... 信号晶体管 signal transistor 信号空间维数 dimensionality of signal space 信号滤波 signal filtering ...
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事实上，经过坐标变换，我们可以在维数更低的子空间（甚至是在平面上）来研究信号。
So one can study the signal in some much lower-dimensional subspaces, specifically, some planes.
最后，根据降秩技术中的交叉谱思想，提出了一种新的对信号子空间维数减少时的处理算法。
Finally, to deal with the situation that the dimension of the signal subspace decreases, a new algorithm is proposed based on the idea of the Cross Spectral Method.
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