The following table provides a summary of the modulation and coding scheme for payload characteristics in 802.11n.
|
MCS Index |
Number of spatial streams |
Modulation |
Coding rate |
NES |
NSD |
NCBPS |
Data Rate (in Mbps) (GI = 800ns) |
Data Rate (in Mbps) (GI = 400ns) |
|||||
|
20MHz |
40MHz |
20MHz |
40MHz |
20MHz |
40MHz |
20MHz |
40MHz |
20MHz |
40MHz | ||||
|
0 |
1 |
BPSK |
1/2 |
1 |
1 |
52 |
108 |
52 |
108 |
6.5 |
13.5 |
7 2/9 |
15 |
|
1 |
1 |
QPSK |
1/2 |
1 |
1 |
52 |
108 |
104 |
216 |
13 |
27 |
14 4/9 |
30 |
|
2 |
1 |
QPSK |
3/4 |
1 |
1 |
52 |
108 |
104 |
216 |
19.5 |
40.5 |
21 2/3 |
45 |
|
3 |
1 |
16-QAM |
1/2 |
1 |
1 |
52 |
108 |
208 |
432 |
26 |
54 |
28 8/9 |
60 |
|
4 |
1 |
16-QAM |
3/4 |
1 |
1 |
52 |
108 |
208 |
432 |
39 |
81 |
43 1/3 |
90 |
|
5 |
1 |
64-QAM |
2/3 |
1 |
1 |
52 |
108 |
312 |
648 |
52 |
108 |
57 7/9 |
120 |
|
6 |
1 |
64-QAM |
3/4 |
1 |
1 |
52 |
108 |
312 |
648 |
58.5 |
121.5 |
65 |
135 |
|
7 |
1 |
64-QAM |
5/6 |
1 |
1 |
52 |
108 |
312 |
648 |
65 |
135 |
72 2/9 |
157.5 |
|
8 |
2 |
BPSK |
1/2 |
1 |
1 |
52 |
108 |
104 |
216 |
13 |
27 |
14 4/9 |
30 |
|
9 |
2 |
QPSK |
1/2 |
1 |
1 |
52 |
108 |
208 |
432 |
26 |
54 |
28 8/9 |
60 |
|
10 |
2 |
QPSK |
3/4 |
1 |
1 |
52 |
108 |
208 |
432 |
39 |
81 |
43 1/3 |
90 |
|
11 |
2 |
16-QAM |
1/2 |
1 |
1 |
52 |
108 |
416 |
864 |
52 |
108 |
57 7/9 |
120 |
|
12 |
2 |
16-QAM |
3/4 |
1 |
1 |
52 |
108 |
416 |
864 |
78 |
162 |
86 2/3 |
180 |
|
13 |
2 |
64-QAM |
2/3 |
1 |
1 |
52 |
108 |
624 |
1296 |
104 |
216 |
115 5/9 |
240 |
|
14 |
2 |
64-QAM |
3/4 |
1 |
1 |
52 |
108 |
624 |
1296 |
117 |
243 |
130 |
270 |
|
15 |
2 |
64-QAM |
5/6 |
1 |
1 |
52 |
108 |
624 |
1296 |
130 |
270 |
144 4/9 |
300 |
|
16 |
3 |
BPSK |
1/2 |
2 |
2 |
52 |
108 |
156 |
324 |
19.50 |
40.50 |
21.67 |
45.00 |
|
17 |
3 |
QPSK |
1/2 |
2 |
2 |
52 |
108 |
312 |
648 |
39.00 |
81.00 |
43.33 |
90.00 |
|
18 |
3 |
QPSK |
3/4 |
2 |
2 |
52 |
108 |
312 |
648 |
58.50 |
121.50 |
65.00 |
135.00 |
|
19 |
3 |
16-QAM |
1/2 |
2 |
2 |
52 |
108 |
624 |
1296 |
78.00 |
162.00 |
86.67 |
180.00 |
|
20 |
3 |
16-QAM |
3/4 |
2 |
2 |
52 |
108 |
624 |
1296 |
117.00 |
243.00 |
130.00 |
270.00 |
|
21 |
3 |
64-QAM |
2/3 |
2 |
2 |
52 |
108 |
936 |
1944 |
156.00 |
324.00 |
173.33 |
360.00 |
|
22 |
3 |
64-QAM |
3/4 |
2 |
2 |
52 |
108 |
936 |
1944 |
175.50 |
364.50 |
195.00 |
405.00 |
|
23 |
3 |
64-QAM |
5/6 |
2 |
2 |
52 |
108 |
936 |
1944 |
195.00 |
405.00 |
216.67 |
450.00 |
|
24 |
4 |
BPSK |
1/2 |
2 |
2 |
52 |
108 |
208 |
432 |
26.00 |
54.00 |
28.89 |
60.00 |
|
25 |
4 |
QPSK |
1/2 |
2 |
2 |
52 |
108 |
416 |
864 |
52.00 |
108.00 |
57.78 |
120.00 |
|
26 |
4 |
QPSK |
3/4 |
2 |
2 |
52 |
108 |
416 |
864 |
78.00 |
162.00 |
86.67 |
180.00 |
|
27 |
4 |
16-QAM |
1/2 |
2 |
2 |
52 |
108 |
832 |
1728 |
104.00 |
216.00 |
115.56 |
240.00 |
|
28 |
4 |
16-QAM |
3/4 |
2 |
2 |
52 |
108 |
832 |
1728 |
156.00 |
324.00 |
173.33 |
360.00 |
|
29 |
4 |
64-QAM |
2/3 |
2 |
2 |
52 |
108 |
1248 |
2592 |
208.00 |
432.00 |
231.11 |
480.00 |
|
30 |
4 |
64-QAM |
3/4 |
2 |
2 |
52 |
108 |
1248 |
2592 |
234.00 |
486.00 |
260.00 |
540.00 |
|
31 |
4 |
64-QAM |
5/6 |
2 |
2 |
52 |
108 |
1248 |
2592 |
260.00 |
540.00 |
288.89 |
600.00 |
|
32 |
1 |
BPSK |
1/2 |
1 |
1 |
|
48 |
|
48 |
|
6 |
|
6.67 |
Table 1 - MIMO Modulation and Coding Schemes
The parameters in the table are:
NES: Number of FEC encoders used
NSD: Number of Data Subcarriers
NCBPS: Number of Code Bits Per Symbol (total of all spatial streams)
GI: Guard Interval
The following figure is an illustration of the 802.11n A-MPDU (Aggregation MAC Protocol Data Unit) payload structure. A-MPDU allows aggregation of multiple MPDUs (MAC protocol data unit) in one PSDU (PHY service data unit). The description and details of the medium access control (MAC) header and frame check sequence (FCS) can be found in the IEEE 802.11 legacy standard. The MAC header and FCS state can be turned ON or OFF. All the fields in the MAC header can be modified.