Title:
RADIO COMMUNICATION DEVICE AND DISTORTION COMPENSATION METHOD
Document Type and Number:
Japanese Patent JP2022181303
Kind Code:
A
Abstract:
To compensate nonlinear distortion generated in a power amplifier that amplifies signals of a plurality of different frequency bands.SOLUTION: A radio communication device comprises: a plurality of antenna elements; a phase shifter that forms beams corresponding to first band data and second band data having different frequency bands; a power amplifier that amplifies the first band data and the second band data; and a processor. The processor calculates a distortion compensation signal that compensates nonlinear distortion in the first band data and the second band data using a first distortion compensation coefficient, and performs processing to calculate an out-of-band compensation signal that compensates out-of-signal band nonlinear distortion of the first band data and the second band data using a second distortion compensation coefficient, and the power amplifier amplifies a signal in which the out-of-band compensation signal is synthesized with the distortion compensation signal.SELECTED DRAWING: Figure 2
Inventors:
LOZHKIN ALEXANDER NIKOLAEVICH
OTA TOMOYA
OTA TOMOYA
Application Number:
JP2021088179A
Publication Date:
December 08, 2022
Filing Date:
May 26, 2021
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
H03F1/32; H03F3/24; H04B1/04; H04B7/06
Attorney, Agent or Firm:
Sakai International Patent Office