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LANCOM L-32x Access Point series
Chapter 5: Advanced wireless LAN configuration
59
EN
polarization-diversity antennas and one with normal outdoor antennas
with a single antenna connector).
With the 'Auto' setting all spatial streams that are supported by the
wireless LAN module in question are used.
Modulation Coding Scheme (MCS)
A specific MCS number denotes a unique combination from the modula-
tion of the individual carriers (BPSK, QPSK, 16QAM, 64QAM), coding rate
(i. e. proportion of error correction bits in the raw data and number of
spatial streams. 802.11n uses this term instead of the term "data rate"
used in older wireless LAN standards because data rate is no longer an
unequivocal description.
The MCS selection therefore indicates the type and minimum or maximum
number of modulation parameters that should be used for one or two
spatial data streams. Within these limits, the appropriate MCS is selected
MCS index Data streams Modulation Coding rate Data throughput
(GI=0.4 μs, 40 MHz)
01BPSK1/215
11QPSK1/230
21QPSK3/445
3 1 16QAM 1/2 60
4 1 16QAM 3/4 90
5 1 64QAM 1/2 120
6 1 64QAM 3/4 135
7 1 64QAM 5/6 150
8 2 BPSK 1/2 30
9 2 QPSK 1/2 60
10 2 QPSK 3/4 90
11 2 16QAM 1/2 120
12 2 16QAM 3/4 180
13 2 64QAM 1/2 240
14 2 64QAM 3/4 270
15 2 64QAM 5/6 300
60


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