Method and system for noise floor calibration and receive signal strength detection
US7245893B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2002 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Jul 16, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/345
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system for detecting the level of the noise floor due to circuit noise as seen at the ADC for a wireless receiver. The system measures power after digitizing and filtering, and subtracts off any variable gain used in the analog front end to determine differentially the size of the signal at the antenna. The system further differentially detects the signal size of any incoming signal at the antenna in a similar fashion, and determines its size relative to the measured noise floor. If the level of the circuit noise of the receiver is known absolutely, the absolute signal size of the incoming signal can likewise be determined with this inventive method and system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.