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.
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.
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.
若信号不进行滤波就抽取，信号将出现混叠，那么其关键问题就是抽取前的滤波。
If the signals are sampled before the filtering, the signals' spectrum will be aliasing. The filtering technology is a key issue before the sampling.
若信号不进行滤波就抽取，信号将出现混叠，那么其关键问题就是抽取前的滤波。
If the signals are sampled before the filtering, the signals' spectrum will be aliasing. The filtering technology is a key issue before the sampling.
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