System and method for digital autonomous automatic gain control (AGC) for DVB-H receivers
US7676207B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2006 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | Jul 15, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/64315
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Digital autonomous AGC for a DVB-H receiver comprises detecting a plurality of RF signals entering a LNA in the DVB-H receiver; detecting a RF transmitter blocker signal occurring at the LNA; and differentiating between a desired RF signal and an undesired RF transmitter blocker signal by varying a differential gain of current through the LNA. A RF servo loop is used for detecting the RF transmitter blocker signal. Logic circuitry of the RF servo loop is integrated with a baseband AGC loop to step control the differential gain of current through the LNA. A RF wideband detector is used for detecting the plurality of RF signals entering the LNA; and sending a voltage output corresponding to voltage levels of the RF signals to a plurality of comparators, wherein each of the plurality of comparators are set at a different programmable voltage threshold level compared with one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.