US 11,686,805 B1
Method and system for radiofrequency localization of transmitting devices via a mesh network
Philip Kratz, Redwood City, CA (US); Daniel Jacker, Redwood City, CA (US); Mainak Chowdhury, Redwood City, CA (US); and Alexander Hooshmand, Redwood City, CA (US)
Assigned to ZaiNar, Inc., Redwood City, CA (US)
Filed by ZaiNar, Inc., Redwood City, CA (US)
Filed on Oct. 26, 2020, as Appl. No. 17/80,729.
Application 17/080,729 is a continuation of application No. 16/814,285, filed on Mar. 10, 2020, granted, now 10,859,666.
Application 16/814,285 is a continuation of application No. 16/186,336, filed on Nov. 9, 2018, granted, now 10,627,474.
Application 16/186,336 is a continuation in part of application No. 15/644,717, filed on Jul. 7, 2017, granted, now 10,455,350, issued on Oct. 22, 2019.
Claims priority of provisional application 62/690,476, filed on Jun. 27, 2018.
Claims priority of provisional application 62/360,446, filed on Jul. 10, 2016.
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 5/02 (2010.01); G01S 5/14 (2006.01); H04W 84/18 (2009.01)
CPC G01S 5/0221 (2013.01) [G01S 5/0215 (2013.01); G01S 5/14 (2013.01); H04W 84/18 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method comprising:
for each pair of nodes in a set of nodes:
at each node in the pair of nodes:
transmitting an outbound synchronization signal;
receiving a self-receive signal associated with the outbound synchronization signal; and
receiving an inbound synchronization signal;
based on the self-receive signal and the synchronization signal received by each node in the pair of nodes:
calculating a pairwise time offset between the pair of nodes; and
calculating a pairwise distance between the pair of nodes; and
at each node in the set of nodes, receiving a localization signal, transmitted by a device; and
calculating a location of the device relative to the set of nodes based on the localization signal received at each node in the set of nodes, the pairwise time offset and the pairwise distance.