doc.: IEEE 802.11-15/1357r1
Submission
Extra tones in the preambleNovember, 2015
Slide 1
Date: 2015-11-06Authors:
Intel, Marvell, et. al.
Name Affiliation Address Phone Email
Robert Stacey
Intel
2111 NE 25th Ave, Hillsboro OR 97124,
USA
+1-503-724-893
Shahrnaz Azizi [email protected]
Po-Kai Huang [email protected]
Qinghua Li [email protected]
Xiaogang Chen [email protected]
Chitto Ghosh [email protected]
Laurent Cariou [email protected]
Yaron Alpert [email protected]
Assaf Gurevitz [email protected]
Ilan Sutskover [email protected]
doc.: IEEE 802.11-15/1357r1
Submission Slide 2
Authors (continued)
Name Affiliation Address Phone Email
Hongyuan Zhang
Marvell5488 Marvell Lane,Santa Clara, CA, 95054
408-222-2500
Yakun Sun [email protected]
Lei Wang [email protected]
Liwen Chu [email protected]
Jinjing Jiang [email protected]
Yan Zhang [email protected]
Rui Cao [email protected]
Sudhir Srinivasa [email protected]
Bo Yu [email protected]
Saga Tamhane [email protected]
Mao Yu [email protected]
Xiayu Zheng [email protected]
Christian Berger [email protected]
Niranjan Grandhe [email protected]
Hui-Ling Lou [email protected]
doc.: IEEE 802.11-15/1357r1
Submission Slide 3
Authors (continued)
Name Affiliation Address Phone Email
Alice Chen
Qualcomm
5775 Morehouse Dr. San Diego, CA, USA [email protected]
Albert Van Zelst Straatweg 66-S Breukelen, 3621 BR Netherlands [email protected]
Alfred Asterjadhi 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Arjun Bharadwaj 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Bin Tian 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Carlos Aldana 1700 Technology Drive San Jose, CA 95110, USA [email protected]
George Cherian 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Gwendolyn Barriac 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Hemanth Sampath 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Lin Yang 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Menzo Wentink Straatweg 66-S Breukelen, 3621 BR Netherlands [email protected]
m
Naveen Kakani2100 Lakeside Boulevard
Suite 475, RichardsonTX 75082, USA
Raja Banerjea 1060 Rincon Circle San JoseCA 95131, USA [email protected]
Richard Van Nee Straatweg 66-S Breukelen, 3621 BR Netherlands [email protected]
doc.: IEEE 802.11-15/1357r1
Submission Slide 4
Authors (continued)
Name Affiliation Address Phone Email
Rolf De Vegt
Qualcomm
1700 Technology Drive San Jose, CA 95110, USA [email protected]
Sameer Vermani 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Simone Merlin 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Tao Tian 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Tevfik Yucek 1700 Technology Drive San Jose, CA 95110, USA [email protected]
VK Jones 1700 Technology Drive San Jose, CA 95110, USA [email protected]
Youhan Kim 1700 Technology Drive San Jose, CA 95110, USA [email protected]
Ron Porat
Broadcom
Sriram Venkateswaran [email protected]
Matthew Fischer
Leo MontreuilAndrew Blanksby
Vinko Erceg
doc.: IEEE 802.11-15/1357r1
Submission Slide 5
Authors (continued)
Joonsuk Kim
Apple
Aon Mujtaba [email protected]
Guoqing Li [email protected]
Eric Wong [email protected]
Chris Hartman [email protected]
Name Affiliation Address Phone Email
James Yee
Mediatek
No. 1 Dusing 1st Road, Hsinchu, Taiwan +886-3-567-0766 [email protected]
Alan Jauh [email protected]
Chingwa Hu [email protected]
Frank Hsu [email protected]
Thomas Pare
MediatekUSA
2860 Junction Ave, San Jose, CA 95134, USA +1-408-526-1899 [email protected]
ChaoChun Wang [email protected]
James Wang [email protected]
Jianhan Liu [email protected]
Tianyu Wu [email protected]
Zhou Lan [email protected]
Russell Huang [email protected]
m
doc.: IEEE 802.11-15/1357r1
Submission Slide 6
Authors (continued)
Name Affiliation Address Phone Email
Peter Loc
Huawei
Le Liu F1-17, Huawei Base, Bantian, Shenzhen +86-18601656691 [email protected]
Jun Luo 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai [email protected]
Yi Luo F1-17, Huawei Base, Bantian, Shenzhen +86-18665891036 [email protected]
Yingpei Lin 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai [email protected]
Jiyong Pang 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai [email protected]
Zhigang Rong10180 Telesis Court, Suite
365, San Diego, CA 92121 NA
Rob Sun 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada [email protected]
David X. Yang F1-17, Huawei Base, Bantian, Shenzhen [email protected]
Yunsong Yang10180 Telesis Court, Suite
365, San Diego, CA 92121 NA
Junghoon Suh 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada [email protected]
Jiayin Zhang 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai +86-18601656691 [email protected]
Edward Au 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada [email protected]
Teyan Chen F1-17, Huawei Base, Bantian, Shenzhen [email protected]
Yunbo Li F1-17, Huawei Base, Bantian, Shenzhen [email protected]
doc.: IEEE 802.11-15/1357r1
Submission Slide 7
Authors (continued)
Name Affiliation Address Phone Email
Jinmin Kim
LG Electronics19, Yangjae-daero 11gil, Seocho-gu, Seoul 137-
130, Korea
Kiseon Ryu [email protected]
Jinyoung Chun [email protected]
Jinsoo Choi [email protected]
Jeongki Kim [email protected]
Dongguk Lim [email protected]
Suhwook Kim [email protected]
Eunsung Park [email protected]
JayH Park [email protected]
HanGyu Cho [email protected]
Thomas Derham Orange [email protected]
Bo Sun
ZTE
#9 Wuxingduan, Xifeng Rd., Xi'an, China [email protected]
Kaiying Lv [email protected] Fang [email protected]
Ke Yao [email protected] Xing [email protected] Hart
Cisco Systems 170 W Tasman Dr, San Jose, CA 95134
[email protected] Monajemi [email protected]
doc.: IEEE 802.11-15/1357r1
Submission Slide 8
Authors (continued)
Name Affiliation Address Phone Email
Fei Tong
Samsung
Innovation Park, Cambridge CB4 0DS (U.K.) +44 1223 434633 [email protected]
Hyunjeong Kang Maetan 3-dong; Yongtong-GuSuwon; South Korea +82-31-279-9028 [email protected]
Kaushik Josiam 1301, E. Lookout Dr, Richardson TX 75070 (972) 761 7437 [email protected]
Mark Rison Innovation Park, Cambridge CB4 0DS (U.K.) +44 1223 434600 [email protected]
Rakesh Taori 1301, E. Lookout Dr, Richardson TX 75070 (972) 761 7470 [email protected]
Sanghyun Chang Maetan 3-dong; Yongtong-GuSuwon; South Korea +82-10-8864-1751 [email protected]
Yasushi Takatori
NTT 1-1 Hikari-no-oka, Yokosuka, Kanagawa 239-0847 Japan
Yasuhiko Inoue [email protected]
Shoko Shinohara [email protected]
Yusuke Asai [email protected]
Koichi Ishihara [email protected]
Junichi Iwatani [email protected]
Akira Yamada
NTT DOCOMO
3-6, Hikarinooka, Yokosuka-shi, Kanagawa, 239-8536, Japan [email protected]
Fujio Watanabe3240 Hillview Ave, Palo Alto,
CA 94304
Haralabos Papadopoulos hpapadopoulos@docomoinnova
tions.com
doc.: IEEE 802.11-15/1357r1
Submission Slide 9
Authors (continued)
Name Affiliation Address Phone Email
Masahito Mori
Sony Corp.
Yusuke Tanaka [email protected]
Yuichi Morioka [email protected]
Kazuyuki Sakoda [email protected]
William Carney [email protected]
doc.: IEEE 802.11-15/1357r1
Submission
Outline• To increase data subcarriers in SIG-A/SIG-B, we propose to
allocate 4 extra subcarriers to 1x portion of the HE preamble not including L-STF and L-LTF fields.
• With extra tones, there are some power imbalance issues need to be discussed.
Intel, Marvell, et. al.Slide 9
November, 2015
doc.: IEEE 802.11-15/1357r1
Submission
• Due to the limitation that L-LTF covers only 52 subcarriers, HE-SIG-A/HE-SIG-B can only transmit information on 48 subcarriers. – More payloads were added in HE-SIG-A for 11ax– HE-SIG-B may need to convey large amount of information depending
on the number of scheduled STAs• Propose to add training subcarriers in L-SIG
– This extension provides extra channel estimates for the subsequent symbols (HE-SIGA/HE-SIGB)
– Symbols that follow L-SIG will have a subcarrier allocation similar to 11n/ac
Intel, Marvell, et. al.Slide 11
Motivation for extra subcarriers in the HE preamble
November, 2015
doc.: IEEE 802.11-15/1357r1
Submission
Increased Subcarrier Allocation in L-SIG
• Allocate additional subcarriers in L-SIG– They are extended L-LTF subcarriers used for channel estimation;– Allows more data bits in HE-SIG-A and HE-SIG-B than that of the L-
SIG– The repeated extra subcarriers in RL-SIG allow comparable SNR
performance as L-LTF
Intel, Marvell, et. al.Slide 12
L-STF L-LTF L-SIG R-L-SIG HE-SIGA1 HE-SIGA2 HE-SIGB
November, 2015
doc.: IEEE 802.11-15/1357r1
Submission
Impacts to legacy/11ax devices
• For legacy devices:– The extension would not impact the performance of legacy
devices in decoding L-SIG;– The extended subcarriers are simply disregarded by the
legacy devices.
• For 11ax devices:– Aware of the additional subcarriers and use them for
channel estimation;– Decoding L-SIG similar to legacy devices.
Intel, Marvell, et. al.Slide 13
November, 2015
doc.: IEEE 802.11-15/1357r1
Submission
Power Adjustment
• We propose to transmit L-SIG, RL-SIG, HE-SIG-A and HE-SIG-B with the same total power as L-LTF field – We could scale the power on L-SIG and RL-SIG to maintain
the same power per tone as in L-LTF. But keeping the same power per OFDM symbol is more straightforward.
• By keeping the same power per symbol in L-SIG/RL-SIG and L-LTF, the estimated channel on L-LTF and those obtained from extra subcarriers of L-SIG/RL-SIG have slightly power imbalance. – Friendly to amplitude immunity modulation (BPSK/QPSK);– If 16QAM/64QAM is applied in SIGB, receiver may choose to de-
boost the CE with factor sqrt(52/56) on the tones spanned by L-LTF.
Slide 14 Intel, Marvell, et. al.
November, 2015
doc.: IEEE 802.11-15/1357r1
Submission
Summary
• To increase HE-SIG-A/HE-SIG-B payload, propose to add 4 extra subcarriers on L-SIG and RL-SIG for additional LTF training.– Add 4 extra tones starting from L-SIG, through R-LSIG,
HE-SIG-A and HE-SIG-B fields.
• Propose to transmit L-SIG, RL-SIG, HE-SIG-A and HE-SIG-B with the same total power as L-LTF field.– Receiver adjusts the power of estimated channel accordingly
if higher modulation order (>QPSK) is used on HE-SIG-B.
November, 2015
Intel, Marvell, et. al.Slide 15
doc.: IEEE 802.11-15/1357r1
Submission
Straw poll
• Do you support to:– Allocate 4 extra subcarriers, two at each edge of each 20MHz sub-
channel, for L-SIG, RL-SIG, HE-SIG-A and HE-SIG-B fields in 11ax PPDUs.• The 4 subcarriers added to the L-SIG and RL-SIG fields are
transmitted with known TBD BPSK constellations (+-1).• The number of data subcarriers in HE-SIG-A and HE-SIG-B fields
are increased by 4 in each 20MHz sub-channel.• L-SIG, RL-SIG, HE-SIG-A and HE-SIG-B fields are always
transmitted with the same total power as L-LTF field (in cases when L-LTF is not being boosted).
Slide 16 Intel, Marvell, et. al.
November, 2015
