US 11,057,063 B1 · Dual-band digital pre-distortion

Abstract

A model structure modeling a power amplifier is based on at least a binomial expansion, a first building block, a second building block, and a third building block. The first building block is a first complex sub-band signal with a first delay, the second building block is a multiplication of the first complex sub-band signal with a second delay and a complex conjugate of the first complex sub-band signal with a third delay, and the third building block is a multiplication of a second complex sub-band signal with a fourth delay and a complex conjugate of the second complex sub-band signal with a fifth delay. The sum of the first complex sub-band signal and the second complex sub-band signal is a baseband signal. Terms are obtained by optimizing delay combinations for the model structure. The model structure is used to dual-band digital pre-distortion of the baseband signal.

Claims19

Dependent claims

A circuitry for dual-band digital pre-distortion of a baseband signal, the circuitry comprising hardware elements that are configured to perform:

modeling a power amplifier by a model structure, which is based on at least a binomial expansion, a first building block, a second building block, and a third building block, wherein the first building block is a first complex sub-band signal with a first delay, the second building block is a multiplication of the first complex sub-band signal with a second delay and a complex conjugate of the first complex sub-band signal with a third delay and the third building block is a multiplication of a second complex sub-band signal with a fourth delay and a complex conjugate of the second complex sub-band signal with a fifth delay, wherein the sum of the first complex sub-band signal and the second complex sub-band signal is the baseband signal which is equal to the first complex sub-band signal with the first delay, and wherein terms for the model are obtained by optimizing delay combinations for the model structure;
and
using the model structure to the dual-band digital pre-distortion of the baseband signal.

An apparatus, comprising:

at least one processor;
and
at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus to:
model a power amplifier by a model structure, which is based on at least a binomial expansion, a first building block, a second building block, and a third building block, wherein the first building block is a first complex sub-band signal with a first delay, the second building block is a multiplication of the first complex sub-band signal with a second delay and a complex conjugate of the first complex sub-band signal with a third delay and the third building block is a multiplication of a second complex sub-band signal with a fourth delay and a complex conjugate of the second complex sub-band signal with a fifth delay, wherein the sum of the first complex sub-band signal and the second complex sub-band signal is a baseband signal which is equal to the first complex sub-band signal with the first delay, and wherein terms for the model are obtained by optimizing delay combinations for the model structure;
and
use the model structure to dual-band digital pre-distortion of the baseband signal.

3 more elements

A method for dual-band digital pre-distortion of a baseband signal, the method comprising:

modeling a power amplifier by a model structure, which is based on at least a binomial expansion, a first building block, a second building block, and a third building block, wherein the first building block is a first complex sub-band signal with a first delay, the second building block is a multiplication of the first complex sub-band signal with a second delay and a complex conjugate of the first complex sub-band signal with a third delay and the third building block is a multiplication of a second complex sub-band signal with a fourth delay and a complex conjugate of the second complex sub-band signal with a fifth delay, wherein the sum of the first complex sub-band signal and the second complex sub-band signal is the baseband signal which is equal to the first complex sub-band signal with the first delay, and wherein terms for the model are obtained by optimizing delay combinations for the model structure;
and
using the model structure to the dual-band digital pre-distortion of the baseband signal.

Dependencies are inferred from the claim text.

Dual-band digital pre-distortion

Life of this patent

Dual-band digital pre-distortion

Life of this patent

Abstract

Claims19