US 12,218,884 B2
Global cyclic shift delays for distributed transmissions
Lin Yang, San Diego, CA (US); Bin Tian, San Diego, CA (US); Youhan Kim, Saratoga, CA (US); and Qifan Chen, Newark, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Oct. 15, 2021, as Appl. No. 17/503,215.
Prior Publication US 2023/0124579 A1, Apr. 20, 2023
Int. Cl. H04L 5/00 (2006.01); H04L 27/26 (2006.01)
CPC H04L 5/0092 (2013.01) [H04L 27/2602 (2013.01); H04L 27/2627 (2013.01)] 18 Claims
OG exemplary drawing
 
15. A wireless communication device for wireless communication, comprising:
one or more memories storing processor-executable code; and
one or more processors coupled with the one or more memories and operable to execute the code to cause the wireless communication device to:
obtain data for transmission in a physical layer convergence protocol (PLCP) protocol data unit (PPDU);
modulate the data on a number (M) of tones of a logical resource unit (RU), the M tones mapped to M noncontiguous subcarrier indices of a plurality of subcarrier indices spanning a wireless channel according to a distributed tone plan, the M tones of the logical RU mapped to the M noncontiguous subcarrier indices representing a distributed resource unit (dRU) assigned to the wireless communication device, wherein a bandwidth of the wireless channel is larger than a bandwidth of the logical RU;
obtain a sequence of values representing a short training field (STF) of the PPDU based on a bandwidth associated with the wireless channel;
map the data and the sequence of values to one or more spatial streams;
apply one or more cyclic shift delays (CSDs) to the sequence of values mapped to the one or more spatial streams, respectively, based on the dRU assignment; and
transmit the PPDU, including the sequence of values mapped to the one or more spatial streams, over the wireless channel.