Dynamic automatic gain control circuit employing kalman filtering
US6766153B2 · kind B2 · utility
14Cited by
37References
56Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2001 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Nov 16, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/185
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A novel and useful apparatus for and method of automatic gain control (AGC) using Kalman filtering and hysteresis. A nonlinear, time-variant loop filter such as a Kalman filter is employed in the feedback loop of an AGC circuit. The circuit is able to transition quickly and make fast adaptations to new levels of the input signal by use of a restart mechanism used to dynamically modify the gain of the loop filter thus enabling the AGC circuit to quickly adapt to changes in the signal level of the input. An AGC circuit incorporating a hysteresis circuit in the feedback loop is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.