以下为句子列表：
英文: A new envelope demodulation method based on empirical mode decomposition (EMD) is proposed to make up the limitation that meaningless frequencies often arise in the envelope spectrum of conventional envelope demodulation method.
中文: 摘要提出了一种新的调制信号解调分析技术，来抑制传统的包络解调方法中经常出现的无意义的频率成分。
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