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newbie question to DSP and frequency domain

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echoangel9111

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Hello,

I see some textbook representation of frequency using X(jw) and some other cases X(w). Can someone clarify this
 

Jack// ani

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Well...jw is complex/imaginary freq term whereas w is real one!!
 

claudiocamera

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I trully believe that it is a question of notation, try to figure out if the both representantion regards to the frequency domain of the signal ( Its fourier representation) if so, dont worry about each author choose his way to present the subject.
 

weng

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I think X(jw) consists of only imaginary freq term wheras X(w) may consist of both real and imaginary elements.
 

MSGHP

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X(jw) is the frequency response of x(t). X(w) can be the same or it might be simple notatin of X(e^jw) that is the frequency response of x[n] ( discrete time signal).
 
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