System and method quadrature error detection and correction
US9350487B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2014 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | May 2, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/3912
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In an example, there is disclosed a system and method for detecting and correcting error in a quadrature receiver (QR). The QR may include a receiver channel operable to divide a received RF signal into I and Q channels. The receiver channel may include error sources, such as (in sequence) pre-demodulation (PD) error, LO mixer error, and baseband (BB) error. Test tones may be driven on the receiver channel at a plurality of test frequencies, and a quadrature error corrector may be provided to detect error from each source. Upon receiving an RF signal, the quadrature error corrector may apply correction coefficients to correct each source of error in reverse sequence (BB, LO, PD).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.