Communication system with frequency-adaptive predistorter design
US8000661B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2008 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Jan 8, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0425
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication system comprises a predistorter for distorting an input signal according to at least one parameter to generate a distorted signal, an amplifier for amplifying the distorted signal according to an input-output characteristic to generate an output signal, and a frequency-domain adaptive calibration module for adaptively adjusting the parameter of the predistorter according to a frequency characteristic of the output signal. Because the calibration is performed in the frequency domain, there is no need to precisely estimate the group delay formed by the feedback path. The system complexity is therefore reduced without loss of performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.