EDMG STF for OFDM in 2,3,4CB Date: 2017-07-09 Authors: July 2017 Name May 2015 doc.: IEEE 802.11-15/0496r1 July 2017 EDMG STF for OFDM in 2,3,4CB Date: 2017-07-09 Authors: Name Company Address Phone Email Jinmin Kim LG Electronics jinmin1230.kim@lge.com SunWoong Yun sunwoong.yun@lge.com SungJin Park allean.park@lge.com Jinsoo Choi js.choi@lge.com Sang G. Kim sanggook.kim@lge.com Saehee Bang saehee.bang@lge.com Jinmin Kim (LG Electronics) Edward Au (Marvell Semiconductor)

Month Year Doc Title July 2017 Introduction In Draft 0.35, the EDMG-STF for OFDM in a single channel is defined. The key points of sequence are as follows: Frequency sequence 6 OFDM symbols 4 repetition pattern in a DFT period Mutually orthogonal sequence to prevent unintentional BF Low PAPR property / Good correlation performance In this contribution, we focus EDMG-STF in channel bonding cases. Jinmin Kim (LG Electronics) John Doe, Some Company

Proposed EDMG-STF for CB=2 (1/2) July 2017 Proposed EDMG-STF for CB=2 (1/2) The sequence is defined in frequency domain 1st~6th EDMG-STF symbols: where “iSTS” is the space-time stream number and 1 ≤ iSTS ≤ 8 The sequences and are defined as follows: Jinmin Kim (LG Electronics)

Proposed EDMG-STF for CB=2 (2/2) July 2017 Proposed EDMG-STF for CB=2 (2/2) The sequences and are generated using the following recursive procedure for iSTS =1, 2, … , 8 where k defines iteration index, the value of the defines the weight for sequence of iSTS-th space-time stream and k-th iteration Jinmin Kim (LG Electronics)

Proposed EDMG-STF for CB=3 (1/3) July 2017 Proposed EDMG-STF for CB=3 (1/3) The sequence is defined in frequency domain 1st~6th EDMG-STF symbols: where “iSTS” is the space-time stream number and 1 ≤ iSTS ≤ 8 The sequences and are defined as follows: Jinmin Kim (LG Electronics)

Proposed EDMG-STF for CB=3 (2/3) July 2017 Proposed EDMG-STF for CB=3 (2/3) The sequences and are defined as follows: Jinmin Kim (LG Electronics)

Proposed EDMG-STF for CB=3 (3/3) July 2017 Proposed EDMG-STF for CB=3 (3/3) The sequences and are generated using the following recursive procedure for iSTS =1, 2, … , 8 where k defines iteration index, the value of the defines the weight for sequence of iSTS-th space-time stream and k-th iteration Jinmin Kim (LG Electronics)

Proposed EDMG-STF for CB=4 (1/3) July 2017 Proposed EDMG-STF for CB=4 (1/3) The sequence is defined in frequency domain 1st~6th EDMG-STF symbols: where “iSTS” is the space-time stream number and 1 ≤ iSTS ≤ 8 The sequences and are defined as follows: Jinmin Kim (LG Electronics)

Proposed EDMG-STF for CB=4 (2/3) July 2017 Proposed EDMG-STF for CB=4 (2/3) The sequences and are defined as follows: Jinmin Kim (LG Electronics)

Proposed EDMG-STF for CB=4 (3/3) July 2017 Proposed EDMG-STF for CB=4 (3/3) The sequences and are generated using the following recursive procedure for iSTS =1, 2, … , 8 where k defines iteration index, the value of the defines the weight for sequence of iSTS-th space-time stream and k-th iteration Jinmin Kim (LG Electronics)

Space-time stream number July 2017 PAPR performance The proposed EDMG-STF has acceptable PAPR properties in the table below And, all sequences for space-time stream are mutually orthogonal Space-time stream number NCB = 2 NCB = 3 NCB = 4 1 2.99 3.85 3.00 2 3.86 3 3.87 3.01 4 3.80 5 3.88 6 7 3.89 8 3.91 Jinmin Kim (LG Electronics)

Correlation performance(1/5) July 2017 Correlation performance(1/5) To investigate correlation performance, we use merit factor introduced in [1] , where “N” defines sequence length Proposed sequences have reasonable performance compared to legacy Golay sequences [1] M.J.E. Golay, “Sieves for low autocorrelation binary sequences,” IEEE Trans. Inform. Theory, IT-23, no. 1, pp. 43-51, 1977 Ga32 Ga64 Ga128 Proposed sequence Stream 1 Stream 2 Stream 3 Stream 4 Stream 5 Stream 6 Stream 7 Stream 8 Merit factor 2.90 3.0 3.12 CB=2 3.02 CB=3 2.70 2.81 2.73 2.65 2.76 CB=4 3.18 2.87 2.99 3.14 2.96 2.93 Jinmin Kim (LG Electronics)

Correlation performance(2/5) July 2017 Correlation performance(2/5) For the comparison with STF in 11a/11n, we simulate autocorrelation performance in time domain 4repetition pattern in DFT period FFT size = 64,128 First peak = 1(normalized) Second Peak = 0.28, 0.28 STF in 11a(20MHz) STF in 11n(40MHz) Jinmin Kim (LG Electronics)

Correlation performance(3/5) July 2017 Correlation performance(3/5) Proposed STF for NCB=2 4repetition pattern in DFT period FFT size = 1024 First peak = 1(normalized) Second Peak = 0.29 Jinmin Kim (LG Electronics)

Correlation performance(4/5) July 2017 Correlation performance(4/5) Proposed STF for NCB=3 4repetition pattern in DFT period FFT size = 1536 First peak = 1(normalized) Second Peak = 0.26 Jinmin Kim (LG Electronics)

Correlation performance(5/5) July 2017 Correlation performance(5/5) Proposed STF for NCB=4 4repetition pattern in DFT period FFT size = 2048 First peak = 1(normalized) Second Peak = 0.24 Jinmin Kim (LG Electronics)

Conclusion We proposed EDMG-STF in CB>1 July 2017 Conclusion We proposed EDMG-STF in CB>1 Proposed sequence has acceptable performance compared to other preamble Jinmin Kim (LG Electronics)

July 2017 SP/M #1 Do you agree to include the text for EDMG-STF for EDMG OFDM mode in CB>1 proposed in (11-17-1029-00-00ay-EDMG-STF for OFDM in 2,3,4CB Draft) to the spec draft? Jinmin Kim (LG Electronics)