US 12,143,197 B2
Geolocation of radio frequency devices using spaceborne phased arrays
Raymond J. Sedwick, University Park, MD (US); and Abel Avellan, Coral Gables, FL (US)
Assigned to AST & Science, LLC, Miami, FL (US)
Filed by AST & Science, LLC, Miami, FL (US)
Filed on May 19, 2023, as Appl. No. 18/199,629.
Application 18/199,629 is a continuation of application No. 17/575,087, filed on Jan. 13, 2022, granted, now 11,750,275.
Application 17/575,087 is a continuation of application No. 17/171,759, filed on Feb. 9, 2021, granted, now 11,239,904, issued on Feb. 1, 2022.
Claims priority of provisional application 62/975,027, filed on Feb. 11, 2020.
Prior Publication US 2023/0370156 A1, Nov. 16, 2023
Int. Cl. H04B 7/185 (2006.01); H04B 7/024 (2017.01); H04W 84/06 (2009.01)
CPC H04B 7/18513 (2013.01) [H04B 7/024 (2013.01); H04B 7/1855 (2013.01); H04W 84/06 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A satellite communication system, comprising:
one or more low Earth orbit (LEO) satellites having a phased antenna array configured to provide a plurality of beams for communication within a field of view, the field of view having a plurality of cells and each of the plurality of beams is associated with one of the plurality of cells within the field of view; and
one or more delay compensators configured to perform delay compensation on signals relative to a beam center for each respective beam of the plurality of beams;
wherein the phased antenna array is configured to receive a signal from a wireless device via one of the plurality of beams and is configured to detect that the signal is within a specific one of the plurality of cells within the field of view based upon the delay compensation; and
wherein the one or more LEO satellites include:
a central processor configured to take data from individual beams of the plurality of beams and package the data into a combined signal; and
a communication antenna separate from the phased antenna array, the communication antenna configured to transmit the combined signal to a ground station separate from the wireless device.