Method of influencing an input signal and predistorter
US7202737B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2004 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | Jul 23, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3294
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method of influencing an input signal (x), in particular an input signal of a power amplifier of a wireless communication system, wherein said input signal (x) has a range of input amplitudes (r0, . . . , rM−1), wherein a correction signal (Γ(x)) depending on said input signal (x) is generated, and wherein said input signal (x) is influenced depending on said correction signal (Γ(x)).A generation of said correction signal (Γ(x)) is based on a plurality of base functions (φ1, φ2, . . . , φN−1), and said range of input amplitudes (r0, . . . , rM−1) is divided into intervals (r0,r1),(r1,r2), . . . ,(rM−2,rM−1), wherein each of said base functions (φ1, φ2, . . . , φN−1) contributes to said correction signal (Γ(x)) in a limited number of intervals ((r0,r1),(r1,r2), . . . ,(rM−2,rM−1)). Thus it is possible to change parts of the correction signal by adapting some of said base functions without influencing the whole correction signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.