针对在经验模态分解(EMD)筛选过程中间断信号引起的模态混叠问题，提出了一种新的解决方法。

Aiming at the mode mixing problem caused by intermittency signal in the sifting process of empirical mode decomposition (EMD), a new solution is presented.

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卷积混叠的盲信号分离是盲源分离问题中的难点。

The blind separation of convolution mixture signals is a nodus in blind source separation.

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在数字正交采样中，带通信号存在频谱迁移问题，虽然满足带通信号的采样定理，仍可能产生频谱混叠。

For bandpass signal under digital quadrature sampling, there is spectrum shifting. Although the sampling frequency satisfies the sampling theorem, it may cause spectrum aliasing.

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