Phase Rotation for 320 MHz Non-HT

Phase Rotation for 320 MHz Non-HT
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In this set of homework assignments for CS 270, various topics such as Perceptron, Error Values, Quadric Machine, Linear Regression, and Backpropagation Learning are covered. Each assignment presents different scenarios and tasks related to machine learning concepts. Students are required to submit neatly written or scanned solutions as PDF or JPEG files through Learning Suite to demonstrate their understanding of the material.

  • Machine Learning
  • CS 270
  • Homework Solutions
  • Perceptron
  • Backpropagation Learning
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  1. Jan 2021 doc.: IEEE 802.11-21/0129r0 Phase Rotation for 320 MHz Non-HT Duplicate Transmission and Pre-EHT modulated Fields Date: 2021-01-04 Authors: Name Affiliation Address Phone Email Chenchen Liu liuchenchen1@huawei.com Huawei Technologies Co., Ltd Huawei Technologies Co., Ltd Bo Gong Huawei Base, Bantian, Shenzhen Ming Gan Jian Yu Chenchen LIU et al., Huawei Submission Slide 1

  2. Jan 2021 doc.: IEEE 802.11-21/0129r0 Abstract In this contribution, we will discuss the phase rotation for 320 MHz Non-HT duplicate transmission and pre-EHT modulated fields. Chenchen LIU et al., Huawei Submission Slide 2

  3. Jan 2021 doc.: IEEE 802.11-21/0129r0 Outline Background Rotation coefficients for 320 MHz Non-HT Simulation Results Rotation coefficients for 320 MHz Pre-EHT modulated fields Summary References Chenchen LIU et al., Huawei Submission Slide 3

  4. Jan 2021 doc.: IEEE 802.11-21/0129r0 Backgrounds Non-HT duplicate transmission is used to transmit to STAs that may be present in a part of a 40 MHz, 80 MHz, 160 MHz , or 320 MHz channel For examples, a lot of control frame such as RTS, CTS and NDPA will be transmitted in non-HT duplicate form With Non-HT duplicate transmission, the message is encoded and modulated according to 11a 20 MHz bandwidth, and then duplicated for every 20 MHz sub channel with a phase rotation to reduce the PAPR. The supported modulation includes BPSK, QPSK, 16QAM, 64QAM and the supported coding rate 1/2,3/4. Chenchen LIU et al., Huawei Submission Slide 4

  5. Jan 2021 doc.: IEEE 802.11-21/0129r0 Backgrounds 3.2 s OFDM symbol prepended by a 0.8 s cyclic prefix is used for Non-HT duplicate transmission. Numbering the subcarrier locations ranging from 32, 31,. . ., 1, 0, 1,. . ., 31, the populated subcarriers are located at 26, 25,. . ., 2, 1, 1, 2,. . ., 25, 26 for each 20M sub channel The coded bits are modulated on to 48 subcarriers. Four additional subcarriers are used as pilots for phase and frequency tracking and training. The pilot subcarriers are 21, 7, 7, 21. Pre-EHT modulated fields shall be transmitted in the same way as in the Non-HT duplicate transmission, with the following exceptions: The Rate and Length fields The four additional subcarriers at indices 27 and 28 Chenchen LIU et al., Huawei Submission Slide 5

  6. Jan 2021 doc.: IEEE 802.11-21/0129r0 Backgrounds The following motion has already passed 802.11be supports the following phase rotation sequence for legacy preamble, RL-SIG, U-SIG and EHT-SIG in 320/160+160 MHz PPDU: [1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 -1 1 1 1] [Motion 115, #SP81, [16] and [70]] We tested the PAPR performance of this sequence for 320 MHz Non- HT duplicate transmission. Chenchen LIU et al., Huawei Submission Slide 6

  7. Jan 2021 doc.: IEEE 802.11-21/0129r0 Rotation coefficients for 320 MHz Non-HT Option 1(per 80 MHz Rotation): [1 -1 -1 -1, 1 -1 -1 -1, -1 1 1 1, -1 1 1 1] [Motion 115, #SP81, [16] and [70]] Option 2(per 20 MHz Rotation): [1, 1, 1, 1, 1, -1, 1, 1, -1, -1, -1, 1, 1, -1, 1, -1] Option 3(per 80 MHz Rotation): [1, -1, -1, -1, 1, -1, -1, -1, 1, -1, -1, -1, -1, 1, 1, 1] Chenchen LIU et al., Huawei Submission Slide 7

  8. Jan 2021 doc.: IEEE 802.11-21/0129r0 Simulation Results PAPR for 320 MHz Non-HT duplicate transmission without preamble puncture(BPSK, 16QAM respectively) CDF(16QAM) Chenchen LIU et al., Huawei Submission Slide 8

  9. Jan 2021 doc.: IEEE 802.11-21/0129r0 Simulation Results Worst PAPR for 320 MHz Non-HT duplicate transmission with 20 MHz preamble puncture(BPSK, 16QAM respectively) CDF(16QAM with 20M puncture) Chenchen LIU et al., Huawei Submission Slide 9

  10. Jan 2021 doc.: IEEE 802.11-21/0129r0 Simulation Results Worst PAPR for 320 MHz Non-HT duplicate transmission with 40 MHz preamble puncture (RU3*996+RU484) Chenchen LIU et al., Huawei Submission Slide 10

  11. Jan 2021 doc.: IEEE 802.11-21/0129r0 Simulation Results Worst PAPR for 320 MHz Non-HT duplicate transmission with 80 MHz preamble puncture (RU3*996) Chenchen LIU et al., Huawei Submission Slide 11

  12. Jan 2021 doc.: IEEE 802.11-21/0129r0 Simulation Results Worst PAPR for 320 MHz Non-HT duplicate transmission with 120 MHz preamble puncture (RU2*996+RU484) CDF(BPSK with 120M puncture) Chenchen LIU et al., Huawei Submission Slide 12

  13. Jan 2021 doc.: IEEE 802.11-21/0129r0 Simulation Results Worst PAPR for 320 MHz Non-HT duplicate transmission among all puncture pattern (1 RU4*996, 16 RU3*996+RU484+RU242, 8 RU3*996+RU484, 2 RU3*996, 12 RU2*996+RU484) Chenchen LIU et al., Huawei Submission Slide 13

  14. Jan 2021 doc.: IEEE 802.11-21/0129r0 Simulation Results Worst PAPR for 320 MHz Non-HT duplicate transmission among all puncture pattern (1 RU4*996, 8 RU3*996+RU484, 2 RU3*996, 12 RU2*996+RU484) Chenchen LIU et al., Huawei Submission Slide 14

  15. Jan 2021 doc.: IEEE 802.11-21/0129r0 Simulation Results Considering implementation with two 160M capable RF worst PAPR for 320 MHz Non-HT duplicate transmission among all puncture pattern the Chenchen LIU et al., Huawei Submission Slide 15

  16. Jan 2021 Rotation coefficients for 320M Pre-EHT modulated fields doc.: IEEE 802.11-21/0129r0 Variable durations per EHT-LTF symbol 4 s per symbol 4 s 8 s 4 s 4 s 8 s 8 s ... EHT- STF L-STF L-LTF L-SIG RL-SIG U-SIG EHT-SIG EHT-LTF EHT-LTF Data PE The L-SIG and RL-SIG is transmitted in the same way as in the Non-HT duplicate transmission, with the following exceptions For L-SIG and RL-SIG, values [ 1, 1, 1, 1] are mapped to the extra subcarriers [ 28, 27, 27, 28] LENGTH field in L-SIG set to a value N such that mod(N, 3) = 0 Rate=1101 Chenchen LIU et al., Huawei Submission Slide 16

  17. Jan 2021 Rotation coefficients for 320M Pre-EHT modulated fields doc.: IEEE 802.11-21/0129r0 PAPR for L-SIG and RL-SIG in 320M without preamble puncture Chenchen LIU et al., Huawei Submission Slide 17

  18. Jan 2021 Rotation coefficients for 320M Pre-EHT modulated fields doc.: IEEE 802.11-21/0129r0 Worst PAPR for L-SIG and RL-SIG in 320M with 20M and 40M preamble puncture CDF(20M puncture) CDF(20M puncture) Chenchen LIU et al., Huawei Submission Slide 18

  19. Jan 2021 Rotation coefficients for 320M Pre-EHT modulated fields doc.: IEEE 802.11-21/0129r0 Worst PAPR for L-SIG and RL-SIG in 320M with 80M and 120M preamble puncture Chenchen LIU et al., Huawei Submission Slide 19

  20. Jan 2021 Rotation coefficients for 320M Pre-EHT modulated fields doc.: IEEE 802.11-21/0129r0 Worst PAPR for L-SIG and RL-SIG in 320M among all puncture pattern(1 RU4*996, 16 RU3*996+RU484+RU242, 8 RU3*996+RU484, 2 RU3*996, 12 RU2*996+RU484) Chenchen LIU et al., Huawei Submission Slide 20

  21. Jan 2021 Rotation coefficients for 320M Pre-EHT modulated fields doc.: IEEE 802.11-21/0129r0 Considering implementation with two 160M capable RF the worst PAPR for L-SIG and RL-SIG in 320M among all puncture pattern Chenchen LIU et al., Huawei Submission Slide 21

  22. Jan 2021 doc.: IEEE 802.11-21/0129r0 Summary In this contribution, three sets of rotation coefficients are evaluated for Non-HT duplicate transmission and pre-EHT modulated filed under various preamble puncture pattern. The overall results shows that The per 80M rotation(Option3) has about 1dB PAPR gain compared to(Option1) in the sense of median PAPR of the worst case among all puncture pattern Chenchen LIU et al., Huawei Submission Slide 22

  23. Jan 2021 doc.: IEEE 802.11-21/0129r0 References [1] IEEE P802.11-REVmd /D3.0 [2] IEEE P802.11ax /D6.0 [3] Phase Rotation Proposal Follow-up, doc.: IEEE 802.11-20/0699r1 [4] Specification Framework for TGbe , doc.: IEEE 802.11-20/0566r23 Chenchen LIU et al., Huawei Submission Slide 23

  24. Jan 2021 doc.: IEEE 802.11-21/0129r0 SP1 Do you support to apply the following phase rotation for 320M Non-HT Duplicate transmission [1, -1, -1, -1, 1, -1, -1, -1, 1, -1, -1, -1, -1, 1, 1, 1](Option 3, per 80M) Y/N/Abs Chenchen LIU et al., Huawei Submission Slide 24

  25. Jan 2021 doc.: IEEE 802.11-21/0129r0 SP2 Do you support to apply the following phase rotation for legacy preamble, U-SIG and EHT-SIG of 320M Pre-EHT modulated fields [1, -1, -1, -1, 1, -1, -1, -1, 1, -1, -1, -1, -1, 1, 1, 1](Option 3, per 80M) Y/N/Abs Chenchen LIU et al., Huawei Submission Slide 25

  26. Jan 2021 doc.: IEEE 802.11-21/0129r0 SP3 Do you support to apply the following phase rotation for 320M Non-HT Duplicate transmission when implemented with one singular 320M capable RF [1, -1, -1, -1, 1, -1, -1, -1, 1, -1, -1, -1, -1, 1, 1, 1](Option 3, per 80M) Y/N/Abs Chenchen LIU et al., Huawei Submission Slide 26

  27. Jan 2021 doc.: IEEE 802.11-21/0129r0 SP4 Do you support to apply the following phase rotation for legacy preamble, U-SIG and EHT-SIG of 320M Pre-EHT modulated fields when implemented with one singular 320M capable RF [1, -1, -1, -1, 1, -1, -1, -1, 1, -1, -1, -1, -1, 1, 1, 1](Option 3, per 80M) Y/N/Abs Chenchen LIU et al., Huawei Submission Slide 27

  28. Jan 2021 doc.: IEEE 802.11-21/0129r0 Backup Worst PAPR of L-LTF Option1 Option2 Option3 No Puncture 20MHz Puncture 40MHz Puncture 80MHz Puncture 120MHz Puncture 8.4095 5.7493 6.8632 9.5729 7.4922 8.3940 9.0694 7.4206 8.6056 7.2900 8.2589 7.9370 8.2592 9.5062 8.7288 Worst PAPR of L-STF Option1 Option2 Option3 No Puncture 20MHz Puncture 40MHz Puncture 80MHz Puncture 120MHz Puncture 7.7653 4.7322 6.2190 8.9287 6.4751 7.7498 8.4251 6.3556 7.5901 6.5568 7.2417 7.3156 7.5260 8.4890 7.6524 Chenchen LIU et al., Huawei Submission Slide 28

  29. Jan 2021 doc.: IEEE 802.11-21/0129r0 Backup Worst PAPR for 320 MHz Non-HT duplicate transmission among all puncture pattern (1 RU4*996, 8 RU3*996+RU484, 2 RU3*996, 12 RU2*996+RU484) Chenchen LIU et al., Huawei Submission Slide 29

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