当这些标签暴露在无线电信号下时，它们将利用信号的能量发回其所包含的信息，这些信息大部分是用于识别物品的一长串数字。
When exposed to a radio signal, they use its energy to send back the information they contain, mostly a long number identifying an object.
实验结果表明，该调制识别方法在小样本下具有较高的识别率，可以应用在数字信号的调制识别系统中。
The experiment results justify the high recognition rate with less samples, thus the method can be used in the digital signal modulation recognition system.
数字调制方式的识别对于通信信号分析有着重要的作用。
Identification of digital modulation schemes plays an important role in signal analysis.
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