How to generate white noise spectrum graph?

How to generate white noise spectrum with power spectral density function =2.0 and the range of excitation frequency is 0.1-500Hz ?

Answer 1

[Koushik Kureti]

Hello Yong Ting Shen,

The White noise spectrum is plotted as given below:

You have given Power Spectral Density function = 2.0 and the range of excitation frequency is 0.1 – 500Hz.

Thus Sx(f) = 2.0 and range of f is 0.1 - 500 Hz and you can use the plot function to plot the white noise spectrum graph as given below

t = 0.1:1:500; 
plot(t,2,'*'); 

[YONG TING SHEN]

Is that possible change to FFT graph after this ploting ?