Power amplifier time-delay invariant predistortion methods and apparatus
US8380143B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2008 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Jan 28, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0425
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An embodiment of the invention is a time-delay invariant predistortion approach to linearize power amplifiers in wireless RF transmitters. The predistortion architecture is based on the stored-compensation or memory-compensation principle by using a combined time-delay addressing method, and therefore, the architecture has an intrinsic, self-calibrating time-delay compensation function. The predistortion architecture only uses a lookup table to conduct both the correction of non-linear responses of a power amplifier and the compensation of any time-delay effects presented in the same system. Due to the time-delay invariant characteristic, the predistortion design has a wider dynamic range processing advantage for wireless RF signals, and therefore can be implemented in multi-carrier and multi-channel wireless systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.