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HE-STF Sequences for 160/80+80MHz

HE-STF Sequences for 160/80+80MHz. Date: 2016-03-14. Authors:. Authors (continued). Authors (continued). Authors (continued). Authors (continued). Authors (continued). Authors (continued). Authors (continued). Authors (continued). Authors (continued). Authors (continued).

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HE-STF Sequences for 160/80+80MHz

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  1. HE-STF Sequences for 160/80+80MHz Date: 2016-03-14 Authors: Eunsung Park, LG Electronics

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  12. Introduction • 1x/2x HE-STF sequences have been agreed for 20/40/80MHz [1] • In this contribution, we propose 1x/2x HE-STF sequences for 160/80+80MHz based on the agreed 1x/2x HE-STF sequences for 80MHz, respectively • The agreed HE-STF sequences for 80MHz are just used for the primary 80MHz HE-STF sequences • To determine the secondary 80MHz HE-STF sequences, we simply apply the optimized phase rotation to each 20MHz sub-band of the primary 80MHz HE-STF sequences • The phase rotation values are optimized in terms of the PAPR • For the 1x HE-STF, we only consider the entire band (160/80+80MHz) PAPR • For the 2x HE-STF, we consider PAPR of all of the RUs as well as the entire band PAPR Eunsung Park, LG Electronics

  13. Proposal – 1x HE-STF • 1x HE-STF160MHz(-1008:16:1008) = [M, 1, -M, 0, -M, 1, -M, 0, -1*[M, 1, -M], 0, -M, 1, -M] *(1+j)/sqrt(2) • M = {-1 -1 -1 +1 +1 +1 -1 +1 +1 +1 -1 +1 +1 -1 +1} • 1x HE-STF80+80MHz = [1x HE-STF80MHz,Prime, 1x HE-STF80MHz,Second] • We choose phase rotation values which minimize the maximum PAPR among all of the 160/80+80 MHz cases 1x HE-STF80MHz,Prime  agreed 80MHz 1x HE-STF sequence [1] 1x HE-STF80MHz,Second  Phase rotation of 180° is applied to the first 40MHz sub-band of the agreed 80MHz 1x HE-STF sequence [1] Eunsung Park, LG Electronics

  14. Proposal – 2x HE-STF • 2x HE-STF160MHz(-1016:8:1016) = [M, -1, M, -1, -M, -1, M, 0, -M, 1, M, 1, -M, 1, -M, 0, -1*[M, -1, M, -1, -M, -1, M], 0, -M, 1, M, 1, -M, 1, -M] *(1+j)/sqrt(2) • 2x HE-STF160MHz(±1016) = 0 • 2x HE-STF160MHz(±8) = 0 • 2x HE-STF80+80MHz = [2x HE-STF80MHz,Prime, 2x HE-STF80MHz,Second] • We choose phase rotation values which minimize the maximum PAPR among all of the RUs and 160/80+80 MHz cases 2x HE-STF80MHz,Prime  agreed 80MHz 2x HE-STF sequence [1] 2x HE-STF80MHz,Second  Phase rotation of 180° is applied to the first 40MHz sub-band of the agreed 80MHz 2x HE-STF sequence [1] Eunsung Park, LG Electronics

  15. PAPR – 1x HE-STF • 1x HE-STF for the entire band • 160MHz PAPR : 5.93/5.05 (dup.(1)/proposed) • 80+80MHz PAPR (1) Duplicated sequence, i.e., the secondary 80MHz sequence is equal to the primary 80MHz sequence Eunsung Park, LG Electronics

  16. PAPR – 2x HE-STF (1/2) • 2x HE-STF for all RUs Prime[dB] / Second[dB] Eunsung Park, LG Electronics

  17. PAPR – 2x HE-STF(2/2) • 2x HE-STF for the entire band • 160MHz PAPR : 7.87/6.34 (dup.(1)/proposed) • 80+80MHz PAPR (1) Duplicated sequence, i.e., the secondary 80MHz sequence is equal to the primary 80MHz sequence Eunsung Park, LG Electronics

  18. Conclusion • We proposed 1x/2x HE-STF sequences for 160/80+80MHz • The secondary 80MHz HE-STF sequences are designed by applying phase rotation of 180° to the first 40MHz sub-band of the primary 80MHz HE-STF sequences • Compared to the duplicated sequences, the proposed sequences have quite low PAPR Eunsung Park, LG Electronics

  19. Straw poll #1 • Do you agree to add the following 1x/2x HE-STF sequences for 160/80+80MHz to the 11ax SFD? • 1x HE-STF160MHz(-1008:16:1008) = [M, 1, -M, 0, -M, 1, -M, 0, -M, -1, M, 0, -M, 1, -M] *(1+j)/sqrt(2) • M = {-1 -1 -1 +1 +1 +1 -1 +1 +1 +1 -1 +1 +1 -1 +1} • 1x HE-STF80+80MHz = [1x HE-STF80MHz,Prime, 1x HE-STF80MHz,Second] • 1x HE-STF80MHz,Prime(-496:16:496) = [M, 1, -M, 0, -M, 1, -M] *(1+j)/sqrt(2) • 1x HE-STF80MHz, Second(-496:16:496) = [-M, -1, M, 0, -M, 1, -M] *(1+j)/sqrt(2) • 2x HE-STF160MHz(-1016:8:1016) = [M, -1, M, -1, -M, -1, M, 0, -M, 1, M, 1, -M, 1, -M, 0, -M, 1, -M, 1, M, 1, -M, 0, -M, 1, M, 1, -M, 1, -M] *(1+j)/sqrt(2) • 2x HE-STF160MHz(±1016) = 0 • 2x HE-STF160MHz(±8) = 0 • 2x HE-STF80+80MHz = [2x HE-STF80MHz,Prime, 2x HE-STF80MHz,Second] • 2x HE-STF80MHz,Prime(-504:8:504) = [M, -1, M, -1, -M, -1, M, 0, -M, 1, M, 1, -M, 1, -M] *(1+j)/sqrt(2) • 2x HE-STF80MHz,Prime(±504) = 0 • 2x HE-STF80MHz, Second(-504:8:504) = [-M, 1, -M, 1, M, 1, -M, 0, -M, 1, M, 1, -M, 1, -M] *(1+j)/sqrt(2) • 2x HE-STF80MHz,Second(±504) = 0 Eunsung Park, LG Electronics

  20. References [1] 11-15-0132-15-00ax-spec-framework Eunsung Park, LG Electronics

  21. Appendix • Worst PAPR comparison between HE-LTF and HE-STF Eunsung Park, LG Electronics

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