11/24/2002
 
 Noise: An Introduction
 
 
 
  
  
  
  
  
  
  
  
 Energy Spectral Density
 • Here the “Energy
 Spectral Density” is just the magnitude squared
 of the Fourier transform of n(t)
 • 
 • 
 • since all of the energy is concentrated at wn and each half of the energy
 is at ± w since the Fourier transform is based on the complex exponential not sine and cosine. 
 
  
  
   
   
   
   
   
   
   
   
   
   
   
   
  
  
  
 
  
 
  
  
  
   
   
   
  
   
   
   
  
   
   
   
  