求翻译：从(7)式可以看出，a的特征值分布在信号子空间和噪声子空间是有差别的，因此本文采用文献[11]设计的检测量b来衡量信号的有无，即：是什么意思？

From (7) can be seen, a characteristic value distribution in the signal subspace and noise subspace there is a difference, so this paper [11] designed to detect the amount of b to measure whether the signal, namely:

( 7) can be seen from a distribution, a feature of the signal value-space and noise-space that there is a difference, and therefore this article [ 11] Design literature that was used in measuring B to measure signals in prosecutions, namely:

May see from (7) type, a characteristic value distributes in the signal subspace and the noise subspace has the difference, therefore whether there is this article does use the literature [11] design the examination to measure b to weigh the signal, namely:

(7) can be seen, eigenvalue distribution of a signal subspace noise subspace and differently, so this article [11] design b to measure signals with or without the amount of testing, that is:

Since (7) shows, eigenvalue distribution in signal subspace and of a noise subspace is differentiated, so this literature [11] designed for test b measured signals of no, namely: