Radio channel squelching systems

Details Radio channel squelching systems Radio channel squelching systems

H - Electricity

03

G

H03G 3/34 (2006.01) H04B 1/10 (2006.01) H04Q 7/30 (2006.01)

Patent

CA 2238191

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.

Le bruit intérieur à la bande passante d'un canal vocal de système de télécommunications peut être détecté par mélange d'un signal de fréquence connue à un signal radio contenant un canal vocal intérieur à la bande passante pour faire sortir ledit signal vocal de la bande passante. La plage de la bande passante est alors explorée de façon que soit détectée la présence d'énergie de bruits qui peut être révélatrice de bruits intérieurs à la bande passante. Si l'énergie de bruits détectée dépasse un seuil donné, on procède à un amortissement du canal vocal.

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