CTCSS Recognition Method based on Goertzel Algorithm
Liu We · Communications technology · 2014
CTCSS is used as an identification signal to adjust whether the received signal need decode in the field of Radio communication. This paper introduces the application of Goertzel algorithm in extracting the CTCSS from the signal of interphones. Goertzel,with good effect in detecting single frequency,is a special DFT method. It could effectively reduce the cost of the whole system by greatly decreasing the calculation amount of CTCSS extraction. Compared with the traditional methods by using individual IC Identification or FFT,the method proposed in this paper is of fairly higher superiority,and thus is widely applied in production.