基于DSP的音频轨道电路接收解调算法的研究

Study of the Algorithm Based on DSP of Receiving and Demodulating Audio Track Circuit

提出了采用基于数字信号处理（ＤＳＰ）中的细化频谱分析（ＺｏｏｍＦＦＴ）技术接收并解调ＡＳＫ信号的方法，详细推导了载频与低频的解调算法。利用该方法解调音频轨道电路中所传输的列车检测信息和速度信息，计算机模拟实验证明满足接收的技术指标。

This paper brings up a method to receive and demodulate the ASK signal by ZFFT based on DSP technology and represents the algorithm for demodulating carrier and demodulating signal in detail . When it is applied to receive and demodulate the information of track detection and velocity transferred through audio track circuit, simulative experiment over computer shows that it satisfies Error Safety principle.