Methods and systems to compensate IQ imbalance in wideband zero-if tuners
US8385457B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2009 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Oct 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0024
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and systems to compensate IQ imbalances in a tuner system, including relatively wideband ZIF tuner systems and tuner systems having substantially linear frequency dependent phase imbalance, where a one-tap compensation element may be utilized to compensate frequency dependent phase imbalance. A two tone probe may be applied in controlled loop-back modes, and resultant baseband components may be used to determine a straight line from which to determine compensation. The probe may include a Multi-Media over Coax Alliance (MoCA) Type 2 probe. Compensation parameters may be determined as fixed or non-adaptive compensation parameters in a digital domain and may be applied at baseband. One or more compensation values may be determined in a fixed point circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.