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本文针对音频无绝缘轨道电路 ＡＳＫ信号的特点，提出了一种新的音频无绝缘轨道电路 ＡＳＫ信号解调算法－ＺＦＦＴ频谱解调算法，并基于ＴＭＳ３２０Ｃ３２设计了接收信号解调系统。实验结果表明该系统能可靠地解调ＡＳＫ信号，满足现场要求．
Aiming at the characteristics of ASK signal of audio uninsulated track circuit, this paper proposes a new demodulation algorithm of ASK signal for audio uninsulated track circuit-ZFFT spectrum demodulation algorithm, and designs a receive signal demodulation system based on TMS320C32. Experimental results show that the system can reliably demodulate ASK signal to meet the requirements of the site.