Method and apparatus for reducing distortion
US6545535B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2001 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Sep 28, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3252
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A predistorter, a method for predistorting, and an amplifier include a predistorter. The predistorter is particularly suitable for predistorting an input signal of an amplifier, which amplifier introduces frequency dependent distortion that increase with the frequency. The predistorter makes use of a predistortion technique involving a high pass filter such that distortion, which compensates for the distortion introduced by the amplifier, is introduced in an output signal of the predistorter for the specific frequencies for which further distortion compensation is required. An advantage is that the predistorter allows the performance of an amplifier to be improved by reducing distortion and increasing linearity. Thereby the predistorter allows low power amplifiers with relaxed distortion requirements to be used as, for example, line drivers in many telecommunications systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.