Method of and circuit for predistortion for a cable TV amplifier
US10715702B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2019 |
| Grant date | Jul 14, 2020 |
| Priority date | — |
| Expiry date | Mar 12, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2201/3221
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital predistortion (DPD) system includes an input configured to receive a DPD input signal. In some examples, a non-linear datapath is coupled to the input, where the non-linear datapath is configured to add a non-linear mirror image component to the DPD input signal to provide a non-linear signal that is used to generate a first predistortion signal. In some embodiments, a linear datapath is coupled to the input in parallel with the non-linear datapath to generate a second predistortion signal. A first combiner is configured to combine the first predistortion signal and the second predistortion signal to generate a DPD output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.