Configuring Mcs Rates - Allen-Bradley Stratix 5100 User Manual

Configuring MCS Rates

Table 82 - Data Rates Based on MCS Settings, Guard Interval, and Channel Width
MCS Index Guard Interval = 800 ns
20 Mhz Channel Width Data
Rate (Mbps)
0 6.5
1 13
20 Mhz Channel Width Data
Rate (Mbps)
2 19.5
3 26
4 39
5 52
6 58.5
7 65
8 13
9 26
10 39
Use the no form of the speed command to remove one or more data rates from
the configuration. This example shows how to remove data rates basic-2.0 and
basic-5.5 from the configuration:
ap1200# configure terminal
ap1200(config)# interface dot11radio 0
ap1200(config-if)# no speed basic-2.0 basic-5.5
ap1200(config-if)# end
Modulation Coding Scheme (MCS) is a specification of PHY parameters
consisting of modulation order (BPSK, QPSK, 16-QAM, 64-QAM) and FEC
code rate (1/2, 2/3, 3/4, 5/6). MCS is used in 802.11n radios, that define 32
symmetrical settings (8 per spatial stream):
• MCS 0–7
• MCS 8–15
• MCS 16–23
• MCS 24–31
MCS is an important setting because it provides for potentially greater
throughput. High throughput data rates are a function of MCS, bandwidth, and
guard interval. 802.11 a, b, and g radios use 20 MHz channel widths. This table
shows the potential data rates based on MCS, guard interval, and channel width.
TIP The 2.5 GHz radios don't support 40 MHz channel width.
40 Mhz Channel Width Data
Rate (Mbps)
13.5
27
40 Mhz Channel Width Data
Rate (Mbps)
40.5
54
81
109
121.5
135
27
54
81
Rockwell Automation Publication 1783-UM006A-EN-P - May 2014
Configuring Radio Settings
Guard Interval = 400 ns
20 Mhz Channel Width Data 40 Mhz Channel Width Data
Rate (Mbps) Rate (Mbps)
7 2/9 15
14 4/9 30
20 Mhz Channel Width Data 40 Mhz Channel Width Data
Rate (Mbps) Rate (Mbps)
21 2/3 45
28 8/9 60
43 1/3 90
57 5/9 120
65 135
72 2/9 152.5
14 4/9 30
28 8/9 60
43 1/3 90
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