1. doc.: IEEE 802.11-15/1334r1 Submission HE-LTF Sequence Design Date: 2015-11-09Authors: NameAffiliationAddressPhoneEmail Le Liu Huawei F1-17, Huawei Base, Bantian, Shenzhen +86-18028794213 liule@huawei.com Xin Xue xuexin@huawei.com Ningjuan Wang wangningjuan@huawei.com Wei Lin lin.linwei@huawei.com Shimi Shilo 4 Ha'harash st., Hod Hasharon, Israel shimi.shilo@huawei Genadiy Tsodik genadiy.tsodic@huawei.com Doron Ezri Doron.Ezri@huawei.com Jiayin Zhang 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai zhangjiayin@huawei.com Jun Luo jun.l@huawei.com Yingpei Lin linyingpei@huawei.com Jiyong Pang pangjiyong@huawei.com Peter Loc peterloc@iwirelesstech.com Rob Sun 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada Rob.Sun@huawei.com Junghoon Suh Junghoon.Suh@huawei.com Zhigang Rong 10180 Telesis Court, Suite 365, San Diego, CA 92121 NA zhigang.rong@huawei.com David X. Yang F1-17, Huawei Base, Bantian, Shenzhen david.yangxun@huawei.com Yi Luo Roy.luoyi@huawei.com Le Liu, Huawei, et. al. Slide 1 November, 2015

2. doc.: IEEE 802.11-15/1334r1 Submission Slide 2 Authors (continued) NameAffiliationAddressPhoneEmail Lin Yang Qualcomm 5775 Morehouse Dr. San Diego, CA, USA linyang@qti.qualcomm.com Alice Chen 5775 Morehouse Dr. San Diego, CA, USA alicel@qti.qualcomm.com Albert Van Zelst Straatweg 66-S Breukelen, 3621 BR Netherlands allert@qti.qualcomm.com Alfred Asterjadhi 5775 Morehouse Dr. San Diego, CA, USA aasterja@qti.qualcomm.com Arjun Bharadwaj 5775 Morehouse Dr. San Diego, CA, USA arjunb@qti.qualcomm.com Bin Tian 5775 Morehouse Dr. San Diego, CA, USA btian@qti.qualcomm.com Carlos Aldana 1700 Technology Drive San Jose, CA 95110, USA caldana@qca.qualcomm.com George Cherian 5775 Morehouse Dr. San Diego, CA, USA gcherian@qti.qualcomm.com Gwendolyn Barriac 5775 Morehouse Dr. San Diego, CA, USA gbarriac@qti.qualcomm.com Hemanth Sampath 5775 Morehouse Dr. San Diego, CA, USA hsampath@qti.qualcomm.com Menzo Wentink Straatweg 66-S Breukelen, 3621 BR Netherlands mwentink@qti.qualcomm.com Naveen Kakani 2100 Lakeside Boulevard Suite 475, Richardson TX 75082, USA nkakani@qti.qualcomm.com Raja Banerjea 1060 Rincon Circle San Jose CA 95131, USA rajab@qit.qualcomm.com Richard Van Nee Straatweg 66-S Breukelen, 3621 BR Netherlands rvannee@qti.qualcomm.com Le Liu, Huawei, et. al. November, 2015

3. doc.: IEEE 802.11-15/1334r1 Submission Slide 3 Authors (continued) NameAffiliationAddressPhoneEmail Rolf De Vegt Qualcomm 1700 Technology Drive San Jose, CA 95110, USA rolfv@qca.qualcomm.com Sameer Vermani 5775 Morehouse Dr. San Diego, CA, USA svverman@qti.qualcomm.com Simone Merlin 5775 Morehouse Dr. San Diego, CA, USA smerlin@qti.qualcomm.com Tao Tian 5775 Morehouse Dr. San Diego, CA, USA ttian@qti.qualcomm.com Tevfik Yucek 1700 Technology Drive San Jose, CA 95110, USA tyucek@qca.qualcomm.com VK Jones 1700 Technology Drive San Jose, CA 95110, USA vkjones@qca.qualcomm.com Youhan Kim 1700 Technology Drive San Jose, CA 95110, USA youhank@qca.qualcomm.com Le Liu, Huawei, et. al. November, 2015

4. doc.: IEEE 802.11-15/1334r1 Submission Authors (continued) NameAffiliationAddressPhoneEmail Leo Montreuil leo.montreuil@broadcom.com Ron Porat Broadcom rporat@broadcom.com Matthew Fischer mfischer@broadcom.com Sriram Venkateswaran Andrew Blanksby Matthias Korb Vinko Erceg Le Liu, Huawei, et. al. Slide 4 November, 2015 Robert Stacey Intel 2111 NE 25th Ave, Hillsboro OR 97124, USA +1-503-724-893 robert.stacey@intel.com Shahrnaz Azizi shahrnaz.azizi@intel.com Po-Kai Huang po-kai.huang@intel.com Qinghua Li quinghua.li@intel.com Xiaogang Chen xiaogang.c.chen@intel.com Chitto Ghosh chittabrata.ghosh@intel.com Laurent Cariou laurent.cariou@intel.com Yaron Alpert yaron.alpert@intel.com Assaf Gurevitz assaf.gurevitz@intel.com Ilan Sutskover ilan.sutskover@intel.com

5. doc.: IEEE 802.11-15/1334r1 Submission Authors (continued) NameAffiliationAddressPhoneEmail Hongyuan Zhang Marvell 5488 Marvell Lane, Santa Clara, CA, 95054 408-222-2500 hongyuan@marvell.com Yakun Sun yakunsun@marvell.com Lei Wang Leileiw@marvell.com Liwen Chu liwenchu@marvell.com Jinjing Jiang jinjing@marvell.com Yan Zhang yzhang@marvell.com Rui Cao ruicao@marvell.com Sudhir Srinivasa sudhirs@marvell.com Bo Yu boyu@marvell.com Saga Tamhane sagar@marvell.com Mao Yu my@marvel..com Xiayu Zheng xzheng@marvell.com Christian Berger crberger@marvell.com Niranjan Grandhe ngrandhe@marvell.com Hui-Ling Lou hlou@marvell.com Le Liu, Huawei, et. al. Slide 5 November, 2015

6. doc.: IEEE 802.11-15/1334r1 Submission Slide 6 Authors (continued) Joonsuk Kim Apple joonsuk@apple.com Aon Mujtaba mujtaba@apple.com Guoqing Li guoqing_li@apple.com Eric Wong ericwong@apple.com Chris Hartmanchartman@apple.com NameAffiliationAddressPhoneEmail James Yee Mediatek No. 1 Dusing 1 st Road, Hsinchu, Taiwan +886-3-567-0766 james.yee@mediatek.com Alan Jauh alan.jauh@mediatek.com Chingwa Hu chinghwa.yu@mediatek.co m Frank Hsu frank.hsu@mediatek.com Thomas Pare Mediatek USA 2860 Junction Ave, San Jose, CA 95134, USA +1-408-526-1899 thomas.pare@mediatek.com ChaoChun Wang chaochun.wang@mediatek.c om James Wang james.wang@mediatek.com Jianhan Liu Jianhan.Liu@mediatek.com Tianyu Wu tianyu.wu@mediatek.com Zhou Lan Zhou.lan@mediaTek.com Russell Huang russell.huang@mediatek.co m Le Liu, Huawei, et. al. November, 2015

7. doc.: IEEE 802.11-15/1334r1 Submission Slide 7 Authors (continued) NameAffiliationAddressPhoneEmail Jinmin Kim LG Electronics 19, Yangjae-daero 11gil, Seocho-gu, Seoul 137- 130, Korea Jinmin1230.kim@lge.com Kiseon Ryu kiseon.ryu@lge.com Jinyoung Chun jiny.chun@lge.com Jinsoo Choi js.choi@lge.com Jeongki Kim jeongki.kim@lge.com Dongguk Lim dongguk.lim@lge.com Suhwook Kim suhwook.kim@lge.com Eunsung Park esung.park@lge.com JayH Park Hyunh.park@lge.com HanGyu Cho hg.cho@lge.com Thomas DerhamOrange thomas.derham@orange.com Bo Sun ZTE #9 Wuxingduan, Xifeng Rd., Xi'an, China sun.bo1@zte.com.cn Kaiying Lv lv.kaiying@zte.com.cn Yonggang Fang yfang@ztetx.com Ke Yao yao.ke5@zte.com.cn Weimin Xing xing.weimin@zte.com.cn Brian Hart Cisco Systems 170 W Tasman Dr, San Jose, CA 95134 brianh@cisco.com Pooya Monajemi pmonajem@cisco.com Le Liu, Huawei, et. al. November, 2015

8. doc.: IEEE 802.11-15/1334r1 Submission Slide 8 Authors (continued) NameAffiliationAddressPhoneEmail Fei Tong Samsung Innovation Park, Cambridge CB4 0DS (U.K.) +44 1223 434633 f.tong@samsung.com Hyunjeong Kang Maetan 3-dong; Yongtong-Gu Suwon; South Korea +82-31-279-9028 hyunjeong.kang@samsung.com Kaushik Josiam 1301, E. Lookout Dr, Richardson TX 75070 (972) 761 7437 k.josiam@samsung.com Mark Rison Innovation Park, Cambridge CB4 0DS (U.K.) +44 1223 434600 m.rison@samsung.com Rakesh Taori 1301, E. Lookout Dr, Richardson TX 75070 (972) 761 7470 rakesh.taori@samsung.com Sanghyun Chang Maetan 3-dong; Yongtong-Gu Suwon; South Korea +82-10-8864-1751 s29.chang@samsung.com Yasushi Takatori NTT 1-1 Hikari-no-oka, Yokosuka, Kanagawa 239-0847 Japan takatori.yasushi@lab.ntt.co.jp Yasuhiko Inoue inoue.yasuhiko@lab.ntt.co.jp Shoko Shinohara Shinohara.shoko@lab.ntt.co.jp Yusuke Asai asai.yusuke@lab.ntt.co.jp Koichi Ishihara ishihara.koichi@lab.ntt.co.jp Junichi Iwatani Iwatani.junichi@lab.ntt.co.jp Akira Yamada NTT DOCOMO 3-6, Hikarinooka, Yokosuka- shi, Kanagawa, 239-8536, Japan yamadaakira@nttdocomo.com Fujio Watanabe 3240 Hillview Ave, Palo Alto, CA 94304 watanabe@docomoinnovations. com Haralabos Papadopoulos hpapadopoulos@docomoinnova tions.com Le Liu, Huawei, et. al. November, 2015

9. doc.: IEEE 802.11-15/1334r1 Submission Slide 9 Authors (continued) NameAffiliationAddressPhoneEmail Masahito Mori Sony Corp. Masahito.Mori@jp.sony.com Yusuke TanakaYusukeC.Tanaka@jp.sony.com Yuichi MoriokaYuichi.Morioka@jp.sony.com Kazuyuki SakodaKazuyuki.Sakoda@am.sony.com William CarneyWilliam.Carney@am.sony.com Le Liu, Huawei, et. al. November, 2015

10. doc.: IEEE 802.11-15/1334r1 Submission Introduction HE-LTF is used for channel estimation of 11ax data portion with 4x symbol length based on latest 20/40/80MHz OFDMA tone plan [1][2] To manage the PA distortion and ensure the channel estimation quality, it is important to reduce the PAPR of HE LTF, at least not larger than that of the HE Data field. For 20MHz, the use of 242-tone VHT-LTF with gamma as 20MHz HE-LTF results in high PAPR. For 40/80MHz, VHT-LTF cannot be reused.  In this presentation, we propose the 20/40/80MHz HE-LTF sequences. 5.976.135.346.52 7.29 7.355.856.967.03 6.416.446.216.61 6.345.69 6.53 Gamma=[+1 64,-1 64, -1 64,-1 64 ] Worst PAPR of VHT-LTF -122,122 w/ gamma@20MHz Le Liu, Huawei, et. al. Slide 10

11. doc.: IEEE 802.11-15/1334r1 Submission Consideration on HE-LTF Sequence Optimize PAPR of HE-LTF considering the following cases –Single RU of small size and large size for UL OFDMA due to relatively poor amplifier at STA side –Numerous combinations of RU allocation in DL OFDMA AP may not fill all the OFDMA allocations so that we need examine some typical scenarios. –Impact from single stream pilot [3] The tones except single-stream pilot tones are multiplied with P-matrix Limit the tone mapping of HE-LTF as well as HE-STF same as that of the payload. –It is much simpler and cleaner to only occupy tones that are actually used in the payload and scale power for payload and HE-LTF/STF in the same way. –If HE-LTF doesn’t follow the exact allocation it complicates power normalization and adds interference (when large allocations are unused). Le Liu, Huawei, et. al. Slide 11

12. doc.: IEEE 802.11-15/1334r1 Submission HE-LTF of 80MHz Le Liu, Huawei, et. al. Slide 12

13. doc.: IEEE 802.11-15/1334r1 Submission 4x HE-LTF of 80MHz (1/2) 4x HE-LTF 996 (-500,500) = {+1, +1, -1, +1, -1, +1, -1, -1, -1, +1, -1, -1, -1, +1, +1, -1, +1, +1, +1, +1, +1, -1, -1, +1, +1, +1, +1, -1, +1, -1,... +1, -1, -1, +1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, -1, +1, +1, +1, -1, -1, -1, -1, -1, -1, +1, +1, +1, +1, +1,... +1, -1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1, +1, +1, +1, +1, -1, -1, +1, +1,... +1, -1, +1, +1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, -1, +1, -1, -1, +1, +1, +1, +1, -1, -1, +1, +1, +1, +1, +1, -1,... +1, +1, -1, -1, -1, +1, -1, -1, -1, +1, -1, +1, -1, +1, +1, -1, +1, -1, +1, -1, +1, +1, +1, -1, +1, +1, +1, -1, -1, +1,... -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1, +1, -1, +1, -1, +1, +1, -1, -1, +1, -1, -1, -1, +1, +1, -1, +1, +1, +1, +1,... -1, -1, -1, +1, +1, +1, +1, -1, +1, +1, +1, +1, +1, +1, +1, -1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, +1, -1, -1,... +1, +1, -1, +1, -1, +1, +1, +1, +1, +1, -1, -1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, -1, +1,... -1, -1, +1, -1, +1, -1, +1, -1, +1, +1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1, +1,... -1, +1, -1, +1, +1, -1, -1, +1, -1, -1, -1, +1, +1, -1, +1, +1, +1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, -1, -1, -1,... -1, -1, -1, +1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, -1, +1, +1, -1, -1, +1, -1, +1, -1, -1, -1, -1, -1, +1, +1,... -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, -1, -1, +1, -1, -1, +1, -1, +1, +1, +1, +1, +1, +1, -1, -1, +1, +1, +1, +1,... +1, -1, +1, +1, -1, -1, -1, +1, -1, -1, -1, +1, -1, +1, -1, +1, +1, -1, +1, -1, +1, -1, +1, +1, +1, -1, +1, +1, +1, -1,... -1, +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1, +1, -1, +1, -1, +1, +1, -1, -1, +1, -1, -1, -1, +1, +1, -1, +1, +1,... +1, +1, -1, -1, -1, +1, +1, +1, +1, -1, -1, +1, +1, +1, +1, +1, +1, -1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, +1,... -1, -1, +1, +1, -1, +1, -1, +1, +1, +1, +1, +1, -1, -1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1,... -1, +1, -1, -1, -1, +1, -1, +1, -1, -1, -1, -1, +1, +1, +1, -1, -1, +1, 0, 0, 0, 0, 0, +1, -1, -1, -1, -1, -1, -1,... Le Liu, Huawei, et. al. Slide 13

14. doc.: IEEE 802.11-15/1334r1 Submission 4x HE-LTF of 80MHz (2/2) +1, -1, +1, +1, -1, -1, +1, +1, -1, +1, -1, +1, +1, -1, -1, +1, -1, +1, -1, -1, -1, +1, +1, -1, +1, +1, +1, -1, +1, +1,... +1, +1, +1, +1, +1, -1, +1, -1, -1, +1, -1, -1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, -1, -1,... +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, +1, +1, -1, +1, -1, +1, -1, -1, -1,... -1, -1, +1, +1, +1, -1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, +1, -1, -1, +1, -1, +1, -1, -1, -1, -1, -1, -1, -1,... +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, -1, -1, +1, -1, -1, +1, -1, +1, +1, +1, -1, +1, -1, -1, +1, +1, -1,... +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, +1, -1, -1, -1, -1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, -1, +1, -1, -1,... -1, +1, +1, -1, +1, +1, +1, -1, -1, +1, +1, +1, +1, +1, -1, +1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1, -1, +1, -1, -1,... +1, +1, +1, -1, +1, +1, +1, -1, +1, -1, +1, -1, -1, -1, -1, -1, +1, +1, +1, -1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1,... +1, +1, -1, -1, +1, -1, +1, -1, +1, +1, +1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, +1,... -1, -1, -1, -1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1, -1, +1, +1, +1, -1, -1, +1, +1, +1,... +1, +1, -1, +1, +1, +1, +1, +1, -1, -1, +1, +1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, -1, -1, +1, -1, +1, -1, +1,... +1, +1, +1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1, -1, -1, -1, -1,... -1, -1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, -1, -1, +1, -1, -1, +1, -1, +1, -1, +1, -1, +1, -1, -1, +1,... +1, -1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, +1, -1, -1, -1, -1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, -1, +1,... -1, -1, -1, +1, +1, -1, +1, +1, +1, -1, -1, +1, +1, +1, +1, +1, -1, +1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1, -1, +1,... -1, -1, +1, +1, +1, -1, +1, +1, +1, -1, +1, -1, +1, -1, -1, -1, -1, -1, +1, +1, +1, -1, -1, -1, -1, +1, -1, -1, +1, +1,... +1, -1, +1, +1, -1, -1, +1, -1, +1, -1, +1} Le Liu, Huawei, et. al. Slide 14

15. doc.: IEEE 802.11-15/1334r1 Submission 2x HE-LTF of 80MHz 2x HE-LTF 996 (-500:2:500) = { +1, +1, -1, +1, +1, +1, -1, +1, +1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, -1, -1, -1, -1, +1, +1, +1,... +1, -1, +1, +1, +1, -1, +1, -1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, +1, -1, -1, +1, -1, +1, +1, -1, +1, +1, -1, +1,... -1, -1, -1, +1, -1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, -1, -1, -1, -1, +1, -1, +1, +1, +1, -1, +1, +1, +1,... +1, -1, -1, -1, +1, +1, +1, -1, -1, +1, +1, +1, -1, +1, +1, -1, +1, -1, -1, -1, -1, +1, -1, -1, -1, +1, -1, +1, +1, -1,... +1, +1, -1, -1, -1, +1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, +1, -1, -1, +1, +1, +1, -1, +1, +1, -1, +1, -1, -1, +1,... -1, +1, +1, +1, -1, +1, +1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, -1, -1, -1, -1, +1, +1, +1, -1, -1,... -1, -1, +1, -1, -1, -1, +1, -1, +1, +1, +1, -1, -1, +1, +1, +1, -1, +1, +1, -1, +1, -1, -1, -1, -1, +1, -1, -1, -1, +1,... -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, -1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, -1, -1, -1, +1, -1, -1, -1, -1, +1,... +1, +1, +1, -1, -1, -1, +1, +1, +1, 0, 0, 0, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, +1, +1,... -1, +1, -1, -1, -1, -1, +1, +1, +1, -1, +1, +1, -1, -1, +1, -1, -1, +1, -1, -1, +1, -1, +1, +1, +1, -1, +1, +1, +1, +1,... -1, +1, -1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, +1, -1, +1, +1, +1, -1, +1, +1, +1, +1, -1, -1, -1, +1, +1, +1, +1,... -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, -1, -1, -1, -1, +1, -1, -1, -1, +1, -1, +1, +1, -1, +1, -1, -1, +1, -1,... -1, -1, +1, +1, -1, -1, -1, +1, -1, -1, +1, -1, +1, +1, +1, -1, +1, +1, +1, -1, +1, -1, +1, +1, -1, +1, -1, -1, -1, +1,... -1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, +1, -1, -1, +1, +1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, +1, +1, -1, +1,... -1, -1, -1, -1, +1, +1, +1, -1, +1, +1, -1, -1, +1, -1, -1, -1, -1, +1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, -1, +1,... -1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, +1, -1, -1, +1, -1, +1, +1, +1, -1, +1, +1, +1, +1, -1, -1, -1, -1, +1, +1,... +1, -1, +1, +1, -1, -1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, +1, +1, -1, +1, +1} Le Liu, Huawei, et. al. Slide 15

16. doc.: IEEE 802.11-15/1334r1 Submission UL PAPR of 80MHz 4x HE-LTF Worst PAPR (dB) of proposed HE-LTF @80MHz 3.78 4.25 3.78 4.974.444.974.444.974.444.974.444.974.444.974.444.974.444.974.44 5.385.355.315.535.485.505.485.50 5.515.605.53 5.966.00 6.29 -1.6~-3.6 -1.2~-2.2 -1.03 The proposed HE-LTF of 80MHz has uniform worst case PAPR distribution and lower PAPR than that of VHT-LTF for 26/52/106/242-RU sizes (all<6.4dB). PAPR reduction over VHT-LTF Note: Worst PAPR is the max PAPR for the HE-LTF tones except pilot tones multiplied by elements of 2x2, 4x4, 6x6, 8x8 P matrix Le Liu, Huawei, et. al. Slide 16

17. doc.: IEEE 802.11-15/1334r1 Submission UL PAPR of 80MHz 2x HE-LTF The proposed HE-LTF of 80MHz has uniform worst case PAPR distribution and lower PAPR than that of VHT-LTF for 26/52/106/242-RU sizes (all<6.4dB). 4.46 4.37 4.46 4.69 5.42 5.415.425.41 5.425.415.42 5.58 6.296.40 6.08 Worst PAPR (dB) of proposed HE-LTF @80MHz -0.9~-2.9 -1.5~-1.9 -0.76 -0.95 PAPR reduction over VHT-LTF Note: Worst PAPR is the max PAPR for the HE-LTF tones except pilot tones multiplied by elements of 2x2, 4x4, 6x6, 8x8 P matrix Le Liu, Huawei, et. al. Slide 17

18. doc.: IEEE 802.11-15/1334r1 Submission DL PAPR of 80MHz 4x/2x HE-LTF Combinations of RU allocation in DL OFDMA Test cases of 80MHz Worst PAPR in dB 4x HE-LTF2x HE-LTF RU-9966.296.08 RU484 + RU26 + RU4846.676.99 RU484 + RU26 + RU4846.646.55 RU242 + RU242 + RU26 + RU242 + RU2426.646.55 RU-242 + RU-242 + RU-26 + RU-242 + RU-2427.686.87 RU-242 + RU-242 + RU-26 + RU-242 + RU-2426.646.55 RU106 + RU26 +RU106 +RU242+RU26+ RU242+RU2427.417.43 Le Liu, Huawei, et. al. Slide 18

19. doc.: IEEE 802.11-15/1334r1 Submission HE-LTF of 40MHz Le Liu, Huawei, et. al. Slide 19

20. doc.: IEEE 802.11-15/1334r1 Submission 4x HE-LTF of 40MHz 4x HE-LTF 484 (-244,244) = { +1, -1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, -1, -1, -1,... -1, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, -1, -1, +1, -1, +1, +1, +1, -1, -1, +1, +1, +1, -1, -1, +1, +1, +1, +1, -1,... +1, +1, -1, -1, +1, -1, +1, -1, +1, -1, -1, +1, -1, +1, +1, +1, -1, -1, +1, +1, +1, -1, -1, -1, -1, +1, -1, -1, +1, +1,... -1, +1, -1, -1, -1, -1, -1, +1, -1, +1, +1, +1, -1, -1, +1, +1, +1, +1, +1, +1, +1, +1, -1, +1, +1, -1, -1, +1, -1, +1,... +1, +1, +1, +1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, -1, -1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1, -1, +1,... +1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, -1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, -1, -1, +1, -1, +1,... +1, +1, -1, -1, +1, +1, +1, -1, -1, -1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1, -1, +1, +1, -1, +1, -1, -1, -1,... +1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, +1, -1, -1, +1, -1, +1, +1, +1, +1, +1, -1, +1, -1, -1, -1, +1, +1, -1, -1,... -1, +1, 0, 0, 0, 0, 0, -1, +1, +1, +1, +1, -1, +1, +1, -1, -1, +1, -1, +1, -1, +1, -1, -1, +1, -1, +1, +1, +1, -1,... -1, +1, +1, +1, +1, +1, +1, +1, -1, +1, +1, -1, -1, +1, -1, +1, +1, +1, +1, +1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1,... +1, +1, -1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, +1, +1,... +1, +1, -1, +1, +1, -1, -1, +1, -1, +1, +1, +1, +1, +1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, +1, -1, -1, -1, -1, +1,... -1, -1, +1, +1, -1, +1, -1, +1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, +1, -1, -1, -1, -1, +1, -1, -1, +1,... +1, -1, +1, -1, +1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, -1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, -1,... -1, -1, -1, -1, +1, -1, +1, +1, +1, -1, -1, +1, +1, +1, -1, +1, -1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1, -1,... +1, +1, -1, +1, -1, -1, -1, +1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, +1, -1, -1, +1, -1, +1, +1, +1, +1, +1, -1, +1,... -1, -1, -1, +1, +1, -1, -1, -1, -1 } Le Liu, Huawei, et. al. Slide 20

21. doc.: IEEE 802.11-15/1334r1 Submission 2x HE-LTF of 40MHz 2x HE-LTF 484 (-244:2:244) = { +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, +1, -1, +1, -1, -1, -1, -1, -1, -1, +1, +1, +1, +1, -1, +1, -1, +1, +1, -1, -1,... -1, -1, -1, +1, +1, -1, -1, +1, -1, +1, -1, +1, +1, +1, +1, +1, -1, -1, -1, -1, +1, -1, +1, -1, +1, +1, +1, +1, +1, -1,... +1, -1, -1, +1, -1, +1, -1, -1, +1, +1, +1, +1, +1, -1, -1, +1, +1, -1, +1, -1, +1, +1, +1, +1, +1, +1, -1, -1, -1, -1,... +1, -1, +1, -1, -1, -1, -1, -1, -1, -1, +1, +1, -1, -1, +1, -1, +1, -1, +1, +1, +1, +1, +1, -1, -1, -1, -1, +1, -1, +1,... -1, 0, 0, 0, -1, -1, -1, -1, -1, +1, +1, -1, -1, +1, -1, +1, -1, -1, -1, -1, -1, -1, +1, -1, +1, +1, -1, +1, -1, +1,... +1, +1, +1, +1, +1, +1, -1, -1, +1, +1, -1, +1, -1, +1, -1, -1, -1, -1, -1, +1, -1, +1, +1, -1, +1, -1, +1, +1, +1, +1,... +1, +1, +1, -1, -1, +1, +1, -1, +1, -1, +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, +1, -1, +1, -1, -1, -1, -1, -1, -1, +1,... -1, +1, +1, -1, +1, -1, +1, +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, +1, -1, +1, -1, +1, +1, +1, +1, +1, -1, +1, -1, -1,... +1, -1, +1, -1, +1 } Le Liu, Huawei, et. al. Slide 21

22. doc.: IEEE 802.11-15/1334r1 Submission UL PAPR of 40MHz 4x HE-LTF 5.864.895.864.89 5.97 5.864.895.864.894.485.974.485.97 5.86 4.485.974.485.97 5.385.515.385.515.766.005.766.00 5.915.845.235.61 5.775.87 5.47 HE40 12 Edge 11 Edge 5 DC 5DC5DC 5 DC 5DC5DC 242 26 102+4 26 52 26 1 1 52 26 1 2 12 1 1 102+4 26 52 26 1 1 52 26 1 2 12 1 1 242 26 102+4 26 52 26 1 1 52 26 1 2 12 1 1 102+4 26 52 26 1 1 52 26 1 2 1 2 1 1 -238 -212 -170 -144 -104 -78 -36 -10pilots tone index -224 -198 -184 -158 -130 -116 -90 -64 -50 -24 10 36 78 104 144 170 212 238 24 50 64 90 116 130 158 184 198 224 Worst PAPR (dB) of proposed HE-LTF @40MHz 484-tone + 5DC 12 Edge11 Edge +0.5~-2.9 -0.4~-1.1 -1.1 -0.7~-0.8 PAPR reduction over VHT-LTF The proposed HE-LTF of 40MHz has uniform worst case PAPR distribution and lower PAPR than that of VHT-LTF for 26/52/106/242-RU sizes (all<6dB) Note: Worst PAPR is the max PAPR for the HE-LTF tones except pilot tones multiplied by elements of 2x2, 4x4, 6x6, 8x8 P matrix Le Liu, Huawei, et. al. Slide 22

23. doc.: IEEE 802.11-15/1334r1 Submission UL PAPR of 40MHz 2x HE-LTF 4.604.984.604.98 4.604.984.604.984.604.984.604.98 4.60 4.984.604.98 5.295.045.295.045.455.025.455.02 5.285.495.295.99 5.895.66 5.84 HE40 12 Edge 11 Edge 5 DC 5DC5DC 5 DC 5DC5DC 242 26 102+4 26 52 26 1 1 52 26 1 2 12 1 1 102+4 26 52 26 1 1 52 26 1 2 12 1 1 242 26 102+4 26 52 26 1 1 52 26 1 2 12 1 1 102+4 26 52 26 1 1 52 26 1 2 1 2 1 1 -238 -212 -170 -144 -104 -78 -36 -10pilots tone index -224 -198 -184 -158 -130 -116 -90 -64 -50 -24 10 36 78 104 144 170 212 238 24 50 64 90 116 130 158 184 198 224 Worst PAPR (dB) of proposed HE-LTF @40MHz 484-tone + 5DC 12 Edge11 Edge The proposed HE-LTF of 40MHz has uniform worst case PAPR distribution and lower PAPR than that of VHT-LTF for 26/52/106/242-RU sizes (all<6dB) -0.7~-2.8 -0.8~-1.6 -1.06 -0.90 PAPR reduction over VHT-LTF Note: Worst PAPR is the max PAPR for the HE-LTF tones except pilot tones multiplied by elements of 2x2, 4x4, 6x6, 8x8 P matrix Le Liu, Huawei, et. al. Slide 23

24. doc.: IEEE 802.11-15/1334r1 Submission DL PAPR of 40MHz 4x/2x HE-LTF Combinations of RU allocation in DL OFDMA Test cases of 40MHz Worst PAPR in dB 4x HE-LTF2x HE-LTF RU-4845.475.84 row of 52-RU all occupied but no mid-center 26-RUs6.23746.7597 RU-106 + RU-26 +RU-106 + RU-106 + RU-26 + RU-1066.38896.3896 RU-106 + RU-26 +RU-106 + RU-106 + RU-26 + RU-1066.51356.7331 RU-106 + RU-26 +RU-106 + RU-106 + RU-26 + RU-1067.14837.3391 RU-106 + RU-26 +RU-106 + RU-106 + RU-26 + RU-1066.62316.6331 Le Liu, Huawei, et. al. Slide 24

25. doc.: IEEE 802.11-15/1334r1 Submission HE-LTF of 20MHz Le Liu, Huawei, et. al. Slide 25

26. doc.: IEEE 802.11-15/1334r1 Submission 4x HE-LTF 242 (-122:122) = [ -1, -1, +1, -1, +1, -1, +1, +1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1, +1, +1, -1,... +1, -1, +1, +1, +1, +1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, +1, -1, -1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, +1,... -1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, -1, +1, -1, +1, -1, -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1,... -1, +1, -1, -1, +1, +1, +1, -1, +1, +1, +1, -1, +1, -1, +1, -1, -1, -1, -1, -1, +1, +1, +1, -1, -1, -1, +1, -1, +1, +1,... +1, 0, 0, 0, -1, +1, -1, +1, -1, +1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, +1, -1, +1, -1, +1, +1, +1, -1, +1, +1,... +1, -1, -1, +1, -1, -1, -1, -1, -1, +1, +1, -1, -1, -1, -1, -1, -1, +1, -1, +1, -1, -1, -1, -1, +1, -1, +1, +1, -1, -1,... +1, -1, -1, -1, -1, +1, +1, -1, +1, +1, +1, +1, +1, +1, +1, -1, +1, +1, -1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, -1,... -1, -1, -1, +1, -1, +1, -1, -1, +1, +1, +1, +1, -1, -1, +1, +1, +1, +1, +1, -1, +1, +1, -1, -1, -1, +1, -1, -1, -1, +1,... -1, +1, -1, +1, +1 ]; 2x HE-LTF 242 (-122:2:122) = [ -1, -1, -1, +1, +1, -1, +1, -1, -1, -1, -1, +1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, +1, +1, -1, +1, -1, +1, -1, -1,... +1, +1, -1, +1, -1, -1, -1, -1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, -1, -1, +1, -1, -1, -1, +1, +1, +1, -1, -1,... +1, 0, +1, -1, +1, +1, -1, +1, +1, -1, +1, +1, -1, -1, +1, -1, +1, +1, +1, +1, -1, +1, -1, +1, +1, -1, -1, +1, -1, -1,... -1, -1, -1, +1, -1, +1, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, -1, +1, -1, +1, +1, +1, -1, -1, +1, -1, -1, -1, -1, -1,... +1, -1, +1 ]; 4x/2x HE-LTF of 20MHz Le Liu, Huawei, et. al. Slide 26

27. doc.: IEEE 802.11-15/1334r1 Submission UL PAPR of 20MHz 4x HE-LTF 3.783.67 3.78 3.82 3.783.67 3.78 4.905.12 4.90 4.815.30 5.36 7 DC 26 52 26 242 + 3 DC 102+4 pilots 1 1 1 1 13 1 1 1 1 5 Edge 6 Edge 7 DC 13 7 DC HE20 -116 -90 -48 -22 22 48 90 116 -102 -76 -62 -36 -10 10 36 62 76 102 pilot tone index Worst PAPR (dB) of proposed HE-LTF @20MHz -1.7~-3.6 -1.1~-1.7 -0.4~-1.5 -1.2 PAPR reduction over VHT-LTF The proposed HE-LTF of 20MHz has uniform worst case PAPR distribution and lower PAPR than that of VHT-LTF for 26/52/106/242-RU sizes (all<5.4dB) Note: Worst PAPR is the max PAPR for the HE-LTF tones except pilot tones multiplied by elements of 2x2, 4x4, 6x6, 8x8 P matrix Le Liu, Huawei, et. al. Slide 27

28. doc.: IEEE 802.11-15/1334r1 Submission UL PAPR of 20MHz 2x HE-LTF 4.514.324.464.51 4.10 4.514.324.464.51 4.204.294.204.29 4.594.92 5.24 Worst PAPR (dB) of proposed HE-LTF @20MHz -0.9~-2.8 -2.0~-2.3 -0.8~-1.7 -1.3 PAPR reduction over VHT-LTF The proposed HE-LTF of 20MHz has uniform worst case PAPR distribution and lower PAPR than that of VHT-LTF for 26/52/106/242-RU sizes (all<5.4dB) Note: Worst PAPR is the max PAPR for the HE-LTF tones except pilot tones multiplied by elements of 2x2, 4x4, 6x6, 8x8 P matrix Le Liu, Huawei, et. al. Slide 28 7 DC 26 52 26 242 + 3 DC 102+4 pilots 1 1 1 1 13 1 1 1 1 5 Edge 6 Edge 7 DC 13 7 DC HE20 -116 -90 -48 -22 22 48 90 116 -102 -76 -62 -36 -10 10 36 62 76 102 pilot tone index

29. doc.: IEEE 802.11-15/1334r1 Submission DL PAPR of 20MHz 4x/2x HE-LTF Combinations of RU allocation in DL OFDMA Test cases of 40MHz Worst PAPR in dB 4x HE-LTF2x HE-LTF RU-2425.365.24 RU106 + RU26 + RU1065.675.14 RU52 + RU52 + RU26 + RU52 + RU525.594.58 Le Liu, Huawei, et. al. Slide 29

30. doc.: IEEE 802.11-15/1334r1 Submission In 11ac, the VHT-LTF of 40/80MHz use two and four repetition of the 20 MHz VHT- LTF, leading to high PAPR. Gamma is used to reduce the PAPR. In 11ax, HE-LTF preamble sequences are optimized for low PAPR in 80/40/20MHz. No additional tone rotation required. Scaling by 4x the indices of the 11ac gamma tone rotation requires changing the value within all the RU and not on the boundary  highly undesirable –Using a tone rotation just complicates the enumeration of the sequence in the spec and the implementation of OFDMA – Gamma is not really needed for payload or HE-LTF/STF  Propose to not apply Gamma on HE-STF and beyond Gamma (tone rotation) in 11ax -256 - 259 -258 -500 :: :: :: :: :: :: :: Le Liu, Huawei, et. al. Slide 30

31. doc.: IEEE 802.11-15/1334r1 Submission Summary We propose –The 4x/2x HE-LTF sequences for 80/40/20MHz with optimized PAPR for DL/UL OFDMA. –In all transmission modes, HE-STF and HE-LTF only populate RUs that are populated in the data field. –Do not apply Gamma on HE-STF and beyond. Slide 31Le Liu, Huawei, et. al.

32. doc.: IEEE 802.11-15/1334r1 Submission References [1] 11-15-0330-05-00ax-ofdma-numerology-and-structure [2] 11-15-0819-01-00ax-11ax-ofdma-tone-plan-leftover-tones-and-pilot- structure [3] 11-15-0812-01-00ax-pilot-design-for-data-section Slide 32 Le Liu, Huawei, et. al.

33. doc.: IEEE 802.11-15/1334r1 Submission SP#1 Do you support to add to SFD –4x/2x HE-LTF sequences for 80MHz in slide 13-15 –4x/2x HE-LTF sequences for 40MHz in slide 20-21 –4x/2x HE-LTF sequences for 20MHz in slide 26 Y N A Slide 33 Le Liu, Huawei, et. al.

34. doc.: IEEE 802.11-15/1334r1 Submission SP#2 Do you support to add to SFD –In all transmission modes, HE-STF and HE-LTF only populate RUs that are populated in the data field. Y N A Slide 34Le Liu, Huawei, et. al.

35. doc.: IEEE 802.11-15/1334r1 Submission SP#3 Do you support to add to SFD –Gamma (tone rotation as defined in 22.3.7.5) is not applied on HE-STF and beyond. TBD in case of a duplicated HE PPDU (if ever defined) Y N A Slide 35Le Liu, Huawei, et. al.

36. doc.: IEEE 802.11-15/1334r1 Submission Appendix: QAM Data PAPR Slide 36 Le Liu, Huawei, et. al.

37. doc.: IEEE 802.11-15/1334r1 Submission Appendix: P-matrix w = exp(-1i*2*pi/6); Slide 37 Le Liu, Huawei, et. al.