Digital correction of analog polyphase filters
US8442171B2 · kind B2 · utility
2Cited by
2References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2011 |
| Grant date | May 14, 2013 |
| Priority date | — |
| Expiry date | Sep 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0016
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present invention provide systems, devices and methods for modeling and correcting amplitude and quadrature phase errors generated within analog components of a receiver. A frequency-dependent correction method is employed that closely tracks the frequency dependent nature of the mismatch between the I and Q polyphase filter responses. In particular, digital correction is performed on a signal based on a modeled error function generated during a calibration of the receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.