US 12,284,067 B2
Long training field with reduced peak-to-average power ratio
Kanke Wu, San Diego, CA (US); Jialing Li Chen, San Diego, CA (US); Lin Yang, San Diego, CA (US); and Bin Tian, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jun. 21, 2021, as Appl. No. 17/353,673.
Claims priority of provisional application 63/051,264, filed on Jul. 13, 2020.
Claims priority of provisional application 63/046,569, filed on Jun. 30, 2020.
Claims priority of provisional application 63/042,557, filed on Jun. 22, 2020.
Prior Publication US 2021/0399933 A1, Dec. 23, 2021
Int. Cl. H04W 4/00 (2018.01); H04L 27/26 (2006.01); H04W 84/12 (2009.01)
CPC H04L 27/2621 (2013.01) [H04L 27/2607 (2013.01); H04L 27/2613 (2013.01); H04W 84/12 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method for wireless communication by a wireless communication device, comprising:
generating a data field for transmission using a first channel having a 320 MHz total channel bandwidth or a 240 MHz total channel bandwidth;
obtaining a long training field (LTF) sequence based on a concatenation of a plurality of LTF subsequences, each LTF subsequence being associated with a channel bandwidth less than the total channel bandwidth of the first channel, one or more of the plurality of LTF subsequences being selectively phase-rotated to reduce a peak-to-average power ratio, wherein a symbol duration of each symbol of the LTF sequence is one-fourth as long as a symbol duration of each symbol of the data field, and wherein the concatenation is a sequence formed by concatenating, in any order, a first LTF subsequence of the plurality of LTF subsequences, a second LTF subsequence of the plurality of LTF subsequences, a third LTF subsequence of the plurality of LTF subsequences, and a fourth LTF subsequence of the plurality of LTF subsequences, with k filler zeros between adjacent ones of the plurality of LTF subsequences; and
transmitting a wireless packet that includes the LTF sequence and the data field to at least one second wireless communication device via the first channel.