Adaptive digital predistortion of complex modulated waveform using peak and RMS voltage feedback from the output of a power amplifier
US8384476B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2008 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Oct 13, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/435
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Exemplary embodiments of the invention includes an amplifier and a processor that adapts a baseline or previous model of the input-output signal characteristic of the amplifier using metrics of the system, including peak power, peak voltage, average power, root mean square (RMS) voltage, samples of the output signal of the amplifier, or environmental metrics such as temperature, power supply voltage, signal frequency, etc. In particular, the system comprises an amplifier; a device to measure a metric of the system; a processor to generate a present model of the input-output signal characteristic of the amplifier based on the system metric; and a predistortion device to predistort the input signal for the amplifier based on the present amplifier model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.