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19, Yangjae-daero 11gil, Seocho-gu, Seoul , Korea

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Presentation on theme: "19, Yangjae-daero 11gil, Seocho-gu, Seoul , Korea"— Presentation transcript:

1 19, Yangjae-daero 11gil, Seocho-gu, Seoul 137-130, Korea
Month Year doc.: IEEE yy/xxxxr0 September 2015 1024 QAM Proposal 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
September 2015 Authors (continued) Name Affiliation Address Phone Ron Porat Broadcom Sriram Venkateswaran Matthew Fischer Leo Montreuil Andrew Blanksby Vinko Erceg Robert Stacey Intel 2111 NE 25th Ave, Hillsboro OR 97124, USA      Eldad Perahia Shahrnaz Azizi Po-Kai Huang Qinghua Li Xiaogang Chen Chitto Ghosh Laurent cariou Rongzhen Yang Assaf Gurevitz Eunsung Park, LG Electronics

3 5488 Marvell Lane, Santa Clara, CA, 95054
September 2015 Authors (continued) 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 Jie Huang Sudhir Srinivasa Saga Tamhane Mao Yu Edward Au Hui-Ling Lou Eunsung Park, LG Electronics

4 Authors (continued) September 2015 Albert Van Zelst Qualcomm
Name Affiliation Address Phone Albert Van Zelst Qualcomm Straatweg 66-S Breukelen, 3621 BR Netherlands Alfred Asterjadhi 5775 Morehouse Dr. San Diego, CA, USA Bin Tian Carlos Aldana 1700 Technology Drive San Jose, CA 95110, USA George Cherian Gwendolyn Barriac Hemanth Sampath Menzo Wentink Richard Van Nee Rolf De Vegt Sameer Vermani Simone Merlin Tevfik Yucek   VK Jones Youhan Kim Eunsung Park, LG Electronics

5 Authors (continued) September 2015 James Yee Mediatek
Name Affiliation Address Phone James Yee Mediatek No. 1 Dusing 1st Road, Hsinchu, Taiwan   Alan Jauh Chingwa Hu Frank Hsu Thomas Pare USA 2860 Junction Ave, San Jose, CA 95134, USA ChaoChun Wang James Wang Jianhan Liu Tianyu Wu Russell Huang Joonsuk Kim Apple Aon Mujtaba   Guoqing Li Eric Wong Chris Hartman Eunsung Park, LG Electronics

6 Authors (continued) September 2015 Phillip Barber Huawei Peter Loc
Name Affiliation Address Phone Phillip Barber Huawei The Lone Star State, TX Peter Loc Le Liu F1-17, Huawei Base, Bantian, Shenzhen Jun Luo 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai Yi Luo Yingpei Lin Jiyong Pang Zhigang Rong 10180 Telesis Court, Suite 365, San Diego, CA  NA Rob Sun 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada David X. Yang Yunsong Yang Zhou Lan F1-17, Huawei Base, Bantian, SHenzhen Junghoon Suh Jiayin Zhang Eunsung Park, LG Electronics

7 Authors (continued) September 2015 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 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

8 #9 Wuxingduan, Xifeng Rd., Xi'an, China
September 2015 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

9 Introduction This contribution proposes to use 1024 QAM in 11ax
September 2015 Introduction This contribution proposes to use 1024 QAM in 11ax First part talks about the importance of peak throughput enhancement of 11ax for marketing point of view Second part provides system level simulations to show average throughput enhancement by 1024QAM Finally, we discuss feasibility of 1024QAM and propose to use it optionally in 11ax Eunsung Park, LG Electronics

10 How to appeal 11ax in the market?
September 2015 How to appeal 11ax in the market? We hope 11ax becomes a big success in market But, ‘average throughput enhancement of 4X’ may not be so appealing to market even if it is very important technically. 1024 QAM provides a good marketing point on 11ax based on the followings: WLAN finally achieves 10Gbps (Multi-gigabit)! New frame structure provides around 15% enhancement of peak throughput (4X FFT with 0.4us CP, More guard/pilot tones used as data) 1024 QAM provides additional 25% gain, which results in overall 44% gain (6.933Gbps * 1.44 = 9.98Gbps!) The first wireless technology to use 1K QAM1) Keep superior to other standards in terms of modulation technology (LTE decided to use 256QAM) Eunsung Park, LG Electronics

11 How to meet the technical target of 11ax?
September 2015 How to meet the technical target of 11ax? Based on our system-level simulation, we have the following observations. Simulation parameters are described in Appendix A Observation 1. In most indoor scenarios, 1024 QAM MCS levels are selected with very high probability (see page 5) We additionally used MCS 10 (1024QAM with 3/4 code rate) and MCS 11 ( 1024QAM with 5/6 code rate) Observation QAM provides average throughput gain over 20% in most indoor scenarios (see page 6) Eunsung Park, LG Electronics

12 MCS Selection Probability with 1024QAM
September 2015 MCS Selection Probability with 1024QAM We simulated SISO, space time block code (STBC), and spatial multiplexing (SM) in each simulation scenario [2] Residential Enterprise Indoor hotspot Outdoor SISO STBC SM Eunsung Park, LG Electronics

13 Average Throughput Gain with 1024QAM
September 2015 Average Throughput Gain with 1024QAM Average Throughput Gain by including 1024 QAM [Unit : %] Residential Enterprise Indoor hotspot Outdoor DL UL SISO 22 18 25 21 20 11 1 STBC 24 12 2 SM 13 14 3 5 Eunsung Park, LG Electronics

14 Discussion on Feasibility (1/2)
September 2015 Discussion on Feasibility (1/2) For 1024 QAM application, we need to discuss several issues such as Required minimum EVM Non-linearity of power amplifier (PA) Quantization error of analog-to-digital converter (ADC) Phase noise and I/Q imbalance of local oscillator (LO) Residual CFO effect Constellation design, interleaver design, etc Eunsung Park, LG Electronics

15 Discussion on Feasibility (2/2)
September 2015 Discussion on Feasibility (2/2) EVM of -35dBc or even -34dBc give reasonable performance (See Appendix B) Note that even in ac MU-MIMO the AP already has to improve its Tx EVM level to about -38dBc, so 1024 QAM should not impose a real new requirement Assuming future modems will include sophisticated algorithms that will combat Tx EVM sources (phase noise, PA nonlinearities, IQ imbalance), the Tx EVM requirement can be further relieved Current ADC technology seems to make 1024 QAM feasible ADC needs 12 bits for quantization at least when using 1024 QAM and it is already possible to implement CFO may not cause any problem with a proper pilot design Although a high modulation level such as 1024 QAM is vulnerable to CFO, properly designed pilot can reliably estimate and compensate residual CFO Eunsung Park, LG Electronics

16 September 2015 Conclusion We have showed that using 1024 QAM in 11ax can be appeal to the market and also help to guarantee the technical target of 11ax by providing peak data rate increase and average throughput enhancement Also, we have checked the feasibility of 1024 QAM and the current technology seems feasible Thus, we propose to use 1024 QAM in 11ax Eunsung Park, LG Electronics

17 September 2015 Straw poll 1 Do you agree to use 1024 QAM as an optional feature for SU and MU using the resource units equal to or larger than 242 tones in 11ax? Y/N/A Eunsung Park, LG Electronics

18 September 2015 References [1] IEEE /0624r0 - Investigation on 1024QAM Feasibility in 11ax [2] IEEE /0980r12 - Simulation Scenarios Eunsung Park, LG Electronics

19 September 2015 Appendices Eunsung Park, LG Electronics

20 A. Simulation Parameters
September 2015 A. Simulation Parameters Simulation scenario Scenario1 Scenario2 Scenario3 Scenario4 AP/STA power [dBm] 23 / 17 24 / 21 17 / 15 30 / 15 # of users per BSS 5 32 30 50 Run time Initial: 10s, simulation: 10s, drop: 5 BW 40MHz (128 FFT) Data size 1ms TXOP less fixed overhead (RTS/CTS off) Normal overhead: SIFS + ACK + 2*PLCP header GI Long (0.8 us) # of AP/STA antennas Rank1: SISO(1,1)/Alamouti(2,2), Rank2: SM(2,2) (interference model: AWGN) Max # of retries Scenario1: 4, other scenarios: 10 DL & UL traffic Full buffer (DL & UL ratio: based on PHY system simulation in [2]) CCA level Preamble detection: -82dBm (both AP and STA) Energy detection: -62dBm (both AP and STA) Channel Time-varying Target PER 0.1 PHY abstraction Capacity based method MCS selection Genie method Eunsung Park, LG Electronics

21 B. Effect of TX EVM on RX performance
September 2015 B. Effect of TX EVM on RX performance 4 Tx 2 Rx MIMO 2 streams, 1024 QAM rate 5/6, no channel estimation loss, beamforming SVD, ZF equalizer Tx EVM level (dBc) D channel low corr (SNR) D channel high corr (SNR) No Tx EVM 31.2 35. 9 -38 31.6 36.1 -35 32.1 (0.9 dB loss) 36.6 (0.7 dB loss) -34 32.4 37 -32 34 40 Eunsung Park, LG Electronics

22 C. Link Curve MCS 11 requires about 32dB SNR for PER of 10%.
September 2015 C. Link Curve MCS 11 requires about 32dB SNR for PER of 10%. No CFO, no TO channel estimation w/ LS Eunsung Park, LG Electronics

23 September 2015 Back up Eunsung Park, LG Electronics

24 Simulation Results Channel D, corr=0.7, 4 Tx antennas, 2 Rx antennas
September 2015 Simulation Results Channel D, corr=0.7, 4 Tx antennas, 2 Rx antennas Eunsung Park, LG Electronics

25 Simulation Results Channel D, corr=0.7, 4 Tx antennas, 2 Rx antennas
September 2015 Simulation Results Channel D, corr=0.7, 4 Tx antennas, 2 Rx antennas EVM = 35 (1024 QAM), 32 (256 QAM) Eunsung Park, LG Electronics

26 Simulation Results Channel D, corr=0.3, 4 Tx antennas, 2 Rx antennas
September 2015 Simulation Results Channel D, corr=0.3, 4 Tx antennas, 2 Rx antennas Eunsung Park, LG Electronics

27 Simulation Results Channel D, corr=0.3, 4 Tx antennas, 2 Rx antennas
September 2015 Simulation Results Channel D, corr=0.3, 4 Tx antennas, 2 Rx antennas EVM = 35 (1024 QAM), 32 (256 QAM) Eunsung Park, LG Electronics

28 Simulation Results Channel D, corr=0.7, 3 Tx antennas, 2 Rx antennas
September 2015 Simulation Results Channel D, corr=0.7, 3 Tx antennas, 2 Rx antennas Eunsung Park, LG Electronics

29 Simulation Results Channel D, corr=0.7, 3 Tx antennas, 2 Rx antennas
September 2015 Simulation Results Channel D, corr=0.7, 3 Tx antennas, 2 Rx antennas EVM = 35 (1024 QAM), 32 (256 QAM) Eunsung Park, LG Electronics

30 Simulation Results Channel D, corr=0.3, 3 Tx antennas, 2 Rx antennas
September 2015 Simulation Results Channel D, corr=0.3, 3 Tx antennas, 2 Rx antennas Eunsung Park, LG Electronics

31 Simulation Results Channel D, corr=0.3, 3 Tx antennas, 2 Rx antennas
September 2015 Simulation Results Channel D, corr=0.3, 3 Tx antennas, 2 Rx antennas EVM = 35 (1024 QAM), 32 (256 QAM) Eunsung Park, LG Electronics

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