Signal quality indicator apparatus and method particularly useful for mobile telephones
US7606543B1 · kind B1 · utility
9Cited by
15References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1999 |
| Grant date | Oct 20, 2009 |
| Priority date | — |
| Expiry date | Jun 26, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The quality of radio frequency signals received at a mobile phone or cellphone is sampled. The results are employed to produce a human discernible indication such as by blinking a received signal strength bar on a display. The bar remains constant without blinking if the signal quality is at or below a preselected minimum and can have the blinking rate increase as the sensed signal quality decreases. Distortion can be determined in either the digital or analog mode. Digital signal quality can be reflected in the sensed bit error rate while the level of analog signal quality can be determined from the supervisory audio tone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.