September 2019 doc IEEE 802 11 191473 r

September 2019 doc. : IEEE 802. 11 -19/1473 r 0 NGV 20 MHz Spectrum Mask and OFDM Numerology: Followup Date: 2019 -09 -16 Authors: Submission Slide 1 Rui Cao and etc. , Marvell

September 2019 doc. : IEEE 802. 11 -19/1473 r 0 Introduction • 20 MHz spectrum mask and OFDM numerology was discussed in previous meetings [1, 2]. • Straw poll indicates that relaxed mask @f 5 (20 MHz) frequency point is a preferred option. • We propose the xd. B value of relaxation. Submission Slide 2 Rui Cao and etc. , Marvell

September 2019 doc. : IEEE 802. 11 -19/1473 r 0 20 MHz Mask: Recap • Good margin compared to 11 p 20 MHz mask. • Difficult to meet the tight mask @+/-20 MHz frequency. • Submission Need >6 d. B more suppression from PA to temperature sweep and max-hold measurment. Slide 3 Rui Cao and etc. , Marvell

September 2019 doc. : IEEE 802. 11 -19/1473 r 0 20 MHz Spectrum from Skyworks • Skyworks DSRC PA measurement data also shows that there is about 4~4. 5 d. B margin (pwr < 25 d. Bm) compared to 11 p 20 MHz Class C Mask. • Compared with 10 d. B extra suppressed in the potential tight mask, the spectrum of PA output waveform is short of ~6 d. B. Submission Slide 4 Rui Cao and etc. , Marvell

September 2019 doc. : IEEE 802. 11 -19/1473 r 0 Spectrum Masks Relaxation xd. B • Based on our measurement and Skyworks data: x > 6 d. B. Submission Slide 5 Rui Cao and etc. , Marvell

May 2019 doc. : IEEE 802. 11 -19/1473 r 0 20 MHz Spectrum Mask: Class C Permitted power spectrum density, d. Br +/-4. 5 MHz offset (+/-f 1) +/-5 MHz offset (+/-f 2) +/-5. 5 MHz offset (+/-f 3) +/-10 MHz offset (+/-f 4) +/-15 MHz offset (+/-f 5) 0 -26 -32 -40 -50 +/-9 MHz offset (+/-f 1) +/-10 MHz offset (+/-f 2) +/-11 MHz offset (+/-f 3) +/-20 MHz offset (+/-f 4) +/-30 MHz offset (+/-f 5) 0 -26 -32 -40 -50 11 p 10 MHz 11 p 20 MHz Permitted power spectrum density, d. Br +/-9. 5 MHz offset (+/-f 1) +/-10 MHz offset (+/-f 2) +/-10. 5 MHz offset (+/-f 3) +/-15 MHz offset (+/-f 4) +/-20 MHz offset (+/-f 5) +/-25 MHz offset (+/-f 6) 11 bd 20 MHz: Mask 1 0 -26 -32 -40 -50 11 bd 20 MHz: Mask 2 0 -26 -32 -40 -50 + xd. B -50 Submission Slide 6 Rui Cao and etc. , Marvell

September 2019 doc. : IEEE 802. 11 -19/1473 r 0 ACI Penalty Analysis: 10 MHz Channel • • • Submission xd. B = 6, ACI power increase 0. 2 d. B xd. B = 8, ACI power increase 0. 35 d. B xd. B = 10, ACI power increase 0. 48 d. B Slide 7 Rui Cao and etc. , Marvell

September 2019 doc. : IEEE 802. 11 -19/1473 r 0 11 bd 20 MHz Mask 2: Class C • A relaxed 20 MHz spectrum mask: • similar spectrum leakage level to adjacent channel as 10 MHz spectrum mask • relaxed the mask by xd. B at +/-20 MHz (f 5). • Choice of relaxation amount: • Option A: 6 d. B (barely meet the Class C mask) • Option B: 8 d. B (~2 d. B margin, may allow higher max tx power) • Option C: 10 d. B (~4 d. B margin, may allow higher max tx power) Submission Slide 8 Rui Cao and etc. , Marvell

September 2019 doc. : IEEE 802. 11 -19/1473 r 0 Reference [1] Rui Cao and etc. , “PHY Numerology Discussions”, IEEE 802. 11 -19/0686. [2] Rui Cao and etc. , “NGV 20 MHz OFDM Numerology Discussions”, IEEE 802. 11 -19/1072. Submission Slide 9 Rui Cao and etc. , Marvell

September 2019 doc. : IEEE 802. 11 -19/1473 r 0 Straw Poll 1 Do you agree that the 11 bd 20 MHz class C spectrum mask shall be defined as? Permitted power spectrum density, d. Br +/-9. 5 MHz offset (+/-f 1) +/-10 MHz offset (+/-f 2) +/-10. 5 MHz offset (+/-f 3) +/-15 MHz offset (+/-f 4) +/-20 MHz offset (+/-f 5) +/-25 MHz offset (+/-f 6) Option A 0 -26 -32 -40 -44 -50 Option B 0 -26 -32 -40 -42 -50 Option C 0 -26 -32 -40 -50 Option A: Option B: Option C: Abstain: Submission Slide 10 Rui Cao and etc. , Marvell

September 2019 doc. : IEEE 802. 11 -19/1473 r 0 Straw Poll 2 Do you agree to add the following text into Section 3 of SFD? • 11 bd 20 MHz PPDU Data symbol shall use 11 ac 40 MHz OFDM downclock by 2? Y: N: Abstain: Submission Slide 11 Rui Cao and etc. , Marvell