Power amplifier bias synchronization
US7602244B1 · kind B1 · utility
29Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2007 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Jan 15, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/367
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power amplifier system includes a nonlinear power amplifier that receives a predistorted input signal. A receiver receives an output signal from the power amplifier and provides an observed signal. A bias controller provides a delayed dynamic bias signal to the power amplifier wherein the bias signal delay is dynamic and is a function of the observed signal for synchronizing the predistorted input signal with the dynamic bias signal. A method is also described that alternately adjusts predistortion delays and bias signal delays as a function of observed signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.