Transcript 11-16/0619
May 2016 doc.: IEEE 802.11-16/0619r0 PAPR Reduction for HE SIG-B Date: 2016-05-16 Authors: Name Affiliation Address Qualcomm 5775 Morehouse Dr. San Diego, CA, USA 5775 Morehouse Dr. San Diego, CA, USA Bin Tian Lin Yang Sameer Vermani Youhan Kim Submission 5775 Morehouse Dr. San Diego, CA, USA 1700 Technology Drive San Jose, CA 95110, USA Slide 1 Phone Email [email protected] [email protected] [email protected] [email protected] Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Authors (continued) Name Affiliation 5775 Morehouse Dr. San Diego, CA, USA Alice Chen Albert Van Zelst Alfred Asterjadhi Carlos Aldana George Cherian Gwendolyn Barriac Hemanth Sampath Lochan Verma Menzo Wentink Naveen Kakani Raja Banerjea Richard Van Nee Rolf De Vegt Simone Merlin Tevfik Yucek VK Jones Submission Address Qualcomm Straatweg 66-S Breukelen, 3621 BR Netherlands 5775 Morehouse Dr. San Diego, CA, USA 1700 Technology Drive San Jose, CA 95110, USA 5775 Morehouse Dr. San Diego, CA, USA 5775 Morehouse Dr. San Diego, CA, USA 5775 Morehouse Dr. San Diego, CA, USA 5775 Morehouse Dr. San Diego, CA, USA Straatweg 66-S Breukelen, 3621 BR Netherlands 2100 Lakeside Boulevard Suite 475, Richardson TX 75082, USA 1060 Rincon Circle San Jose CA 95131, USA Straatweg 66-S Breukelen, 3621 BR Netherlands 1700 Technology Drive San Jose, CA 95110, USA 5775 Morehouse Dr. San Diego, CA, USA 1700 Technology Drive San Jose, CA 95110, USA 1700 Technology Drive San Jose, CA 95110, USA Slide 2 Phone Email [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Authors (continued) Name Affiliation Address Phone Ron Porat Sriram Venkateswaran Matthew Fischer Email [email protected] [email protected] Zhou Lan Leo Montreuil Broadcom Andrew Blanksby Vinko Erceg Thomas Derham Mingyue Ji Robert Stacey [email protected] Shahrnaz Azizi [email protected] Po-Kai Huang [email protected] Qinghua Li Xiaogang Chen Chitto Ghosh Intel 2111 NE 25th Ave, Hillsboro OR 97124, USA [email protected] +1-503-724-893 [email protected] [email protected] Laurent Cariou [email protected] Yaron Alpert [email protected] Assaf Gurevitz [email protected] Ilan Sutskover Feng Jiang [email protected] [email protected] Submission Slide 3 Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Authors (continued) Name Affiliation Address Phone Hongyuan Zhang Email [email protected] Lei Wang [email protected] Liwen Chu [email protected] Jinjing Jiang [email protected] Yan Zhang [email protected] Rui Cao [email protected] Sudhir Srinivasa Marvell Bo Yu 5488 Marvell Lane, Santa Clara, CA, 95054 Saga Tamhane [email protected] 408-222-2500 [email protected] [email protected] Mao Yu [email protected] Xiayu Zheng [email protected] Christian Berger [email protected] Niranjan Grandhe [email protected] Hui-Ling Lou Submission [email protected] Slide 4 Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Authors (continued) Name Affiliation Jianhan Liu Address Phone Email 2860 Junction Ave, San Jose, CA 95134, USA +1-408-526-1899 [email protected] Thomas Pare ChaoChun Wang James Wang [email protected] [email protected] om Mediatek USA [email protected] Tianyu Wu [email protected] Russell Huang [email protected] m James Yee Mediatek No. 1 Dusing 1st Road, Hsinchu, Taiwan +886-3-567-0766 [email protected] Frank Hsu [email protected] Joonsuk Kim [email protected] [email protected] Aon Mujtaba Guoqing Li [email protected] Apple Eric Wong [email protected] Chris Hartman [email protected] Jarkko Kneckt [email protected] Submission Slide 5 May 2016 doc.: IEEE 802.11-16/0619r0 Authors(continued) Name Affiliation David X. Yang Jiayin Zhang Jun Luo Yi Luo Yingpei Lin Jiyong Pang Zhigang Rong Jian Yu Ming Gan Yuchen Guo Yunsong Yang Junghoon Suh Address F1-17, Huawei Base, Bantian, Shenzhen 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai F1-17, Huawei Base, Bantian, Shenzhen 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai 10180 Telesis Court, Suite 365, San Diego, CA 92121 NA F1-17, Huawei Base, Bantian, Shenzhen Huawei F1-17, Huawei Base, Bantian, Shenzhen F1-17, Huawei Base, Bantian, Shenzhen 10180 Telesis Court, Suite 365, San Diego, CA 92121 NA 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada Peter Loc Edward Au Teyan Chen Yunbo Li Submission Phone Email [email protected] +86-18601656691 [email protected] [email protected] +86-18665891036 [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada F1-17, Huawei Base, Bantian, Shenzhen F1-17, Huawei Base, Bantian, Shenzhen Slide 6 [email protected] [email protected] [email protected] Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Authors (continued) Name Affiliation Address Phone Email Jinmin Kim [email protected] Kiseon Ryu [email protected] Jinyoung Chun [email protected] Jinsoo Choi [email protected] Jeongki Kim LG Electronics Dongguk Lim 19, Yangjae-daero 11gil, Seocho-gu, Seoul 137130, Korea [email protected] [email protected] Suhwook Kim [email protected] Eunsung Park [email protected] Jayh hyunhee Park [email protected] HanGyu Cho [email protected] #9 Wuxingduan, Xifeng Rd., Xi'an, China Bo Sun Kaiying Lv Yonggang Fang [email protected] [email protected] ZTE Ke Yao Weimin Xing Brian Hart Pooya Monajemi Submission [email protected] [email protected] [email protected] Cisco Systems 170 W Tasman Dr, San Jose, CA 95134 Slide 7 [email protected] [email protected] Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Authors (continued) Name Affiliation Address Phone Email Samsung Innovation Park, Cambridge CB4 0DS (U.K.) Maetan 3-dong; Yongtong-Gu Suwon; South Korea 1301, E. Lookout Dr, Richardson TX 75070 Innovation Park, Cambridge CB4 0DS (U.K.) 1301, E. Lookout Dr, Richardson TX 75070 Maetan 3-dong; Yongtong-Gu Suwon; South Korea +44 1223 434633 [email protected] +82-31-279-9028 [email protected] (972) 761 7437 [email protected] +44 1223 434600 [email protected] (972) 761 7470 [email protected] +82-10-8864-1751 [email protected] Yasushi Takatori +81 46 859 3135 [email protected] Yasuhiko Inoue +81 46 859 5097 [email protected] +81 46 859 5107 [email protected] +81 46 859 3494 [email protected] Koichi Ishihara +81 46 859 4233 [email protected] Junichi Iwatani +81 46 859 4222 [email protected] +81 46 840 3759 [email protected] Fei Tong Hyunjeong Kang Kaushik Josiam Mark Rison Rakesh Taori Sanghyun Chang Shoko Shinohara NTT Yusuke Asai Akira Yamada Submission NTT DOCOMO 1-1 Hikari-no-oka, Yokosuka, Kanagawa 239-0847 Japan 3-6, Hikarinooka, Yokosukashi, Kanagawa, 239-8536, Japan Slide 8 Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Authors (continued) Name Affiliation Address Phone Email Masahito Mori [email protected] Yusuke Tanaka [email protected] Yuichi Morioka Sony Corp. [email protected] Kazuyuki Sakoda [email protected] William Carney [email protected] Sigurd Schelstraete [email protected] Quantenna Huizhao Wang [email protected] Minho Cheong [email protected] Reza Hedayat [email protected] Young Hoon Kwon Newracom Yongho Seok 9008 Research Dr. Irvine, CA 92618 [email protected] m [email protected] Daewon Lee [email protected] Yujin Noh [email protected] Submission Slide 9 Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Authors (continued) Name Affiliations Narendar Madhavan Masahiro Sekiya Toshihisa Nabetani Tsuguhide Aoki Tomoko Adachi Kentaro Taniguchi Daisuke Taki Koji Horisaki Toshiba Address Phone email [email protected] David Halls Filippo Tosato Zubeir Bocus Fengming Cao Submission Slide 10 Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Introduction • HE SIG-B can have very large PAPR when one OFDM symbol has all (or almost all) zeros or ones – Several examples are provided in the following slides. • In this presentation we investigate two schemes for HE SIG-B PAPR reduction Submission Slide 11 Bin Tian, Qualcomm doc.: IEEE 802.11-16/0619r0 Example 1: All Zero Padding Bits Non-padding SIGB symbols SIG-B Channel 1 Common bits SIG-B Channel 2 Common bits Submission Zero Padding symbols STA specific information subfields/CRC/Tail STA specific information subfields/CRC/Tail … … Zero Padding Zero Padding May 2016 doc.: IEEE 802.11-16/0619r0 Example 2: Long Sequence of Zeros in HESIGB Content Common bits CRC (4) Tail (6) 2 STA info (21) + CRC (4) + Tail (6) … 2 STA info (21) + CRC (4) + Tail (6) Padding SIGB symbol (26 bits) 000000 STAID 6 11 MCS Nss 4 3 00000000011 1000 000 1 0 1 STAID MCS Nss 11 4 Coding DCM BF Tail 0 0 0 Coding DCM BF 36 zeros in a row 00000000000 0000 000 1 1 1 Broadcast Frame Broadcast Frame 1 1 1 4 Unicast Frame Unicast Frame Bits Bits STA ID = 0 00000000000 STA ID = 3 00000000011 MCS = 0 (BPSK ½) 0000 MCS = 8 (BPSK ½) 1000 NSS = 1 000 NSS = 1 000 BF = 0 (no BF, broadcast) 0 BF = 1 (BFed) 1 DCM = 0 0 DCM = 0 0 Coding = 0 (BCC) 0 Coding = 1 (LDPC) 1 Submission 3 CRC Slide 13 Note: Cases with a lot of sequential zeros can happen even if the bit ordering of the field are shuffled. Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Solutions 1: Scrambler • Reuse the 11a scrambler on HE SIG-B content – Fixed scrambling seed preferred. No additional seed signaling required • Seed may not be optimal for certain content – Implementation drawback: need to skip scrambling tail bits in each common/per user code block • Use random padding bits – Assume scrambler doesn’t cover the padding bit Submission Slide 14 Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Solutions 2: Phase Rotation • Phase rotation is proposed in [1] to mitigate the PAPR issue for DCM MCS0 – Same approach can be reused to solve PAPR issue for other modulations • Phase rotation on data tones after constellation mapping – In each 20MHz HE-SIGA/B, there are 52 data tones. For the kth data tone, phase rotation pattern is defined as in [1] 1 (-1)k for 0=<k<26 for 26=<k<52 – For DCM + MCS0, since the same rotation is applied in the DCM BPSK bit mapping, this step of phase rotation after constellation mapping can be skipped – Legacy gamma rotation still applies among different 20MHz channels Submission Slide 15 Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Simulation • High PAPR configuration identified is simulated • PAPR results of following cases are compared – – – – – Submission Data HE-SIGB: without PAPR mitigation HE-SIGB +11a scrambler with random seed HE-SIGB +11a scrambler with fixed seed (0x01) HE-SIGB with phase rotation Slide 16 Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Simulation Results – MCS0 7 STAs SIGB MCS0 with 3 bit zero padding (8 symbols in 20MHz), no scrambling on tail and padding bits 1 MCS0 SIGB w/o PAPR reduction 11a scrambling w/nonzero random seed MCS0 data phase rotation 11a scrambling w/ fixed seed 0.9 0.8 0.7 F(x) 0.6 0.5 0.4 0.3 0.2 0.1 0 2 4 6 8 PAPR in dB 10 12 14 • Both scrambler and phase rotation method can effectively reduce the PAPR Submission Slide 17 Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Simulation Results – MCS5 7 STAs SIGB MCS5 with 3 bit zero padding (1 symbol in 20MHz), no scrambling on tail and padding bits 1 MCS5 SIGB w/o PAPR reduction 11a scrambling w/ nonzero random seed MCS5 data phase rotation 11a scrambling with fixed seed 0.9 0.8 0.7 F(x) 0.6 0.5 0.4 0.3 0.2 0.1 0 4 5 6 7 8 PAPR in dB 9 10 11 12 • Both scrambler and phase rotation method can effectively reduce the PAPR Submission Slide 18 Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Summary • Two schemes are proposed for PAPR reduction on HE SIG-B – 11a scrambler based approach – Phase rotation • Simulations show that both schemes are effective • Prefer the phase rotation approach due to its simplicity in implementation Submission Slide 19 Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Straw Poll 1 • Do you support the following PAPR reduction scheme for HE SIG-B – Phase rotation is applied to the HE SIG-B data tones after constellation mapping. For the kth data tone in the HE SIG-B, the phase rotation pattern is defined as 1 for 0=<k<26 and (-1)k for 26=<k<52 – For DCM + MCS0, since the same rotation has already been applied in the DCM BPSK bit mapping, this step of phase rotation after constellation mapping shall be skipped – Legacy gamma rotation still applies among different 20MHz channels Submission Slide 20 Bin Tian, Qualcomm May 2016 doc.: IEEE 802.11-16/0619r0 Reference [1] IEEE 802.11-16/0xxxr0 On Modulation of MCS0 DCM and DCM Capability Submission Slide 21 Bin Tian, Qualcomm