Quadrature modulator balancing system
US8913693B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 2, 2012 |
| Grant date | Dec 16, 2014 |
| Priority date | — |
| Expiry date | Mar 23, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/364
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of balancing a quadrature modulator includes exciting an in-phase input of the quadrature module and sweeping a phase of an injection signal through a range of degrees, and determining a plurality of in-phase DC components. The method further includes exciting a quadrature input of the quadrature module and sweeping a phase of the injection signal through the range of degrees, and determining a plurality of quadrature DC components. An in-phase sinusoidal equivalent of the plurality of in-phase DC components and a quadrature sinusoidal equivalent of the plurality of quadrature DC components may be determined. At least one correction factor that balances the quadrature modulator may be determined based on a comparison between the in-phase sinusoidal equivalent and the quadrature sinusoidal equivalent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.