Radio channel squelching systems

Details Radio channel squelching systems Radio channel squelching systems

1995-11-22

1999-10-19

Le, Vu

Telecommunications

Receiver or analog modulated signal frequency converter

Squelch

455212, 455218, H04B 110

Patent

active

059703997

ABSTRACT:
Detection of in-band noise in a radio communications voice channel is provided by mixing a signal having a known frequency into a radio signal containing a voice channel signal in an in-band range, thereby translating the voice channel signal out of the in-band range. The in-band range is thereafter examined for the presence of noise signal energy whose presence can be indicative of in-band noise. Squelching of the voice channel is provided in the event that in-band noise energy exceeds a predetermined threshold.

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