1. HE-STF Sequences for 160/80+80MHz
Month Year
doc.: IEEE yy/xxxxr0
March 2016
HE-STF Sequences for 160/80+80MHz
Date:
Authors:
Name
Affiliation
Address
Phone
Eunsung Park
LG Electronics
19, Yangjae-daero 11gil, Seocho-gu, Seoul , Korea
Jinsoo Choi
Jinyoung Chun
Dongguk Lim
Jinmin Kim
Kiseon Ryu
Jeongki Kim
Suhwook Kim
Hyeyoung Choi
HanGyu Cho
Eunsung Park, LG Electronics
John Doe, Some Company

2. 2111 NE 25th Ave, Hillsboro OR 97124, USA
March 2016
Authors (continued)
Name
Affiliation
Address
Phone
Ron Porat
Broadcom
Sriram Venkateswaran
Matthew Fischer
Zhou Lan
Leo Montreuil
Andrew Blanksby
Vinko Erceg
Mingyue Ji
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
Eunsung Park, LG Electronics

3. Authors (continued) March 2016 Hongyuan Zhang Marvell
Name
Affiliation
Address
Phone
Hongyuan Zhang
Marvell
5488 Marvell Lane, Santa Clara, CA, 95054
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
Eunsung Park, LG Electronics

4. Authors (continued) March 2016 Alice Chen Albert Van Zelst
Name
Affiliation
Address
Phone
Alice Chen
Qualcomm
5775 Morehouse Dr. San Diego, CA, USA
Albert Van Zelst
Straatweg 66-S Breukelen, 3621 BR Netherlands
Alfred Asterjadhi
Arjun Bharadwaj
Bin Tian
Carlos Aldana
1700 Technology Drive San Jose, CA 95110, USA
George Cherian
Gwendolyn Barriac
Hemanth Sampath
Lin Yang
Menzo Wentink
Naveen Kakani
2100 Lakeside Boulevard Suite 475, Richardson TX 75082, USA
Raja Banerjea
1060 Rincon Circle San Jose CA 95131, USA
Richard Van Nee
Eunsung Park, LG Electronics

5. Authors (continued) March 2016 Rolf De Vegt Sameer Vermani Qualcomm
Name
Affiliation
Address
Phone
Rolf De Vegt
Qualcomm
1700 Technology Drive San Jose, CA 95110, USA
Sameer Vermani
5775 Morehouse Dr. San Diego, CA, USA
Simone Merlin
Tao Tian
Tevfik Yucek  
VK Jones
Youhan Kim

6. Authors (continued) March 2016 Jianhan Liu Mediatek USA
Name
Affiliation
Address
Phone
Jianhan Liu
Mediatek
USA
2860 Junction Ave, San Jose, CA 95134, USA
Thomas Pare
ChaoChun Wang
James Wang
Tianyu Wu
Russell Huang
James Yee
No. 1 Dusing 1st Road, Hsinchu, Taiwan  
Alan Jauh
Frank Hsu
Joonsuk Kim
Apple
Aon Mujtaba  
Guoqing Li
Eric Wong
Chris Hartman
Eunsung Park, LG Electronics

7. Authors (continued) March 2016 David X. Yang Jiayin Zhang Jun Luo
Name
Affiliation
Address
Phone
David X. Yang
Huawei
F1-17, Huawei Base, Bantian, Shenzhen
Jiayin Zhang
5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai
Jun Luo
Yi Luo
Yingpei Lin
Jiyong Pang
Zhigang Rong
10180 Telesis Court, Suite 365, San Diego, CA  NA
Jian Yu
Ming Gan
Yunsong Yang
Junghoon Suh
303 Terry Fox, Suite 400 Kanata, Ottawa, Canada
Peter Loc
Edward Au
Teyan Chen
Yunbo Li
Eunsung Park, LG Electronics

8. Authors (continued) March 2016 Fei Tong Hyunjeong Kang Samsung
Name
Affiliation
Address
Phone
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 75070
(972)
Mark Rison
Rakesh Taori
(972)
Sanghyun Chang
Yasushi Takatori
NTT
1-1 Hikari-no-oka, Yokosuka, Kanagawa Japan
Yasuhiko Inoue
Yusuke Asai
Koichi Ishihara
Junichi Iwatani
Shoko Shinohara
Akira Yamada
NTT DOCOMO
3-6, Hikarinooka, Yokosuka-shi, Kanagawa, , Japan
Fujio Watanabe
3240 Hillview Ave, Palo Alto, CA 94304
Haralabos Papadopoulos
Eunsung Park, LG Electronics

9. #9 Wuxingduan, Xifeng Rd., Xi'an, China
March 2016
Authors (continued)
Name
Affiliation
Address
Phone
Yuichi Morioka
Sony Corporation
1-7-1 Konan  Minato-ku, Tokyo , Japan 
Masahito Mori
Yusuke Tanaka
Kazuyuki Sakoda
William Carney
Thomas Derham
Orange
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 95134
Pooya Monajemi
Eunsung Park, LG Electronics

10. Authors (continued) March 2016 Eunsung Park, LG Electronics Name
Affiliation
Address
Phone
Tomoko Adachi
Toshiba
Narendar Madhavan
Kentaro Taniguchi
Toshihisa Nabetani
Tsuguhide Aoki
Koji Horisaki
David Halls
Filippo Tosato
Zubeir Bocus
Fengming Cao
Parag Kulkarni
Eunsung Park, LG Electronics

11. Authors (continued) March 2016 Eunsung Park, LG Electronics
Minho Cheong
Newracom, Inc.
9008 Research Dr, Irvine, CA 92618
Reza Hedayat
Young Hoon Kwon
Yongho Seok
Daewon Lee
Yujin Noh
Sigurd Schelstraete
Quantenna
3450 W. Warren Ave, Fremont, CA 94538
Huizhao Wang
Eunsung Park, LG Electronics

12. March 2016
Introduction
1x/2x HE-STF sequences have been agreed for 20/40/80MHz [1]
In this contribution, we propose 1x/2x HE-STF sequences for 160/80+80MHz based on the agreed 1x/2x HE-STF sequences for 80MHz, respectively
The agreed HE-STF sequences for 80MHz are just used for the primary 80MHz HE-STF sequences
To determine the secondary 80MHz HE-STF sequences, we simply apply the optimized phase rotation to each 20MHz sub-band of the primary 80MHz HE-STF sequences
The phase rotation values are optimized in terms of the PAPR
For the 1x HE-STF, we only consider the entire band (160/80+80MHz) PAPR
For the 2x HE-STF, we consider PAPR of all of the RUs as well as the entire band PAPR
Eunsung Park, LG Electronics

13. Proposal – 1x HE-STF 1x HE-STF160MHz(-1008:16:1008)
March 2016
Proposal – 1x HE-STF
1x HE-STF160MHz(-1008:16:1008)
= [M, 1, -M, 0, -M, 1, -M, 0, -1*[M, 1, -M], 0, -M, 1, -M] *(1+j)/sqrt(2)
M = { }
1x HE-STF80+80MHz
= [1x HE-STF80MHz,Prime, 1x HE-STF80MHz,Second]
We choose phase rotation values which minimize the maximum PAPR among all of the 160/80+80 MHz cases
1x HE-STF80MHz,Prime
 agreed 80MHz 1x HE-STF sequence [1]
1x HE-STF80MHz,Second
 Phase rotation of 180° is applied to the first 40MHz sub-band of the agreed 80MHz 1x HE-STF sequence [1]
Eunsung Park, LG Electronics

14. Proposal – 2x HE-STF March 2016 2x HE-STF160MHz(-1016:8:1016)
= [M, -1, M, -1, -M, -1, M, 0, -M, 1, M, 1, -M, 1, -M, 0,
-1*[M, -1, M, -1, -M, -1, M], 0, -M, 1, M, 1, -M, 1, -M] *(1+j)/sqrt(2)
2x HE-STF160MHz(±1016) = 0
2x HE-STF160MHz(±8) = 0
2x HE-STF80+80MHz
= [2x HE-STF80MHz,Prime, 2x HE-STF80MHz,Second]
We choose phase rotation values which minimize the maximum PAPR among all of the RUs and 160/80+80 MHz cases
2x HE-STF80MHz,Prime
 agreed 80MHz 2x HE-STF sequence [1]
2x HE-STF80MHz,Second
 Phase rotation of 180° is applied to the first 40MHz sub-band of the agreed 80MHz 2x HE-STF sequence [1]
Eunsung Park, LG Electronics

15. Channel Interval [MHz]
March 2016
PAPR – 1x HE-STF
1x HE-STF for the entire band
160MHz PAPR : 5.93/5.05 (dup.(1)/proposed)
80+80MHz PAPR
Channel Interval [MHz]
Dup.
[dB]
Proposed [dB]
80 (adjacent)
5.93
5.05
100
7.08
5.13
120
7.37
5.01
140
7.54
5.47
160
5.31
180
7.35
200
7.05
5.20
220
7.34
240
5.40
>240 (up to 500)
7.57
(1) Duplicated sequence, i.e., the secondary 80MHz sequence is equal to the primary 80MHz sequence
Eunsung Park, LG Electronics

16. PAPR – 2x HE-STF (1/2) 2x HE-STF for all RUs March 2016
Prime[dB] / Second[dB]
2.22/
2.22
2.48/
2.48
4.77/
4.77
1.94/
3.01
2.90/2.90
4.52/4.52
4.26/4/26
5.21/5.21
4.80/4.80
3.85/3.85
4.26/4.26
5.39/5.39
4.39/4.39
5.40/5.40
5.50/5..50
5.61/5.61
4.79/4.79
5.77/6.97
Eunsung Park, LG Electronics

17. Channel Interval [MHz]
March 2016
PAPR – 2x HE-STF(2/2)
2x HE-STF for the entire band
160MHz PAPR : 7.87/6.34 (dup.(1)/proposed)
80+80MHz PAPR
Channel Interval [MHz]
Dup.
[dB]
Proposed [dB]
80 (adjacent)
7.87
6.34
100
8.43
6.25
120
8.62
6.67
140
8.75
6.99
160
8.78
6.70
180
8.65
6.69
200
8.46
6.78
220
240
8.59
6.83
>240 (up to 500)
8.79
(1) Duplicated sequence, i.e., the secondary 80MHz sequence is equal to the primary 80MHz sequence
Eunsung Park, LG Electronics

18. Conclusion We proposed 1x/2x HE-STF sequences for 160/80+80MHz
March 2016
Conclusion
We proposed 1x/2x HE-STF sequences for 160/80+80MHz
The secondary 80MHz HE-STF sequences are designed by applying phase rotation of 180° to the first 40MHz sub-band of the primary 80MHz HE-STF sequences
Compared to the duplicated sequences, the proposed sequences have quite low PAPR
Eunsung Park, LG Electronics

19. March 2016
Straw poll #1
Do you agree to add the following 1x/2x HE-STF sequences for 160/80+80MHz to the 11ax SFD?
1x HE-STF160MHz(-1008:16:1008) = [M, 1, -M, 0, -M, 1, -M, 0, -M, -1, M, 0, -M, 1, -M] *(1+j)/sqrt(2)
M = { }
1x HE-STF80+80MHz = [1x HE-STF80MHz,Prime, 1x HE-STF80MHz,Second]
1x HE-STF80MHz,Prime(-496:16:496) = [M, 1, -M, 0, -M, 1, -M] *(1+j)/sqrt(2)
1x HE-STF80MHz, Second(-496:16:496) = [-M, -1, M, 0, -M, 1, -M] *(1+j)/sqrt(2)
2x HE-STF160MHz(-1016:8:1016) = [M, -1, M, -1, -M, -1, M, 0, -M, 1, M, 1, -M, 1, -M, 0,
-M, 1, -M, 1, M, 1, -M, 0, -M, 1, M, 1, -M, 1, -M] *(1+j)/sqrt(2)
2x HE-STF160MHz(±1016) = 0
2x HE-STF160MHz(±8) = 0
2x HE-STF80+80MHz = [2x HE-STF80MHz,Prime, 2x HE-STF80MHz,Second]
2x HE-STF80MHz,Prime(-504:8:504) = [M, -1, M, -1, -M, -1, M, 0, -M, 1, M, 1, -M, 1, -M] *(1+j)/sqrt(2)
2x HE-STF80MHz,Prime(±504) = 0
2x HE-STF80MHz, Second(-504:8:504) = [-M, 1, -M, 1, M, 1, -M, 0, -M, 1, M, 1, -M, 1, -M] *(1+j)/sqrt(2)
2x HE-STF80MHz,Second(±504) = 0
Eunsung Park, LG Electronics

20. References [1] 11-15-0132-15-00ax-spec-framework March 2016
Eunsung Park, LG Electronics

21. (all RUs except for 2x996 RUs)
March 2016
Appendix
Worst PAPR comparison between HE-LTF and HE-STF BW
4x HE-LTF
2x HE-LTF
1x HE-LTF
2x HE-STF
1x HE-STF
160MHz
(all RUs except for 2x996 RUs)
7.10
6.70 -
6.97
(entire band)
7.09
6.72
5.12
6.34
5.05
80+80MHz
7.20
7.27
5.45
6.99
5.47
Eunsung Park, LG Electronics