高斯噪声的小波变换仍然是高斯分布的，它均匀分布在频率尺度空间的各部分，而信号则由于其带限制性，它的小波变换系数仅仅集中在频率尺度空间上的有限部分。-Wavelet transform of the Gaussian noise is still Gaussian distribution, it is uniformly distributed in various parts of the frequency scale space signal because its a restricti