Type-based baseband predistorter function estimation technique for non-linear circuits
US6885241B2 · kind B2 · utility
52Cited by
17References
38Claims
0Family size
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Key dates
| Filing date | Mar 26, 2003 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Mar 26, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/102
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
This invention is about a novel estimation technique for generating a predistortion function to compensate for the AM-AM and AM-PM non-linear conversion distortions of non-linear power amplifiers or non-linear circuits. Based on the cumulative type of power amplifier output envelope, a non-parametric baseband predistortion function is derived. The non-parametric approach avoids any model mismatch. In addition, the technique does not need to demodulate the input signal. Furthermore, it minimizes the effect of the power amplifier non-linearity and significantly improves the system performance
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.