US 12,219,504 B2
Localization using repeated transmissions of electromagnetic signals for mobile ad hoc networks
James J. Richardson, Temecula, CA (US); and Gregory W. Heinen, Tucson, AZ (US)
Assigned to Raytheon Company, Tewksbury, MA (US)
Filed by Raytheon Company, Waltham, MA (US)
Filed on Jul. 29, 2019, as Appl. No. 16/525,240.
Prior Publication US 2023/0199677 A1, Jun. 22, 2023
Int. Cl. H04W 64/00 (2009.01); G01S 11/12 (2006.01); G01S 11/16 (2006.01); G01S 13/87 (2006.01); H04W 4/02 (2018.01); H04W 56/00 (2009.01); H04W 84/18 (2009.01)
CPC H04W 56/001 (2013.01) [G01S 11/12 (2013.01); G01S 11/16 (2013.01); G01S 13/87 (2013.01); H04W 4/023 (2013.01); H04W 56/002 (2013.01); H04W 64/00 (2013.01); H04W 84/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
transmitting a first electromagnetic signal from a first node to a second node;
receiving a second electromagnetic signal from the second node at the first node;
repeating the transmission of the first electromagnetic signal and the reception of the second electromagnetic signal multiple times; and
identifying, based on the repeated transmissions and receptions, a time-of-flight of one of the electromagnetic signals based on dividing (i) a combined travel time for the electromagnetic signals to repeatedly travel between the first and second nodes by (ii) a number of the electromagnetic signals;
wherein the time-of-flight multiplied by a speed of the electromagnetic signals is indicative of a distance between the nodes.