Digital predistortion tailored to specified frequencies in the power amplifier (PA) output spectrum
US10097141B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2017 |
| Grant date | Oct 9, 2018 |
| Priority date | — |
| Expiry date | Jun 6, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0425
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus to apply frequency selective digital predistortion (DPD) to a power amplifier (PA) circuit is disclosed. The apparatus comprises a first transformation circuit configured to receive a PA input comprising a quantity indicative of an input signal of the PA circuit and process the PA input by applying a first predetermined weighted function, to form a processed PA input, and a second transformation circuit configured to receive a PA output comprising a quantity indicative of an output signal of the PA circuit and process the PA output by applying a second predetermined weighted function, to form a processed PA output. The apparatus further comprises a coefficient computation circuit configured to receive the processed PA input and the processed PA output; and estimate distortion coefficients, to be utilized for predistorting the input signal of the PA circuit, based on the processed PA input and the processed PA output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.