Patent ID: 7072622
Filing Date: 2006-07-04
Classification: H04B

Abstract:
1. 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.