doc.: IEEE /1334r1 Submission HE-LTF Sequence Design Date: Authors: NameAffiliationAddressPhone Le Liu Huawei F1-17, Huawei Base, Bantian, Shenzhen Xin Xue Ningjuan Wang Wei Lin Shimi Shilo 4 Ha'harash st., Hod Hasharon, Israel Genadiy Tsodik Doron Ezri Jiayin Zhang 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai Jun Luo Yingpei Lin Jiyong Pang Peter Loc Rob Sun 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada Junghoon Suh Zhigang Rong Telesis Court, Suite 365, San Diego, CA NA David X. Yang F1-17, Huawei Base, Bantian, Shenzhen Yi Luo Le Liu, Huawei, et. al. Slide 1 November, 2015

doc.: IEEE /1334r1 Submission Slide 2 Authors (continued) NameAffiliationAddressPhone Lin Yang Qualcomm 5775 Morehouse Dr. San Diego, CA, USA Alice Chen 5775 Morehouse Dr. San Diego, CA, USA Albert Van Zelst Straatweg 66-S Breukelen, 3621 BR Netherlands Alfred Asterjadhi 5775 Morehouse Dr. San Diego, CA, USA Arjun Bharadwaj 5775 Morehouse Dr. San Diego, CA, USA Bin Tian 5775 Morehouse Dr. San Diego, CA, USA Carlos Aldana 1700 Technology Drive San Jose, CA 95110, USA George Cherian 5775 Morehouse Dr. San Diego, CA, USA Gwendolyn Barriac 5775 Morehouse Dr. San Diego, CA, USA Hemanth Sampath 5775 Morehouse Dr. San Diego, CA, USA Menzo Wentink Straatweg 66-S Breukelen, 3621 BR Netherlands Naveen Kakani 2100 Lakeside Boulevard Suite 475, Richardson TX 75082, USA Raja Banerjea 1060 Rincon Circle San Jose CA 95131, USA Richard Van Nee Straatweg 66-S Breukelen, 3621 BR Netherlands Le Liu, Huawei, et. al. November, 2015

doc.: IEEE /1334r1 Submission Slide 3 Authors (continued) NameAffiliationAddressPhone Rolf De Vegt Qualcomm 1700 Technology Drive San Jose, CA 95110, USA Sameer Vermani 5775 Morehouse Dr. San Diego, CA, USA Simone Merlin 5775 Morehouse Dr. San Diego, CA, USA Tao Tian 5775 Morehouse Dr. San Diego, CA, USA Tevfik Yucek 1700 Technology Drive San Jose, CA 95110, USA VK Jones 1700 Technology Drive San Jose, CA 95110, USA Youhan Kim 1700 Technology Drive San Jose, CA 95110, USA Le Liu, Huawei, et. al. November, 2015

doc.: IEEE /1334r1 Submission Authors (continued) NameAffiliationAddressPhone Leo Montreuil Ron Porat Broadcom Matthew Fischer 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 Shahrnaz Azizi Po-Kai Huang Qinghua Li Xiaogang Chen Chitto Ghosh Laurent Cariou Yaron Alpert Assaf Gurevitz Ilan Sutskover

doc.: IEEE /1334r1 Submission Authors (continued) NameAffiliationAddressPhone Hongyuan Zhang Marvell 5488 Marvell Lane, Santa Clara, CA, Yakun Sun Lei Wang Liwen Chu Jinjing Jiang Yan Zhang Rui Cao Sudhir Srinivasa Bo Yu Saga Tamhane Mao Yu Xiayu Zheng Christian Berger Niranjan Grandhe Hui-Ling Lou Le Liu, Huawei, et. al. Slide 5 November, 2015

doc.: IEEE /1334r1 Submission Slide 6 Authors (continued) Joonsuk Kim Apple Aon Mujtaba Guoqing Li Eric Wong Chris NameAffiliationAddressPhone James Yee Mediatek No. 1 Dusing 1 st Road, Hsinchu, Taiwan Alan Jauh Chingwa Hu m Frank Hsu Thomas Pare Mediatek USA 2860 Junction Ave, San Jose, CA 95134, USA ChaoChun Wang om James Wang Jianhan Liu Tianyu Wu Zhou Lan Russell Huang m Le Liu, Huawei, et. al. November, 2015

doc.: IEEE /1334r1 Submission Slide 7 Authors (continued) NameAffiliationAddressPhone Jinmin Kim LG Electronics 19, Yangjae-daero 11gil, Seocho-gu, Seoul , Korea Kiseon Ryu Jinyoung Chun Jinsoo Choi Jeongki Kim Dongguk Lim Suhwook Kim Eunsung Park JayH Park HanGyu Cho Thomas DerhamOrange Bo Sun ZTE #9 Wuxingduan, Xifeng Rd., Xi'an, China Kaiying Lv Yonggang Fang Ke Yao Weimin Xing Brian Hart Cisco Systems 170 W Tasman Dr, San Jose, CA Pooya Monajemi Le Liu, Huawei, et. al. November, 2015

doc.: IEEE /1334r1 Submission Slide 8 Authors (continued) NameAffiliationAddressPhone Fei Tong Samsung Innovation Park, Cambridge CB4 0DS (U.K.) Hyunjeong Kang Maetan 3-dong; Yongtong-Gu Suwon; South Korea Kaushik Josiam 1301, E. Lookout Dr, Richardson TX (972) Mark Rison Innovation Park, Cambridge CB4 0DS (U.K.) Rakesh Taori 1301, E. Lookout Dr, Richardson TX (972) Sanghyun Chang Maetan 3-dong; Yongtong-Gu Suwon; South Korea Yasushi Takatori NTT 1-1 Hikari-no-oka, Yokosuka, Kanagawa Japan Yasuhiko Inoue Shoko Shinohara Yusuke Asai Koichi Ishihara Junichi Iwatani Akira Yamada NTT DOCOMO 3-6, Hikarinooka, Yokosuka- shi, Kanagawa, , Japan Fujio Watanabe 3240 Hillview Ave, Palo Alto, CA com Haralabos Papadopoulos tions.com Le Liu, Huawei, et. al. November, 2015

doc.: IEEE /1334r1 Submission Slide 9 Authors (continued) NameAffiliationAddressPhone Masahito Mori Sony Corp. Yusuke Yuichi Kazuyuki William Le Liu, Huawei, et. al. November, 2015

doc.: IEEE /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 Gamma=[+1 64,-1 64, -1 64,-1 64 ] Worst PAPR of VHT-LTF -122,122 w/ Le Liu, Huawei, et. al. Slide 10

doc.: IEEE /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

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

doc.: IEEE /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

doc.: IEEE /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

doc.: IEEE /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

doc.: IEEE /1334r1 Submission UL PAPR of 80MHz 4x HE-LTF Worst PAPR (dB) of proposed ~ ~ 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

doc.: IEEE /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) Worst PAPR (dB) of proposed -0.9~ ~ 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

doc.: IEEE /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 RU484 + RU26 + RU RU484 + RU26 + RU RU242 + RU242 + RU26 + RU242 + RU RU RU RU-26 + RU RU RU RU RU-26 + RU RU RU106 + RU26 +RU106 +RU242+RU26+ RU242+RU Le Liu, Huawei, et. al. Slide 18

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

doc.: IEEE /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

doc.: IEEE /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

doc.: IEEE /1334r1 Submission UL PAPR of 40MHz 4x HE-LTF HE40 12 Edge 11 Edge 5 DC 5DC5DC 5 DC 5DC5DC pilots tone index Worst PAPR (dB) of proposed 484-tone + 5DC 12 Edge11 Edge +0.5~ ~ ~-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

doc.: IEEE /1334r1 Submission UL PAPR of 40MHz 2x HE-LTF HE40 12 Edge 11 Edge 5 DC 5DC5DC 5 DC 5DC5DC pilots tone index Worst PAPR (dB) of proposed 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~ ~ 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

doc.: IEEE /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 row of 52-RU all occupied but no mid-center 26-RUs RU RU-26 +RU RU RU-26 + RU RU RU-26 +RU RU RU-26 + RU RU RU-26 +RU RU RU-26 + RU RU RU-26 +RU RU RU-26 + RU Le Liu, Huawei, et. al. Slide 24

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

doc.: IEEE /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

doc.: IEEE /1334r1 Submission UL PAPR of 20MHz 4x HE-LTF DC DC pilots Edge 6 Edge 7 DC 13 7 DC HE pilot tone index Worst PAPR (dB) of proposed -1.7~ ~ ~ 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

doc.: IEEE /1334r1 Submission UL PAPR of 20MHz 2x HE-LTF Worst PAPR (dB) of proposed -0.9~ ~ ~ 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 DC pilots Edge 6 Edge 7 DC 13 7 DC HE pilot tone index

doc.: IEEE /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 RU106 + RU26 + RU RU52 + RU52 + RU26 + RU52 + RU Le Liu, Huawei, et. al. Slide 29

doc.: IEEE /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 :: :: :: :: :: :: :: Le Liu, Huawei, et. al. Slide 30

doc.: IEEE /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.

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

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

doc.: IEEE /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.

doc.: IEEE /1334r1 Submission SP#3 Do you support to add to SFD –Gamma (tone rotation as defined in ) 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.

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

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