US 12,236,171 B2
Modeling device, calculation method, and non-transitory computer-readable storage medium for distortion compensation of amplifer
Masahiko Onishi, Osaka (JP); and Eiji Mochida, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Filed on Mar. 15, 2021, as Appl. No. 17/201,875.
Claims priority of application No. 2020-061018 (JP), filed on Mar. 30, 2020.
Prior Publication US 2021/0303756 A1, Sep. 30, 2021
Int. Cl. G06F 30/20 (2020.01); G06F 111/10 (2020.01)
CPC G06F 30/20 (2020.01) [G06F 2111/10 (2020.01)] 15 Claims
OG exemplary drawing
 
1. A distortion compensation device for performing distortion compensation on a signal to be amplified by an amplifier,
the distortion compensation device having a modeling device performing calculation using an amplifier model that models the amplifier of which an internal state affecting a distortion characteristic varies,
wherein the amplifier model includes:
a plurality of calculation models that model the amplifier in different internal states, and
a combiner that combines the plurality of calculation models at a combination ratio corresponding to the internal state that varies,
a generator configured to generate a parameter indicating the internal state,
wherein each of the plurality of calculation models expresses a first memory effect having a first response time in the amplifier,
wherein a parameter calculation model for calculating the parameter expresses a second memory effect having a second response time in the amplifier, the second response time being longer than the first response time,
wherein a degree of influence of the second memory effect on the distortion characteristic varies depending on the internal state of the amplifier, and
wherein the combination ratio is based on the parameter and has a value corresponding to the internal state.