Detection of frequency-modulated tones in electromagnetic signals
US6088144A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1996 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Sep 13, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/075
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for detecting a channel of a fiber-optic system. According to one embodiment, a filter is adapted to receive an electromagnetic signal resulting from modulation of a carrier frequency over a frequency range by a modulation signal. The filter has a plurality of transmissivity peaks over the frequency range, whereby the filter generates a plurality of intensity pulses as frequency of the electromagnetic signal varies over the frequency range. A detector is adapted to detect the modulation signal based on the plurality of intensity pulses. According to another embodiment, an electromagnetic signal corresponding to a channel and resulting from modulation of a carrier frequency over a frequency range by a modulation signal is received. A plurality of intensity pulses are generated as frequency of the electromagnetic signal varies over the frequency range, and the channel is detected in accordance with the intensity pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.