PHY spec, v1.27
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Contents 1
1 Introduction................................................................................................................. 7 2
2 PHY Interface ............................................................................................................. 7 3
3 PLCP packet format.................................................................................................... 7 4
3.1 Operating Mode .................................................................................................. 8 5
3.2 Modulation and Coding Scheme (MCS)............................................................. 9 6
3.3 Transmitter Block Diagram (this section is informative) ................................. 10 7
3.4 Mathematical description of signals ................................................................. 12 8
3.4.1 Transmission in the upper/lower 20MHz of a 40MHz channel................ 17 9
3.5 Legacy Field Transmission............................................................................... 17 10
3.5.1 Cyclic shift definition for the legacy fields............................................... 17 11
3.5.2 Legacy Short Training Field ..................................................................... 18 12
3.5.3 Legacy Long Training Field ..................................................................... 19 13
3.5.4 The Legacy Signal Field ........................................................................... 20 14
3.6 The High Throughput Preamble ....................................................................... 22 15
3.6.1 Cyclic shift for the High Throughput preamble........................................ 22 16
3.6.2 The High Throughput Signal Field........................................................... 23 17
3.6.3 CRC calculation........................................................................................ 27 18
3.6.4 The HT STF training symbol.................................................................... 28 19
3.6.5 The HT-LTF long training Field............................................................... 29 20
4 The Data Field........................................................................................................... 33 21
4.1 The service field................................................................................................ 34 22
4.2 Scrambler .......................................................................................................... 34 23
4.3 Coding............................................................................................................... 34 24
4.3.1 Encoder Parsing operation ........................................................................ 34 25
4.3.2 Coding and puncturing.............................................................................. 35 26
4.4 Data Interleaver................................................................................................. 35 27
4.4.1 Stream Parser ............................................................................................ 36 28
4.4.2 Frequency interleaver................................................................................ 36 29
4.5 QAM Mapping.................................................................................................. 38 30
4.5.1 Space-Time-Block-Coding (STBC).......................................................... 38 31
4.6 Pilot Subcarriers................................................................................................ 39 32
