1. EDMG STF for OFDM in 2,3,4CB Date: 2017-07-09 Authors: July 2017 Name
May 2015
doc.: IEEE /0496r1
July 2017
EDMG STF for OFDM in 2,3,4CB
Date:
Authors:
Name
Company
Address
Phone
Jinmin Kim
LG Electronics
SunWoong Yun
SungJin Park
Jinsoo Choi
Sang G. Kim
Saehee Bang
Jinmin Kim (LG Electronics)
Edward Au (Marvell Semiconductor)

2. 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

3. 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)

4. 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)

5. 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)

6. 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)

7. 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)

8. 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)

9. 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)

10. 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)

11. 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)

12. 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 , 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)

13. 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)

14. 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)

15. 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)

16. 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)

17. 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)

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