According to the characteristics of ut signal, this paper puts forward two ways of digital decoding: Time Domain Analysis and Frequency Domain Analysis.
根据UT信号的特征，从时域和频域角度提出了两种数字译码方法。
The decoding in time domain is shown be simpler in a binary system;
分析结果表明：在译二进制码时，时域算法的运算量较少、实现比较容易；
The decoding in time domain is shown be simpler in a binary system;
分析结果表明：在译二进制码时，时域算法的运算量较少、实现比较容易；
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