The final conclusion is: edge technique has high signal to noise ratio, small statistical errors, large measuring range in high accuracy, and can prevent back ground noise in some way.
结论是：边缘探测技术具有高信噪比，很小的测量误差，较大的高精度测量范围，并对背景噪声有一定的抵抗作用。
The effect of the back-ground noise is effectively rejected due to the bispectral technology.
由于采用了双谱技术，脑电背景噪声的影响得到有效的抑制。
Due to its low power spectral density, the direct sequence spread spectrum signal is always submerged with the back-ground noise, so that it is difficult to reconnoiter the signal.
直接序列扩频信号具有较低的功率谱密度，信号淹没在背景噪声中，侦查难度较大。
Due to its low power spectral density, the Direct Sequence Spread Spectrum signal (DSSS) is always submerged with the back-ground noise, so that it is difficult to reconnoiter the signal.
直接序列扩频信号具有较低的功率谱密度，信号淹没在背景噪声中，侦查难度较大。
Due to its low power spectral density, the Direct Sequence Spread Spectrum signal (DSSS) is always submerged with the back-ground noise, so that it is difficult to reconnoiter the signal.
直接序列扩频信号具有较低的功率谱密度，信号淹没在背景噪声中，侦查难度较大。
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