Automatic gain control system and method with improved blocker performance
US10523251B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2018 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Oct 10, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03356
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communications receiver with improved blocker performance including multiple gain tables selected based on a number of reductions or back offs from a maximum coarse gain setting. A receiver chain with multiple gain stages converts a received signal to a digital format, determines the power level of the received signal, and provides an overload indication. A first gain table maximizes SNR and SNDR for weak blockers and at least one additional gain table successively improves SNDR for stronger blockers. An AGC circuit initially sets the coarse gain setting to maximum, and backs off a number of coarse gain steps until the receiver chain is not overloaded. The number of back off steps is used to select a gain table, the power level is used to select an entry in the selected table, and the selected entry includes gain settings for the gain stages of the receiver chain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.