Real-time I/Q imbalance correction for wide-band RF receiver
US10050744B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2013 |
| Grant date | Aug 14, 2018 |
| Priority date | — |
| Expiry date | May 23, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0062
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A receiver apparatus models and corrects the frequency-dependent and the frequency-independent mismatches between I and Q paths jointly by polynomial estimations. The receiver apparatus may sample digitized I and Q path signals. The sampled data point may be modeled in equations with real and imaginary components. The sampled discrete time-domain data may be converted to frequency-domain data. Multiple statistics values based on the frequency-domain data may be computed. Coefficients for the polynomial equations may be estimated based on the computed statistic values. The channel mismatches may be estimated from the polynomial equations and used to compensate the mismatch either on the I path or the Q path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.