The first LTF (LTF1) consists of two periods of the long training symbol, preceded by a double length (16 cyclic s) prefix. The placement of the first and subsequent LTFs in a greater than or equal to 2MHz short format PPDU is shown in Figure 24-20 (S1G greater than or equal to 2 MHz short format). SIG definition The SIG field carries information required to interpret S1G format PPDUs sent with a short preamble. The structure of the SIG field for the fist symbol (SIG-1) is shown in Figure 24-26 (SIG-1 structure) and for the second symbol (SIG-2) is shown in Figure 24-27 (SIG-2 structure). B0 B1 B2 B3 B5 B6 B7 B15 B16 B17 B19 B23 B18 B4 B22 BW Nsts ID SGI Coding MCS Smoothing STBC Uplink UPLINK Reserved reserved Indication SIG-1 structure B0 B1 B9 B10 B12 B13 B14 B17 B18 B23 B11 Length CRC Tail NDP Doppler Response Indication Indication Aggregation SIG-2 structure The SIG field of S1G format PPDUs sent with a short preamble contains the fields listed in Figure 24-26 (SIG-1 structure) and Figure 24-27 (SIG-2 structure).(#872) Fields in the SIG field of short preamble (continued) Number Symbol Bit Description of bits B0 Reserved 1 Reserved. Set to 1. B1 STBC 1 Set to 1 if all spatial streams have space time block SIG-1 coding and set to 0 if no spatial streams has space time block coding.
The first LTF (LTF1) consists of two periods of the long training symbol, preceded by a double length (16 s) cyclic prefix. The placement of the first and subsequent LTFs in a greater than or equal to 2MHz short format PPDU is shown in Figure 24-20 (S1G greater than or equal to 2 MHz short format). SIG definition The SIG field carries information required to interpret S1G format PPDUs sent with a short preamble. The structure of the SIG field for the fist symbol (SIG-1) is shown in Figure 24-26 (SIG-1 structure) and for the second symbol (SIG-2) is shown in Figure 24-27 (SIG-2 structure). B0 B1 B2 B3 B4 B5 B6 B7 B15 B16 B17 B18 B19 B22 B23 reserved Reserved STBC UPLINK Uplink Indication BW Nsts ID SGI Coding MCS Smoothing SIG-1 structure B0 B1 B9 B10 B11 B12 B13 B14 B17 B18 B23 Aggregation Length Response Indication Doppler NDP Indication CRC Tail SIG-2 structure The SIG field of S1G format PPDUs sent with a short preamble contains the fields listed in Figure 24-26 (SIG-1 structure) and Figure 24-27 (SIG-2 structure).(#872) Fields in the SIG field of short preamble (continued) Symbol Bit Number of bits Description SIG-1 B0 Reserved 1 Reserved. Set to 1. B1 STBC 1 Set to 1 if all spatial streams have space time block coding and set to 0 if no spatial streams has space time block coding.
11-14-0108-00-00ah-lb200-phy-cid-resolutions-for-24-3-8.docx