SQUELCH DETECTOR

A communication device (100) having a receiver (106) and an audio output device (116) is provided. The communication device (100) includes a digital signal processor DSP (110) for measuring the level of signal energy in a first segment of the frequency spectrum of the received signal to dynamically...

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Bibliographische Detailangaben
Hauptverfasser:	GHOMESHI, MANSOUR, WONG, CHIN, PAN, SIMMONS, JOHN, W
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CONTROL OF AMPLIFICATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	A communication device (100) having a receiver (106) and an audio output device (116) is provided. The communication device (100) includes a digital signal processor DSP (110) for measuring the level of signal energy in a first segment of the frequency spectrum of the received signal to dynamically establish a squelch threshold. The DSP (110) is also used to measure the level of signal energy in a second segment of the frequency spectrum of the received signal. The communication device (100) also includes audio gates (114). The audio gates (114) provides for the unmuting of the audio output device (116) when the signal energy contained in the second segment of the frequency spectrum of the received signal is below the squelch threshold.