SIG Field 2 symbols, each modulated using Q-BPSK, same as in 11n green field preamble. 48 data tones occupying tones {-26:26} within each 2MHz subband, and modulated using 11n/11ac MCS0. [12/308r2, Motion1] Data are mapped to multiple space-time streams using the first column of P matrix—the same as in 11n GF preamble. The following CSD table (to be applied Per-Per-Space-Time-Stream) shall be used for the >=2MHz Short Frame format [2012 July meeting minutes, 11-12/833r1: motion1, 2] T_cs(n) for >=2MHz, Short Frame Format and Data portion of Long Frame Format Cyclic shift (for Tx Stream n) (μs) number of time streams 1 2 3 4 1 0 - - - 2 0 -4 - - 3 0 -4 -2 - 4 0 -4 -2 -6 R.3.2.1.1.B: The long preamble structure uses a format shown below: (long preamble) This frame format can be used for MU and SUBF [12/373r0] Omni Portion SIGA field has 48 data tones, occupying tones {-26:26} as in 11n/11ac SIG fields [12/597r0-motion1] STF/LTF1/SIG fields applies single stream in each subcarrier (without the 1st column P matrix mapping as seen in short preamble), similar to the legacy portion of 11n MM preamble and 11ac preamble. SIG field subfield definition is different from short preamble, and the two symbols in SIG field are modulated using QBPSK and BPSK respectively Refer to R.3.2.1.1.C. The following CSD table (to be applied Per-Antenna) shall be used for the >=2MHz Omni portion of the Long Frame format [2012 July meeting minutes, 11-12/833r1:motion1,3]: T_cs(n) for >=2MHz, Omni Portion of Long Frame Format Cyclic (for Tx Antenna n) (μs)
SIG Field 2 symbols, each modulated using Q-BPSK, same as in 11n green field preamble. 48 data tones occupying tones {-26:26} within each 2MHz subband, and modulated using 11n/11ac MCS0. [12/308r2, Motion1] Data are mapped to multiple space-time streams using the first column of P matrix—the same as in 11n GF preamble. The following CSD table (to be applied Per-Per-Space-Time-Stream) shall be used for the >=2MHz Short Frame format [2012 July meeting minutes, 11-12/833r1: motion1, 2] T_cs(n) for >=2MHz, Short Frame Format and Data portion of Long Frame Format number of streams Cyclic shift (for Tx Stream n) (μs) 1 2 3 4 1 0 - - - 2 0 -4 - - 3 0 -4 -2 - 4 0 -4 -2 -6 R.3.2.1.1.B: The long preamble structure uses a format shown below: (long preamble) This frame format can be used for MU and SUBF [12/373r0] Omni Portion SIGA field has 48 data tones, occupying tones {-26:26} as in 11n/11ac SIG fields [12/597r0-motion1] STF/LTF1/SIG fields applies single stream in each subcarrier (without the 1st column P matrix mapping as seen in short preamble), similar to the legacy portion of 11n MM preamble and 11ac preamble. SIG field subfield definition is different from short preamble, and the two symbols in SIG field are modulated using QBPSK and BPSK respectively Refer to R.3.2.1.1.C. The following CSD table (to be applied Per-Antenna) shall be used for the >=2MHz Omni portion of the Long Frame format [2012 July meeting minutes, 11-12/833r1:motion1,3]: T_cs(n) for >=2MHz, Omni Portion of Long Frame Format Cyclic (for Tx Antenna n) (μs) time