US 12,292,526 B2
Wireless mapping in real-time using correlative passive receiver
Vahid Ataie, San Diego, CA (US)
Assigned to Raytheon Company, Arlington, VA (US)
Filed by Raytheon Company, Waltham, MA (US)
Filed on May 26, 2022, as Appl. No. 17/825,902.
Claims priority of provisional application 63/193,520, filed on May 26, 2021.
Prior Publication US 2022/0381874 A1, Dec. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 5/04 (2006.01); G01S 5/02 (2010.01); H04W 4/02 (2018.01); H04W 4/029 (2018.01)
CPC G01S 5/04 (2013.01) [G01S 5/0294 (2013.01); H04W 4/023 (2013.01); H04W 4/029 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A method of mapping a plurality of wireless emitters in a geographic area, the method comprising:
obtaining a set of signal inputs corresponding to wireless emissions from the plurality of wireless emitters received at three or more antennas;
processing the set of signal inputs to determine a plurality of cyclic autocorrelation functions or spectral correlation functions for a plurality of pairs of signal inputs of the set of signal inputs using a correlative receiver;
analyzing one or more of the plurality of cyclic autocorrelation functions or spectral correlation functions to identify a set of classes or types of the plurality of wireless emitters; and
determining a set of geolocations of the plurality of wireless emitters using the cyclic autocorrelation functions or the spectral correlation functions.