US 12,334,964 B2
Wireless communication apparatus and distortion compensation method
Tomoya Ota, Kawasaki (JP); and Hiroyoshi Ishikawa, Kawasaki (JP)
Assigned to FUJITSU LIMITED, Kawasaki (JP)
Filed by FUJITSU LIMITED, Kawasaki (JP)
Filed on Jul. 29, 2022, as Appl. No. 17/877,441.
Claims priority of application No. 2021-184064 (JP), filed on Nov. 11, 2021.
Prior Publication US 2023/0142029 A1, May 11, 2023
Int. Cl. H04B 1/04 (2006.01)
CPC H04B 1/0483 (2013.01) [H04B 1/0475 (2013.01); H04B 2001/0433 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A wireless communication apparatus comprising:
a plurality of antenna elements;
a plurality of power amplifiers provided in the plurality of antenna elements;
a processor that outputs a transmission signal to the plurality of power amplifiers; and
a plurality of feedback paths each of which allows a feedback signal to be fed back from the plurality of power amplifiers to the processor, wherein the processor executes a process comprising:
collectively correcting variations in analog characteristics exhibited in the plurality of feedback paths, and
updating, by using the transmission signal and the feedback signal that are obtained by being corrected, a distortion compensation coefficient that is used to compensate nonlinear distortion produced in the plurality of power amplifiers.