
=
Expected First Generation Device Data Rates
Expected 802.11n Data Rates
802.11a 802.11g
Rates
6
9
12
18
24
36
48
54
11n Mandatory
Data Rates
6.5
13
19.5
26
39
52
58.5
65
With Channel
Bonding (40MHz)
13.5
27
40.5
54
81
108
121.5
135
With Short
Guard Interval
15
30
45
60
90
120
135
150
Two Spatial
Streams
13
26
39
52
78
104
117
130
With Channel
Bonding (40MHz)
27
54
81
108
162
216
243
270
With Short
Guard Interval
30
60
90
120
180
240
270
300
One Spatial Stream
Two Spatial Streams
Summary of Contents for Wi-Fi Array XS-3500
Page 1: ...October 28 2009 ...
Page 2: ......
Page 15: ...Wi Fi Array Table of Contents xi Glossary of Terms 455 Index 467 ...
Page 16: ...Wi Fi Array xii Table of Contents ...
Page 140: ...Wi Fi Array 118 Installing the Wi Fi Array ...
Page 196: ...Wi Fi Array 174 Viewing Status on the Wi Fi Array ...