Method and apparatus for receiving infrared signals with improved noise immunity
US6360090B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1999 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | Aug 25, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/123
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method and apparatus for receiving infrared signals that is better able to receive a data signal in the presence of a noise signal. The method according to the present invention involves bandwidth filtering an incoming signal that includes a data signal and a noise signal. The bandwidth filtered signal is then averaged to obtain an average alternating current (AC) value signal of the bandwidth filtered signal. The average AC value signal is integrated to obtain a detect level adjustment signal. The detect level adjustment signal is summed with a minimum detect threshold value to obtain a detection level signal. The incoming signal is then compared to the detection level signal in order to produce a received data signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.