US 11,671,130 B2
Obtaining reliable and specific data for adaptive digital predistortion
Stephen Summerfield, Santa Clara, CA (US); Praveen Chandrasekaran, Bangalore (IN); and Christopher Mayer, Dover, MA (US)
Assigned to Analog Devices International Unlimited Company, Limerick (IE)
Filed by Analog Devices International Unlimited Company, Limerick (IE)
Filed on Nov. 30, 2021, as Appl. No. 17/537,724.
Claims priority of provisional application 63/123,573, filed on Dec. 10, 2020.
Prior Publication US 2022/0190852 A1, Jun. 16, 2022
Int. Cl. H04B 1/04 (2006.01)
CPC H04B 1/0475 (2013.01) [H04B 2001/0425 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A digital predistortion (DPD) arrangement, the DPD arrangement comprising:
a DPD actuator circuit to predistort, using DPD coefficients, at least a portion of an input signal, the DPD coefficients associated with a characteristic of a nonlinear component;
a DPD capture circuit to:
capture, based on a capture cycle timing, multiple portions of a feedback signal, the feedback signal indicative of an output of the nonlinear component;
compute, based on one or more characteristics of the multiple captured portions, one or more criteria for a subsequent capture of the feedback signal; and
perform, based on the one or more criteria, the subsequent capture by capturing a subsequent portion of the feedback signal that satisfies the one or more criteria; and
a DPD adaptation circuit to update the DPD coefficients based at least in part on the subsequent capture.