Techniques for fast automatic gain control
US7353010B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2004 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | May 19, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3068
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An automatic gain control (AGC) technique can quickly sense signal size over a large dynamic range by using a peak detector block in the analog portion of the receiver. The peak detector block can compare a received signal to predetermined thresholds (chosen to divide a potential signal range into smaller ranges). Therefore, the peak detector block can assist the automatic gain control (AGC) in quickly sizing the received signal. The AGC technique can also reduce digital filter settling time by simulating a gain change and providing this simulated value to the digital filters of the receiver. DC or spur components can be estimated prior to and after performing an analog gain change and then removed from digital signal samples. The digital signal samples sampled prior to performing the analog gain change can then be rescaled and provided to the digital filter, thereby avoiding discontinuity in a digital signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.