Linearization device for a power amplifier
US8432220B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 22, 2010 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Feb 26, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3258
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A linearization device for a power amplifier using adaptive digital baseband predistortion includes a pre-inverse block receiving a complex discretized input signal {tilde over (x)}e(n) and restoring a complex predistorted signal {tilde over (x)}p(n) at the power amplifier input. The pre-inverse block includes a first module and a second module receiving the modulus of the complex input signal |{tilde over (x)}e(n)| at the input whose value is included in an amplitude domain varying between two values 0 and Amax, the amplitude domain being split into a plurality of segments, the first module associating with each value of the complex input signal modulus |{tilde over (x)}e(n)| contained in a given segment, a set of several parameters defining a model implemented in the second module via a function Fj, the second module restoring a value Fj(|{tilde over (x)}e(n)|), the complex predistorted signal resulting from multiplying the complex input signal {tilde over (x)}e (n) by the value Fj(|{tilde over (x)}e(n)|).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.