US 12,452,118 B2
LTF and STF transmission for wide bandwidth 240MHz with more DC tones in wireless communications
Shengquan Hu, San Jose, CA (US); Ching-Wen Hsiao, Hsinchu (TW); Jianhan Liu, San Jose, CA (US); and Thomas Edward Pare, Jr., San Jose, CA (US)
Assigned to MediaTek Inc., (TW)
Filed by MediaTek Inc., Hsinchu (TW)
Filed on Nov. 21, 2023, as Appl. No. 18/515,311.
Claims priority of provisional application 63/384,785, filed on Nov. 23, 2022.
Prior Publication US 2024/0171438 A1, May 23, 2024
Int. Cl. H04L 27/26 (2006.01); H04L 5/00 (2006.01)
CPC H04L 27/2613 (2013.01) [H04L 5/0007 (2013.01); H04L 5/0048 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method, comprising:
generating both of a long-training field (LTF) and a short training field (STF) of a physical-layer protocol data unit (PPDU) with a center 996-tone resource unit (RU) having more than a predetermined number of direct-current (DC) tones; and
performing a wireless communication in a wide bandwidth with the PPDU,
wherein the generating of the LTF of the PPDU comprises generating the LTE using a one-step operation or a two-step operation,
wherein the generating of the LTF using the one-step operation comprises mapping tone indices of a center 996-tone RU (RU996) of an optimized LTF sequence to corresponding tone indices of a center RU996 of an ultra-high reliability (UHR) LTF (UHR-LTF) sequence with more than five DC tones, and
wherein the generating of the LTF using the two-step operation comprises:
selecting a segment of an optimized LTF sequence using a five-DC-tone center RU996 tone plan; and
mapping the selected segment of the optimized LTF sequence to tone indices of a center RU996 of an ultra-high reliability (UHR) LTF (UHR-LTF) sequence with more than five DC tones.