US 2026/0171994 A1 · SEMI-PARAMETRIC DIGITAL PRE-DISTORTION

Abstract

A digital pre-distortion circuit and technique for a signal being amplified. Digital pre-distortion is performed using a model-based pre-distortion function. Pre-distortion is further corrected using a data-driven pre-distortion function. The model-based pre-distortion function and the data-driven pre-distortion function are trained using training data including a digital loopback signal generated by sampling a loopback signal of an amplifier, the digital pre-distorted signal input to the amplifier for a time period, and an intermediate signal output from the model-based pre-distortion function driven by the digital loopback signal or an output of the data-driven pre-distortion function. Parameters may be continually updated in order to account for changes in characteristics of the amplifier.

Claims20

Dependent claims

A device comprising one or more circuits configured to perform operations comprising:

generating a digital pre-distorted signal input to an amplifier by:
performing a digital pre-distortion of a signal using a model-based pre-distortion function;
and
correcting the digital pre-distortion of the signal using a data-driven pre-distortion function;
generating training data comprising (i) a digital loopback signal generated by sampling a loopback signal of an amplifier, (ii) the digital pre-distorted signal input to the amplifier, and (iii) an intermediate signal output from the model-based pre-distortion function driven by the digital loopback signal or an output of the data-driven pre-distortion function;
estimating parameters of the model-based pre-distortion function using the training data;
and
training the data-driven pre-distortion function to correct the digital pre-distortion using the training data.

5 more elements

Dependencies are inferred from the claim text.

Semi-parametric digital pre-distortion

Life of this patent

Semi-parametric digital pre-distortion

Life of this patent

Abstract

Claims20