Signal processing method for a walkie-talkie device
AssigneeConwise Technology Corporation Ltd.
InventorsJany-Yee Hsu, Chau-Kai Hsieh
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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.
Claims10
A signal processing method of a wireless communication device, the wireless communication device using a continuous tone-coded squelch system (CTCSS) for controlling transmission of signals, the wireless communication device comprising an analog-to-digital converter (ADC), a digital signal processor (DSP) electrically connected to the ADC, and a digital-to-analog converter (DAC) electrically connected to the DSP;
- the signal processing method comprising:
- using the ADC for converting a first analog communication signal into a first digital communication signal, the first digital communication signal in frequency domain having a plurality of processing signals, each processing signal corresponding to a predetermined frequency;
- using the DSP for processing a CTCSS tone signal corresponding to the first digital communication signal and generating a second digital communication signal;
- and
- using the DAC for converting the second digital communication signal into a second analog communication signal;
- wherein the wireless communication device uses the CTCSS tone signal to discriminate a required speech signal from other speech signals transmitted by the same physical communication channel.
Dependencies are inferred from the claim text.