US 11,729,583 B2
Systems and methods for TOA and DOA acquisition and tracking for signal of opportunity positioning
Zak Kassas, Irvine, CA (US); and Kimia Shamaei, Irvine, CA (US)
Assigned to The Regents of the University of California, Oakland, CA (US)
Filed by The Regents of the University of California, Oakland, CA (US)
Filed on Apr. 22, 2021, as Appl. No. 17/237,290.
Claims priority of provisional application 63/013,638, filed on Apr. 22, 2020.
Prior Publication US 2021/0337357 A1, Oct. 28, 2021
Int. Cl. H04W 4/029 (2018.01); G01S 5/02 (2010.01)
CPC H04W 4/029 (2018.02) [G01S 5/0205 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for positioning using signals of opportunity based on joint time of arrival (TOA) and direction of arrival (DOA) acquisition and tracking, the method comprising:
receiving, by a device, at least one signal of opportunity;
performing, by the device, an estimation of time of arrival (TOA) and direction of arrival (DOA) for the at least one signal of opportunity, wherein the estimation of TOA and DOA is jointly determined by the device;
performing, by the device, signal tracking of TOA and DOA estimates for the at least one signal of opportunity, wherein the TOA and DOA estimates are refined based on an azimuth, elevation and delay locked-loops; and
determining, by the device, a location for the device based on refined TOA and DOA estimates.