Narrow band disturbing wave detecting device
US5148413A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1992 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Feb 14, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/7101
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A device according to the present invention comprises a variable notch filter, a PN code generator, a VCO and a convolver. The frequency is swept within the band of the convolver by the VCO after having stopped operations of the variable notch filter and the PN code generator and the output of the convolver at this time is detected. When the output thus detected exceeds a threshold, a detected signal is sent to the variable notch filter to control the notch part thereof so as to correspond to disturbing wave to remove the disturbing wave from a received signal. Since the convolver is used not only for a correlator but also for a disturbing wave detector, the construction can be simple and cheap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.