1. PPDU Format for IEEE 802.11aj (45GHz)
Date:
Presenter: Shiwen HE
Authors/contributors:

2. Abstract
This presentation describes the PPDU format for IEEE aj (45GHz) SC/OFDM PHY.
This presentation describes the PPDU format for IEEE aj (45GHz) Control PHY

3. SC PPDU Format
A SC PPDU frame is composed of the QMG SC PHY STF, the QMG SC PHY CEF, the QMG SC PHY SIG field, the optional QMG SC PHY SCTF, the SC data block and the optional training fields
The QMG SC PHY Short Training field (STF) is composed of 10 repetitions of the sequence –Zb256(n) of length 256.
The QMG SC PHY Channel Estimation field (CEF) is illustrated in Figure 2 and Figure 3 for 540 MHz channel bandwidth and 1080 MHz channel bandwidth, respectively.
The optional training fields may be used for Beam-forming of SC
Figure 1 Format of SC PPDU
Figure 2 CEF for QMG SC PHY 540 MHz Channel Bandwidth
Figure 3 CEF for QMG SC PHY 1080 MHz Channel Bandwidth

4. SC PPDU Format
A SC PPDU frame is composed of the QMG SC PHY STF, the QMG SC PHY CEF, the QMG SC PHY SIG field, the optional QMG SC PHY SCTF, the SC data block and the optional training fields
Note: All fields are transmitted with SC transmission. For 1080MHz SC transmission, the STF fields, the CEF fields and the SIG fields are transmitted with duplicated style. In this situation the mask of the spectrum is illustrated in figure 4.
Figure 1 Format of SC PPDU
Figure 4 Spectrum mask in duplicated transmission for 1080 MHz Channel Bandwidth

5. SC PPDU Format
A SC PPDU frame is composed of the QMG SC PHY STF, the QMG SC PHY CEF, the QMG SC PHY SIG field, the optional QMG SC PHY SCTF, the SC data block and the optional training fields
The QMG SC PHY SCTF is composed of 2 repetitions of the sequence –ZCZ512(n) of length 512. The QMG SC PHY SCTF is only used for 1080MHz SC transmission. In this situation the mask of the spectrum is illustrated in figure 5.
Figure 1 Format of SC PPDU
Figure 5 Spectrum mask in QMG PHY SCTF transmission for 1080 MHz Channel Bandwidth

6. OFDM PPDU Format
A MIMO OFDM PPDU frame is composed of the OFDM PHY STF fields, the OFDM PHY CEF field, the QMG OFDM PHY SIG field, the OFDM Long Training Field (MCTF), OFDM symbols and the optional training fields
The QMG OFDM PHY Short Training field (STF) is composed of 10 repetitions of the sequence –Zc256(n) of length 256.
The QMG OFDM PHY Channel Estimation field (CEF) is illustrated in Figure 7 and Figure 8 for 540 MHz channel bandwidth and 1080 MHz channel bandwidth, respectively.
The optional training fields may be used for Beam-forming of OFDM
Figure 6 Format of OFDM PPDU
Figure 7 CEF for QMG OFDM PHY 540 MHz Channel Bandwidth
Figure 8 CEF for QMG OFDM PHY 1080 MHz Channel Bandwidth

7. Control PHY PPDU Format
The control PHY frame is composed of the QMG control PHY STF, QMG control PHY CEF, QMG control PHY SIG, QMG control PHY Data field, and possibly AGC and TRN-R/T subfields.
The QMG Control PHY Short Training field (STF) is composed of 10 repetitions of the sequence –Za256(n) of length 256.
The QMG Control PHY Channel Estimation field (CEF) is illustrated in Figure 10 and Figure 11 for 540 MHz channel bandwidth and 1080 MHz channel bandwidth, respectively.
The optional training fields may be used for Beam-forming
Figure 9 Format of Control PHY PPDU
Figure 10 CEF for QMG Control PHY 540 MHz Channel Bandwidth
Figure 11 CEF for QMG Control PHY 1080 MHz Channel Bandwidth

8. Thanks for your attention.