US 11,838,227 B2
Pilot tones in distributed resource unit (dRU) transmission
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 Jul. 30, 2021, as Appl. No. 17/390,828.
Prior Publication US 2023/0048884 A1, Feb. 16, 2023
Int. Cl. H04L 5/00 (2006.01)
CPC H04L 5/0044 (2013.01) [H04L 5/0048 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method for wireless communication performed by a wireless communication device, comprising:
modulating a physical layer convergence protocol (PLCP) protocol data unit (PPDU) on a number (M) of tones representing a logical resource unit (RU) that is associated with a number (K) of pilot tones each having a respective location relative to the M tones;
mapping the M tones to M noncontiguous subcarrier indices of a plurality of subcarrier indices spanning a wireless channel, the M tones mapped to the M noncontiguous subcarrier indices representing a distributed resource unit (dRU); and
transmitting, over the wireless channel, the PPDU including a number (N) of pilot tones each having a respective location relative to the M tones as mapped to the M noncontiguous subcarrier indices, the relative locations of the N pilot tones being different than the relative locations of the K pilot tones, the relative locations of the N pilot tones being associated with N subcarrier indices of the plurality of subcarrier indices, and each of the N subcarrier indices representing a respective pilot tone location associated with a 26-tone dRU.