US 11,722,981 B2
Re-estimating clock offset for frequency-selective wireless channels
Brian D. Hart, Sunnyvale, CA (US); Ardalan Alizadeh, Milpitas, CA (US); Daniel J. Lyons, Medina, OH (US); and Matthew A. Silverman, Shaker Heights, OH (US)
Assigned to Cisco Technology, Inc., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Jul. 29, 2021, as Appl. No. 17/444,008.
Prior Publication US 2023/0034115 A1, Feb. 2, 2023
Int. Cl. H04W 56/00 (2009.01); H04L 27/26 (2006.01)
CPC H04W 56/0095 (2013.01) [H04L 27/2657 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving a network packet;
estimating, using a preamble of the network packet, a power distribution corresponding to a plurality of subcarriers of a channel;
estimating a carrier frequency offset using the power distribution; and
estimating a clock offset using the carrier frequency offset.