Patent ID: 9119004
Filing Date: 2015-08-25
Classification: H04B,H04R

Abstract:
1. A wireless device for detecting a tone squelch signal contained in received baseband signals, comprising: a frequency shifting unit which shifts a frequency of the received baseband signal in a negative frequency direction by a preset frequency of the tone squelch signal; a LPF which removes unnecessary frequency components from an output of the frequency shifting unit; an assessment unit which assesses a presence or absence of the tone squelch signal based on an output of the LPF; a frequency detection unit which detects a frequency based on the output of the LPF; and a power detection unit which detects a power of the output of the LPF, wherein the assessment unit assesses that the tone squelch signal is present if the detected frequency is within a predetermined frequency range, and the detected power is equal to or greater than a predetermined power.