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Power Scaling for Channel Training Signals
July 2008 doc.: IEEE /1021r0 Power Scaling for Channel Training Signals Date: Name Affiliation Address Phone Po-Kai Huang Intel 2200 Mission College Blvd., Santa Clara, CA 95054, USA Robert Stacey Qinghua Li Shahrnaz Azizi Xiaogang Chen Chitto Ghosh Laurent Cariou Yaron Alpert Assaf Gurevitz Ilan Sutskover Xiaogang Chen et al. (Intel) Peter Loc
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Authors (continued) Alice Chen Albert Van Zelst Alfred Asterjadhi
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 Bin Tian Carlos Aldana 1700 Technology Drive San Jose, CA 95110, USA George Cherian Gwendolyn Barriac Hemanth Sampath Lin Yang Lochan Verma 5775 Morehouse Dr. San Diego, CA USA 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
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Authors (continued) Rolf De Vegt Sameer Vermani Qualcomm Simone Merlin
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 Tevfik Yucek VK Jones Youhan Kim
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Authors (continued) 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
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Authors (continued) Name Affiliation Ron Porat Broadcom
Address Phone Ron Porat Broadcom Sriram Venkateswaran Matthew Fischer Zhou Lan Leo Montreuil Andrew Blanksby Vinko Erceg Thomas Derham Mingyue Ji Xiaogang Chen et al. (Intel)
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Authors (continued) David X. Yang Jiayin Zhang Jun Luo Yi 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
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5488 Marvell Lane, Santa Clara, CA, 95054
Authors (continued) Name Affiliation Address Phone Hongyuan Zhang Marvell 5488 Marvell Lane, Santa Clara, CA, 95054 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
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Authors (continued) Jinmin Kim Kiseon Ryu Jinyoung Chun
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 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
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Authors (continued) Fei Tong Samsung Hyunjeong Kang Kaushik Josiam
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
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Authors (continued) Name Affiliation Address Phone Email Masahito Mori
Sony Corp. Yusuke Tanaka Yuichi Morioka Kazuyuki Sakoda William Carney Narendar Madhavan Toshiba Masahiro Sekiya Toshihisa Nabetani Tsuguhide Aoki Tomoko Adachi Kentaro Taniguchi Daisuke Taki Koji Horisaki David Halls Filippo Tosato Zubeir Bocus Fengming Cao
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Authors (continued) Name Affiliation Address Phone Email Minho Cheong
Newracom, Inc. 9008 Research Dr, Irvine, CA 92618 Reza Hedayat Young Hoon Kwon Yongho Seok Daewon Lee Yujin Noh Sigurd Schelstraete Quantenna Huizhao Wang
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Background (1/2) 4 tones are added to the edges of L-SIG / RL-SIG for channel training; In the extended range SU PPDU, L-LTF can be power boosted by 3dB but L-SIG / RL-SIG can’t; The 4 edge tones in L-SIG/RL-SIG have different per-tone power as L- LTF; Power scaling is needed if channel smoothing is applied. L-LTF power boosting is unknown to the receiver until PPDU type is detected L-LTF L-SIG R-L-SIG 2-tone LTF HE-SIG-A Intel
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Motivation Unify the receiver implementation for all PPDU format
Make 56 training tones have same per-tone power for all PPDU types Motion passed in last IEEE meeting that only except extended range SU PPDU [2], The per-tone power is the same between L-LTF and the 4 edge tones; Consistent receiver operation for all PPDU formats if smoothing is applied in L-LTF; Remove the delay due to PPDU type detection Intel
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Proposal Same per-tone power
Keep the per-tone power the same for all 56 training tones in extended range SU PPDU Same per-tone power 2-tone LTF HE-SIG-A L-LTF L-SIG R-L-SIG 2-tone LTF Intel
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Summary To simplify the receiver design, keep the same per-tone power between L-LTF and the 4 extra tones in L-SIG/RL-SIG for all PPDU format in the extended range SU PPDU. Intel
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Straw Poll 1 Do you agree to add to the TG Specification Frame work document? For the extended range SU PPDU, L-LTF per-tone power is boosted by 3 dB relative to HE-SIG-A, L-STF is transmitted with the same total power as L-LTF; The extra four tones on the edge of L-SIG/RL-SIG in 20MHz band have the same per-tone transmission power as the per-tone transmission power of L-LTF tones, while the other populated tones in L-SIG and RL-SIG have 3dB lower per-tone transmission power than L-LTF tones. Xiaogang Chen et al. (Intel)
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