Method and apparatus for calibrating the sideband rejection of a receiver
US7917091B2 · kind B2 · utility
6Cited by
16References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2007 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Jun 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/0085
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for calibrating In-phase and Quadrature imbalance within a receiver are described. A calibration process can inject a calibration tone to an RF or IF portion of a receiver. The receiver can frequency translate the tone to distinct I and Q calibration signals. The receiver upconverts the I and Q calibration signals to complementary sidebands or images using distinct and substantially matched upconverters. The complementary sidebands are mixed together to generate an error signal. The receiver determines a phase and amplitude correction based on the error signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.