信道随机噪声及频破特性仿真： 编程实现如下噪声频谱特性：高斯噪声、均匀噪声、自相关函数与谱密度的关系-Random noise, channel frequency and breaking characteristics simulation: programming noise spectrum characteristics as follows: Gaussian noise, uniform noise, the autocorrelation function and the relationship of the spectral density of the