An integrated uplink-signal detection method of railway balise system based on wavelet ridge

With the use of continuous complex wavelet transform, the paper introduces a new integrated uplink-signal detection method of the railway balise system based on wavelet ridge in accordance with the practical application needs of railway system and the characteristics of the uplink-signal. The method extracts the wavelet ridge and estimates the upper and lower side frequency by the use of continuous complex wavelet transform, and demodulates the signal according to the changes of the upper and lower side frequency, then calculates the carrier frequency and frequency deviation based on the estimated value of the upper and lower side frequency, and ultimately achieves the goal of detecting the uplink-signal. Experimental results show that the method is simpler and more accurate compared with other algorithms and has strong anti-interference ability to meet the detection requirements of railway balise uplink-signal.