And as the spectrum of the discrete time sign, this identical spectrum will periodically repeat if we prolonged the frequency greater past $f_s$ these which the spectrum demonstrated is additionally the identical spectrum in each frequency band from $nf_s$ to $(n+one)f_s$ for any integer $n$. 知乎,让每一次点击都充满意义 —— 欢迎来到知乎,发现问题背后的世界。 There is https://boyspgingurgaonsector14.blogspot.com/