DC offset estimation and compensaton for wideband systems
US8953716B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2012 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Dec 27, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/061
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems, methods, and other embodiments associated with a DC notch gear filter are described. According to one embodiment, an apparatus includes a digital high pass filter having a cutoff frequency and a gear mechanism configured to successively change the cutoff frequency of the high pass filter based on a sequence of cutoff frequencies. The apparatus also includes a direct current (DC) estimator configured to estimate a DC offset of a digital input signal to the high pass filter based, at least in part, on an output signal of the high pass filter as a cutoff frequency is successively changed. A direct current (DC) compensator is configured to subtract the estimated DC offset from the input signal to the high pass filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.