1. UL MU Clarification Date: 2016-09-12 Authors: September, 2016 Name
Affiliation
Address
Phone
Ron Porat
Broadcom
Sriram Venkateswaran
Matthew Fischer
Zhou Lan
Leo Montreuil
Andrew Blanksby
Vinko Erceg
Mingyue Ji
Ron Porat, Broadcom, et. al.

2. Authors (continued) September, 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
Ron Porat, Broadcom, et. al.

3. Authors (continued) September, 2016 Rolf De Vegt Sameer Vermani
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
Ron Porat, Broadcom, et. al.

4. 2111 NE 25th Ave, Hillsboro OR 97124, USA
September, 2016
Authors (continued)
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
Ron Porat, Broadcom, et. al.

5. Authors (continued) September, 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
Ron Porat, Broadcom, et. al.

6. Authors (continued) September, 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
Ron Porat, Broadcom, et. al.

7. Authors (continued) September, 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
Ron Porat, Broadcom, et. al.

8. Authors (continued) September, 2016 Jinmin Kim LG Electronics
Name
Affiliation
Address
Phone
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 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
Ron Porat, Broadcom, et. al.

9. Authors (continued) September, 2016 Fei Tong Samsung Hyunjeong Kang
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  
Shoko Shinohara
Yusuke Asai  
Koichi Ishihara  
Junichi Iwatani  
Akira Yamada
NTT DOCOMO
3-6, Hikarinooka, Yokosuka-shi, Kanagawa, , Japan
 3759
Ron Porat, Broadcom, et. al.

10. Authors (continued) September, 2016 Ron Porat, Broadcom, et. al. Name
Affiliation
Address
Phone
Masahito Mori
Sony Corp.
Yusuke Tanaka
Yuichi Morioka
Kazuyuki Sakoda
William Carney
Tomoko Adachi
Toshiba
Narendar Madhavan
Kentaro Taniguchi
Toshihisa Nabetani
Tsuguhide Aoki
Koji Horisaki
David Halls
Filippo Tosato
Zubeir Bocus
Fengming Cao
Parag Kulkarni
Ron Porat, Broadcom, et. al.

11. Authors (continued) September, 2016 Ron Porat, Broadcom, et. al.
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
Ron Porat, Broadcom, et. al.

12. Outline Provide two clarifications for UL Trig PPDU: September, 2016
Adjustments for beamforming in UL Trig PPDU
Construction of 1x LTF for UL MU-MIMO
Ron Porat, Broadcom, et. al.

13. Beamforming in UL September, 2016
Currently the AP decides on all parameters for UL Trig PPDU except for beamforming -beamforming for STA that are capable of beamforming in the UL is decided by the STA.
However, if the STA is not careful it may not meet the target RSSI provided by the AP if it changes transmission modes from open loop to beamforming or vice versa.
We therefore propose to add the following text: A STA that applies beamforming (BF) in the UL should take the BF gain into account when calculating the transmit power needed to meet the target RSSI.
Ron Porat, Broadcom, et. al.

14. 1x LTF for UL MU-MIMO September, 2016
Currently in draft 0.4: “It is mandatory to support transmission of 1x HE-LTF in an UL MU-MIMO PPDU over the full bandwidth, for a STA declaring support for UL MU-MIMO”.
1xLTF was added in July as mandatory feature at the STA to enable the AP to decode UL MU-MIMO without the need to do CFO estimation during the HE-LTF field
Note that using 2x LTF and especialy 4x LTF is more likely to require CFO estimation during the HE-LTF field since the duration of that field is 2x or 4x longer
To minimize transmission options for the newly adopted mode, maximize performance, and keep PAPR low we propose to only have one option, namely use no pilots (as in 11n) and no P matrix masking:
Provides better performance than SS pilots since every 4th tone is occupied
P matrix masking increases PAPR from the designed range of 4-5dB to 7.5dB
Ron Porat, Broadcom, et. al.

15. September, 2016
SP #1
Do you support adding to D0.4 in page 227 line 7 the following statement: A STA that applies beamforming (BF) in the UL should take the BF gain into account when calculating the transmit power needed to meet the target RSSI.
Ron Porat, Broadcom, et. al.

16. September, 2016
SP #2
Do you support to add to D0.4 on page 186 line 52 (after “It is mandatory to support transmission of 1x HE-LTF in an UL MU-MIMO PPDU over the full bandwidth, for a STA declaring support for UL MU-MIMO”) the following sentence: When 1xLTF is used for full BW UL MU-MIMO, no pilots (in the LTF field) or frequency domain masking are applied.
Yes No
ABS
Ron Porat, Broadcom, et. al.