
#1
Sep113, 09:17 AM

P: 11

Can somebody tell me exactly what is 'S' in frequency domain?
I know that s=σ+jw where σ is neper frequency and jw is complex frequency but i want the precise information on s you can suggest me a book in which it is clearly explained. Thank you. 



#2
Sep113, 11:28 AM

P: 71

Reading the wiki page may give you some information, http://en.wikipedia.org/wiki/S_plane




#3
Sep113, 07:14 PM

P: 976

This is the way I think of it, but I may be completely wrong. Think of s as having a magnitude and phase (when expressed exponentially). If you express that rectangularly it can be seen as the sum of two orthogonal components. Call them what you will. One is the cosine component and the other is the sine component. I view complex numbers this way since the rectangular components are often difficult to visualize. Writing a polynomial with s and t allows you to express sine and cosine components that vary in time. Or, said another way, frequency and phase varying in time. If I said this incorrectly, we will soon find out :)



Register to reply 
Related Discussions  
Frequency domain vs time domain solution of PDEs  Differential Equations  0  
(signal processing)Time domain vs Frequency domain, totally confused!  Electrical Engineering  8  
Tension on a capacitor from Laplace domain to time domain.  Engineering, Comp Sci, & Technology Homework  4  
fatigue analysis:frequency domain vs time domain  Mechanical Engineering  11  
Time Domain Functions to Frequency Domain  Engineering, Comp Sci, & Technology Homework  4 