US 12,149,294 B2
Hybrid in-situ and signal of opportunity calibration for antenna arrays
Sharanya Srinivas, Tempe, AZ (US); and Daniel W. Bliss, Phoenix, AZ (US)
Assigned to Arizona Board of Regents on behalf of Arizona State University, Scottsdale, AZ (US)
Filed by Sharanya Srinivas, Tempe, AZ (US); and Daniel W. Bliss, Phoenix, AZ (US)
Filed on Jan. 31, 2022, as Appl. No. 17/589,297.
Claims priority of provisional application 63/143,100, filed on Jan. 29, 2021.
Prior Publication US 2022/0247501 A1, Aug. 4, 2022
Int. Cl. H04B 17/12 (2015.01); H01Q 3/30 (2006.01); H04B 7/06 (2006.01); H04B 7/185 (2006.01)
CPC H04B 17/12 (2015.01) [H01Q 3/30 (2013.01); H04B 7/0617 (2013.01); H04B 7/18513 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for calibration of an antenna array, comprising:
receiving calibration signals from each of an in-situ radio frequency (RF) source and one or more remote RF sources;
estimating a direction of arrival for each of the in-situ RF source and the one or more remote RF sources to produce a set of estimated directions of arrival; and
comparing the set of estimated directions of arrival with a corresponding set of known directions of arrival to calibrate the antenna array by determining a first estimated steering vector based on the set of estimated directions and matching the first estimated steering vector to a second estimated streeting vector modeled with distortions.