How to generate white noise with certain power spectral density using wgn function?

wgn function has three arguments: wgn(m,n,power)

If I want to generate a white noise time series with power spectral density S0, whould I set "power" equal to S0?

Many thanks

Answer 1

[Ashutosh Singh Baghel]

Hi Wei,

I understand you wish to generate white noise samples in volts. This can be done using 'wgn' function.

m = 1000;               % Number of white Gaussian noise samples 
n = 1;                  % Number of channels desired
power = -6;             % Power of noise samples
wgnoise = wgn(m,n,power);  
var(wgnoise)

ans = 0.2573

Power of noise samples, is specified as a scalar. The default unit for power is dBW.

Please refer to MATLAB Documentation link of 'wgn(m,n,power)' function.