IQ-modulator pre-distortion
US8045642B2 · kind B2 · utility
4Cited by
2References
3Claims
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Key dates
| Filing date | Feb 24, 2005 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | Feb 5, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/364
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An IQ-modulator pre-distorter includes means for pre-distorting each IQ-vector by a 2-dimensional linear transformation that depends on the value of the IQ-vector to be pre-distorted. The transformation is based on polynomials in the I- and Q-components. In a preferred embodiment the transformation is based on a 2×2 dimensional lookup table matrix, the elements (T11, T12, T21, T22) of which are sampled polynomials in the I- and Q-components of the IQ-vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.