	US 12,309,009 B2
	Method and device for configuring 2X EHT-STF sequence by repeating STF sequence for 40 MHz band in wireless LAN system
Eunsung Park, Seoul (KR); Jinyoung Chun, Seoul (KR); Jinsoo Choi, Seoul (KR); and Dongguk Lim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/922,289
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Apr. 30, 2021, PCT No. PCT/KR2021/005507 § 371(c)(1), (2) Date Oct. 28, 2022, PCT Pub. No. WO2021/235735, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 10-2020-0059226 (KR), filed on May 18, 2020; and application No. 10-2020-0061069 (KR), filed on May 21, 2020.
Prior Publication US 2023/0179458 A1, Jun. 8, 2023
Int. Cl. H04B 7/0452 (2017.01); H04L 27/26 (2006.01); H04W 84/12 (2009.01)

CPC H04L 27/2602 (2013.01) [H04B 7/0452 (2013.01); H04L 27/2614 (2013.01); H04W 84/12 (2013.01)]

17 Claims

1. A method in a Wireless Local Area Network (WLAN) system, the method comprising:

receiving, by a receiving station (STA), a Physical Protocol Data Unit (PPDU) through a broadband from a transmitting STA; and

decoding, by the receiving STA, the PPDU,

wherein the PPDU includes a Short Training Field (STF) signal,

wherein the STF signal is generated based on a first STF sequence for the broadband,

wherein when the broadband is a 320 MHz band, the first STF sequence is a sequence including an M sequence and is defined as follows:

{M −1 −M 0 M −1 M 0 M −1 −M 0 M −1 M 0 M −1 −M 0 M −1 M 0 M −1 −M 0 M −1 M 0 −M 1 M 0 −M 1 −M 0 M −1 −M 0 M −1 M 0 M −1 −M 0 M −1 M 0 −M 1 M 0 −M 1 −M}*(1+j)/sqrt(2), wherein sqrt( ) denotes a square root,

wherein the M sequence is defined as follows:

M={−1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1}, and

wherein elements with a tone index of −8, +8, −504, +504, −520, +520, −1016, +1016, −1032, +1032, −1528, +1528, −1544, +1544, −2040, +2040 among the first STF sequence are set to 0.