US 11,683,212 B2
Method and apparatus for applying phase rotation in broadband with 80MHz based preamble puncturing performed in WLAN system
Eunsung Park, Seoul (KR); Jinmin Kim, Seoul (KR); Dongguk Lim, Seoul (KR); and Jinsoo Choi, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/268,201
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Aug. 26, 2019, PCT No. PCT/KR2019/010824
§ 371(c)(1), (2) Date Feb. 12, 2021,
PCT Pub. No. WO2020/045910, PCT Pub. Date Mar. 5, 2020.
Claims priority of application No. 10-2018-0100692 (KR), filed on Aug. 27, 2018; and application No. 10-2018-0106200 (KR), filed on Sep. 5, 2018.
Prior Publication US 2021/0320830 A1, Oct. 14, 2021
Int. Cl. H04L 27/26 (2006.01); H04W 84/12 (2009.01)
CPC H04L 27/2621 (2013.01) [H04L 27/2618 (2013.01); H04W 84/12 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for transmitting an Extreme High Throughput (EHT) Physical Protocol Data Unit (PPDU) in a wireless LAN system, the method comprising:
generating, by a transmitting device, the EHT PPDU, wherein the EHT PPDU includes a legacy preamble and an EHT field; and
transmitting, by the transmitting device, the EHT PPDU to a receiving device through a 320 MHz band having 80 MHz punctured,
wherein the legacy preamble includes a Legacy-Short Training Field (L-STF) and a Legacy-Long Training Field (L-LTF),
wherein the legacy preamble is generated by applying a first phase rotation value for a 320 MHz band,
wherein the first phase rotation value is [1 −1 −1 −1 1 −1 −1 −1 −1 1 1 1 −1 1 1 1], and
wherein the 320 MHz band is configured of subcarriers having subcarrier indexes from −512 to 511,
wherein the L-STF is generated by applying the first phase rotation value to an L-STF sequence,
wherein the L-STF sequence is configured by repeating an L-STF sequence defined for a 20 MHz band,
wherein the L-STF sequence defined for the 20 MHz band is sqrt(½)*[0 0 0 0 0 0 0 0 1 +j 0 0 0 −1−j 0 0 0 1 +j 0 0 0 −1−j 0 0 0 −1 −j 0 0 0 1 +j 0 0 0 0 0 0 0 −1 −j 0 0 0 −1 −j 0 0 0 1 +j 0 0 0 1 +j 0 0 0 1 +j 0 0 0 1 +j 0 0 0 0 0 0 0],
wherein the L-LTF is generated by applying the first phase rotation value to an L-LTF sequence,
wherein the L-LTF sequence is configured by repeating an L-LTF sequence defined for a 20 MHz band, and
wherein the L-LTF sequence defined for the 20 MHz band is [0 0 0 0 0 0 1 1 −1 −1 1 1 −1 1 −1 1 1 1 1 1 1 −1 −1 1 1 −1 1 −1 1 1 1 1 0 1 −1 −1 1 1 −1 1 −1 1 −1 −1 −1 −1 −1 1 1 −1 −1 1 −1 1 −1 1 1 1 1 0 0 0 0 0].