IEEE 802.11aj (45GHz) PHY PPDU Format

1. PPDU Format for IEEE 802.11aj (45GHz) Date: 2015-05-19 Presenter: Shiwen HE Authors/contributors:

2. Abstract • This presentation describes the Control/SC/OFDM PHY PPDU format for IEEE 802.11aj (45GHz).

3. Control PHY PPDU Format • The control PHY PPDU 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 a series repetitions of the sequence ZCZ of length 256. • The QMG Control PHY Channel Estimation field (CEF) is illustrated as following figure for 540 MHz channel.

4. SC PHY PPDU Format Figure 1 CEF for QMG SC PHY 540 MHz Channel Bandwidth Figure 2 CEF for QMG SC PHY 1080 MHz Channel Bandwidth • 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 a series repetitions of the sequence ZCZ of length 256. • The QMG SC PHY Channel Estimation field (CEF) is illustrated in Figure 1 and Figure 2 for 540 MHz channel bandwidth and 1080 MHz channel bandwidth, respectively. • The optional training fields may be used for Beam-forming of SC

5. SC PHY PPDU Format Figure 3 Spectrum mask in duplicated transmission for 1080 MHz Channel Bandwidth • Note: All fields in a SC PPDU frame are transmitted with SC transmission. For 1080MHz SC transmission, the STF fields, the CEF fields and the SIG fields are transmitted with duplicated style and the corresponding mask of the spectrum is illustrated in Figure 3.

6. SC PHY PPDU Format Figure 4 Spectrum mask in QMG PHY SCTF transmission for 1080 MHz Channel Bandwidth • For 1080MHz SC transmission, the SCTF and the Data fields are transmitted on the 1080MHz channel where SCTF is composed of a series repetitions of the ZCZ sequence of length 512 prepended a 128 CP. • SCTF is only used for SC 1080MHz channel transmission and the mask of the spectrum is illustrated in Figure 4.

7. OFDM PPDU Format Figure 5 CEF for QMG OFDM PHY 540 MHz Channel Bandwidth Figure 6 CEF for QMG OFDM PHY 1080 MHz Channel Bandwidth • An OFDM PHY 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 a series repetitions of the ZCZ sequence of length 256. • The QMG OFDM PHY Channel Estimation field (CEF) is illustrated in Figure 5 and Figure 6 for 540 MHz channel bandwidth and 1080 MHz channel bandwidth, respectively. • The STF, CEF and SIG are transmitted with SC modulation. For 1080MHz channel bandwidth, the STF, CEF and SIG are transmitted with duplicated method and SC modulation • The optional training fields may be used for Beam-forming of OFDM

8. Thanks for your attention.