US 12,273,285 B2
LTF compressed transmission
Jinmin Kim, Seoul (KR); Jinsoo Choi, Seoul (KR); Dongguk Lim, Seoul (KR); and Eunsung Park, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/755,603
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Mar. 19, 2020, PCT No. PCT/KR2020/003769
§ 371(c)(1), (2) Date May 3, 2022,
PCT Pub. No. WO2021/091029, PCT Pub. Date May 14, 2021.
Claims priority of application No. 10-2019-0142129 (KR), filed on Nov. 7, 2019.
Prior Publication US 2022/0399970 A1, Dec. 15, 2022
Int. Cl. H04L 5/00 (2006.01); H04B 7/0452 (2017.01); H04B 7/06 (2006.01); H04L 27/26 (2006.01)
CPC H04L 5/0046 (2013.01) [H04B 7/0452 (2013.01); H04B 7/06 (2013.01); H04L 5/0094 (2013.01); H04L 27/26 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method comprising:
generating, by a station (STA), long training field (LTF) symbols used for a plurality of streams including first to fourth streams,
wherein the LTF symbols are included in a physical protocol data unit (PPDU),
wherein the PPDU includes a legacy signal (L-SIG) field, a repeated L-SIG (RL-SIG) field which is a repeat of the L-SIG field, a universal signal (U-SIG) field, and a short training field (STF) symbol,
wherein the LTF symbols are contiguous to the STF symbol in the PPDU,
wherein the first to fourth streams are related to different LTF sequences,
wherein {1, 0, 0, 0} is repeated in an LTF sequence used for the first stream, {0, 1, 0, 0} is repeated in an LTF sequence used for the second stream repeats, {0, 0, 1, 0} is repeated in an LTF sequence used for the third stream, {0, 0, 0, 1} is repeated in an LTF sequence used for the fourth stream, and wherein a number of the LTF symbols are configured based on the first to fourth streams,
wherein the LTF sequences related to the first to fourth streams are multiplied by the same element of a P matrix; and
transmitting, by the STA, the PPDU.