Signal processing method for a walkie-talkie device

Details Signal processing method for a walkie-talkie device Signal processing method for a walkie-talkie device

2006-07-04

2006-07-04

Milord, Marceau (Department: 2682)

Telecommunications

Transmitter and receiver at same station

Having particular configuration of a transceiver

C455S041200, C455S011100, C455S563000, C455S552100, C340S573100, C340S539100, C340S573400

Reexamination Certificate

active

07072622

ABSTRACT:
A walkie-talkie device applies a continuous tone-coded squelch system (CTCSS) to control signal transmission. The walkie-talkie device has an analog-to-digital converter, a digital signal processor, and a digital-to-analog converter. The signal processing method includes using the analog-to-digital converter to convert a first analog signal into a first digital signal, using the digital signal processor to handle a CTCSS tone related to the first digital signal for generating a second digital signal, and using the digital-to-analog converter to convert the second digital signal into a second analog signal. The walkie-talkie device uses the CTCSS tone to discriminate a required speech signal from other speech signals transmitted by the same physical channel.

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