US 11,909,852 B1
Frequency and gain calibration for time synchronization in a network
Philip A. Kratz, Redwood City, CA (US); Daniel M. Jacker, Redwood City, CA (US); Mainak Chowdhury, Redwood City, CA (US); and Alexander Hooshmand, Redwood City, CA (US)
Assigned to ZaiNar, Inc.
Filed by ZaiNar, Inc., Redwood City, CA (US)
Filed on Feb. 23, 2023, as Appl. No. 18/113,542.
Application 18/113,542 is a continuation of application No. 17/586,241, filed on Jan. 27, 2022, granted, now 11,632,226.
Application 17/586,241 is a continuation of application No. 17/135,566, filed on Dec. 28, 2020, granted, now 11,271,709, issued on Mar. 8, 2022.
Application 17/135,566 is a continuation of application No. 16/588,722, filed on Sep. 30, 2019, granted, now 10,911,211, issued on Feb. 2, 2021.
Claims priority of provisional application 62/738,889, filed on Sep. 28, 2018.
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/06 (2006.01); H04L 7/00 (2006.01); H04B 17/309 (2015.01); H04B 17/21 (2015.01); H04B 17/11 (2015.01)
CPC H04L 7/0012 (2013.01) [H04B 17/11 (2015.01); H04B 17/21 (2015.01); H04B 17/309 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A transceiver comprising:
a first clock; and
a processor configured to:
transmit a first calibration signal at a first time-of-departure measured by the first clock; and
transmit a second calibration signal at a second time-of-departure measured by the first clock;
access a first time-of-arrival of the first calibration signal received at a second transceiver, the first time-of-arrival measured by a second clock of the second transceiver;
access a second time-of-arrival of the second calibration signal received at the second transceiver, the second time-of-arrival measured by the second clock; and
calculate a first frequency offset between the first clock and the second clock based on the first time-of-departure, the first time-of-arrival, the second time-of-departure, and the second time-of-arrival.