Automatic gain control for a wireless receiver
US8605836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2006 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Nov 25, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2614
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Techniques for performing automatic gain control (AGC) at a wireless receiver are described. The total gain for the wireless receiver is achieved with discrete gain steps for analog circuitry and continuous gain for a digital variable gain amplifier (DVGA). An AGC loop is updated based on power measurements for an output signal from the DVGA. A first gain for the analog circuitry is selected from among multiple discrete gain values based on the AGC loop to maintain the average power of a baseband signal within a predetermined range at an analog-to-digital converter (ADC) input. A second gain for the DVGA is selected based on the AGC loop to maintain the average power of the output signal at a reference power level. The first gain is switched in a manner to avoid saturation of the ADC caused by the baseband signal and to provide switching hysteresis. The AGC may be performed in log domain and with multiple modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.