PREVENTION OF TONE-CONTROL SIGNALING FALSE DETECT IN THE PRESENCE OF CONTINUOUS DIGITAL-CONTROLLED-SQUELCH-SYSTEM (CDCSS) SIGNALING
Original Publication Date: 1996-Aug-01
Included in the Prior Art Database: 2002-Apr-24
Modern wireless communications base stations often need to have the ability to detect Tone-Control signals and "Continuous Digital-Controlled-Squelch- System" (CDCSS) signals simultaneously. The prob- lem caused due to the simultaneous use of both sig- naling methods is that the CDCSS signals have frequency components which fall in the Tone-Control signal detection bandwidth. This results in a false indication of the presence of the Tone-Control sig- nal. The design approach outlined prevents the false detection of the Tone-Control signaling while CDCSS signaling is also present.