Distortion compensation apparatus and distortion compensation method
US9337783B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2014 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Nov 24, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0425
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A distortion compensation apparatus includes: a storage unit that stores a distortion compensation coefficient; a distortion-compensation-coefficient selecting unit that takes a logarithm of power of an input signal and exponentiates a value obtained by taking the logarithm, and that selects a distortion compensation coefficient that is stored in the storage unit according to a value obtained by the exponentiating; a distortion-compensation processing unit that acquires the selected distortion compensation coefficient from the storage unit, and that performs distortion compensation processing on the input signal to the distortion-compensation-coefficient selecting unit using the acquired distortion compensation coefficient; an amplifier that amplifies the signal subjected to the distortion compensation processing; and a distortion-compensation-coefficient updating unit that updates the distortion compensation coefficient stored in the storage unit based on the amplified signal and the input signal to the distortion-compensation-coefficient selecting unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.