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| MCS Index | Modulation | Rate Code | NBPSCS(iSS) | NSD | NSP | NCBPS | NDBPS | Rate Mb/s @ 20MHz | Rate Mb/s@ 40MHz | ||
| (20MHz/40MHz) | (20MHz/40MHz) | (20MHz/40MHz) | (20MHz/40MHz) | 800ns GI | 400ns GI | 800ns GI | 400ns GI | ||||
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| 0 | BPSK | 1/2 | 1 | 52/108 | 4/6 | 52/108 | 26/54 | 6.5 | 7.2 | 13.5 | 15.0 |
| 1 | QPSK | 1/2 | 2 | 52/108 | 4/6 | 104/216 | 52/108 | 13.0 | 14.4 | 27.0 | 30.0 |
| 2 | QPSK | 3/4 | 2 | 52/108 | 4/6 | 104/216 | 78/162 | 19.5 | 21.7 | 40.5 | 45.0 |
| 3 | 16-QAM | 1/2 | 4 | 52/108 | 4/6 | 208/432 | 104/216 | 26.0 | 28.9 | 54.0 | 60.0 |
| 4 | 16-QAM | 3/4 | 4 | 52/108 | 4/6 | 208/432 | 156/324 | 39.0 | 43.3 | 81.0 | 90.0 |
| 5 | 64-QAM | 2/3 | 6 | 52/108 | 4/6 | 312/648 | 208//432 | 52.0 | 57.8 | 108.0 | 120.0 |
| 6 | 64-QAM | 3/4 | 6 | 52/108 | 4/6 | 312/648 | 234/486 | 58.5 | 65.0 | 121.5 | 135.0 |
| 7 | 64-QAM | 5/6 | 6 | 52/108 | 4/6 | 312/648 | 260/540 | 65.0 | 72.2 | 135.0 | 150.0 |
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| 8 | BPSK | 1/2 | 1 | 52/108 | 4/6 | 104/216 | 52/108 | 13.0 | 14.4 | 27.0 | 30.0 |
| 9 | QPSK | 1/2 | 2 | 52/108 | 4/6 | 208/432 | 104/216 | 26.0 | 28.9 | 54.0 | 60.0 |
| 10 | QPSK | 3/5 | 2 | 52/108 | 4/6 | 208/432 | 156/324 | 39.0 | 43.3 | 81.0 | 90.0 |
| 11 | 16-QAM | 1/2 | 4 | 52/108 | 4/6 | 416/864 | 208/432 | 52.0 | 57.8 | 108.0 | 120.0 |
| 12 | 16-QAM | 3/4 | 4 | 52/108 | 4/6 | 416/864 | 312/648 | 78.0 | 86.7 | 162.0 | 180.0 |
| 13 | 64-QAM | 2/3 | 6 | 52/108 | 4/6 | 624/1296 | 416/864 | 104.0 | 115.6 | 216.0 | 240.0 |
| 14 | 64-QAM | 3/4 | 6 | 52/108 | 4/6 | 624/1296 | 468/972 | 117.0 | 130.0 | 243.0 | 270.0 |
| 15 | 64-QAM | 5/6 | 6 | 52/108 | 4/6 | 624/1296 | 520/1080 | 130.0 | 144.4 | 270.0 | 300.0 |
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| 16 | BPSK | 1/2 | 1 | 52/108 | 4/6 | 156/324 | 78/162 | 19.5 | 21.7 | 40.5 | 45.0 |
| 17 | QPSK | 1/2 | 2 | 52/108 | 4/6 | 312/648 | 156/324 | 39.0 | 43.3 | 81.0 | 90.0 |
| 18 | QPSK | 3/5 | 2 | 52/108 | 4/6 | 312/648 | 234/486 | 58.5 | 65.0 | 121.5 | 135.0 |
| 19 | 16-QAM | 1/2 | 4 | 52/108 | 4/6 | 624/1296 | 312/648 | 78.0 | 87.6 | 162.0 | 180.0 |
| 20 | 16-QAM | 3/4 | 4 | 52/108 | 4/6 | 624/1296 | 468/972 | 117.0 | 130.0 | 243.0 | 270.0 |
| 21 | 64-QAM | 2/3 | 6 | 52/108 | 4/6 | 936/1944 | 624/1296 | 156.0 | 173.3 | 324.0 | 360.0 |
| 22 | 64-QAM | 3/4 | 6 | 52/108 | 4/6 | 936/1944 | 702/1458 | 175.5 | 195.0 | 364.5 | 405.0 |
| 23 | 64-QAM | 5/6 | 6 | 52/108 | 4/6 | 936/1944 | 780/1620 | 195.0 | 216.7 | 405.0 | 450.0 |
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| 24 | BPSK | 1/2 | 1 | 52/108 | 4/6 | 208/432 | 104/216 | 26.0 | 28.9 | 54.0 | 60.0 |
| 25 | QPSK | 1/2 | 2 | 52/108 | 4/6 | 416/864 | 208/432 | 52.0 | 57.8 | 108.0 | 120.0 |
| 26 | QPSK | 3/5 | 2 | 52/108 | 4/6 | 416/864 | 312/648 | 78.0 | 86.7 | 162.0 | 180.0 |
| 27 | 16-QAM | 1/2 | 4 | 52/108 | 4/6 | 832/1728 | 416/864 | 104.0 | 115.6 | 216.0 | 240.0 |
| 28 | 16-QAM | 3/4 | 4 | 52/108 | 4/6 | 832/1728 | 624/1296 | 156.0 | 173.3 | 324.0 | 360.0 |
| 29 | 64-QAM | 2/3 | 6 | 52/108 | 4/6 | 1248/2592 | 832/1728 | 208.0 | 231.1 | 432.0 | 480.0 |
| 30 | 64-QAM | 3/4 | 6 | 52/108 | 4/6 | 1248/2592 | 936/1944 | 234 | 260.0 | 486.0 | 540.0 |
| 31 | 64-QAM | 5/6 | 6 | 52/108 | 4/6 | 1248/2592 | 1040/2160 | 260.0 | 288.9 | 540.0 | 600.0 |
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| 32 | BPSK | 1/2 | 1 | NA/48 | NA/4 | NA/48 | NA/24 | NA | NA | 6.0 | 6.7 |
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NBPSCS(iSS) = Number of coded bits per single carrier
NSD = Number of data sub-carriers
NSP = Number of pilot sub-carriers (used for pilot tracking)
NCBPS = Number of coded bits per OFDM symbol
NDBPS = Number of data bits per OFDM symbol
MCS 0 – 7 are for 1×1 MIMO (1 spacial stream), MCS 8 – 15 are 2×2 MIMO (2 spacial streams). MCS 16 – 23 are 3×3 MIMO (3 spacial streams) and MCS 24 – 31 are for 4×4 MIMO (4 spacial streams).
Ο vendor are obliged to support MCS 0 – 15 depending on weather they implement 1×1 or 2×2 MIMO at 20MHz. Support for 40MHz and the rest of MCS is optional.
MCS 32 is special for high noise environments and it basically does duplication of data, its BPSK with 1 spacial stream in 40MHz only and with max rate 6.7Mb/s .
MCS 33 – 76 are in unequal modulation of 2 spacial streams upwards, in other words every stream has different modulation (QPSK/QAM), the 33 – 38 has 2 streams (max 108.3Mb/s @ 20MHz, 225Mb/s @ 40MHz), 39 – 52 has 3 streams (max 173,3Mb/s @20MHz, 360Mb/s @ 40MHz) and 53 – 76 has 4 streams (max 238Mb/s @ 20MHz, 495Μb/s @ 40MHz). The purpose is to have flexibility and better adaptivity to environment conditions (all this provided there is in place an advanced rate control algorithm that takes into account many different parameters).
MCS 77 – 127 are reserved.
-Mick Flemm
