Narrow band disturbing wave detecting device

Details Narrow band disturbing wave detecting device Narrow band disturbing wave detecting device

1992-02-14

1992-09-15

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

375 1, H04B 1500

Patent

active

051484137

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.

REFERENCES:
patent: 5028101 (1991-07-01), Sugai et al.

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