What Is the Signal's Form and Duration from Its Complex Power Spectral Density?

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The discussion revolves around the complex power spectral density given by S(jw)=(1/(w*(w^2+a^2))*e^j90, with participants seeking to determine the signal's form and duration. There is a request for assistance in solving the problem, indicating a lack of familiarity with complex power spectral density. One user has attempted calculations but has not provided a clear solution. The conversation highlights the challenge of understanding and applying concepts related to spectral density in signal processing. The thread emphasizes the need for further clarification and guidance on this topic.
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Homework Statement



"The complex power spectral density is :

S(jw)=(1/(w*(w^2+a^2))*e^j90

Find the form and duration of the signal."

Homework Equations


Any ideas on how to solve this ?[/B]

The Attempt at a Solution


What I've managed to calculate so far is:
http://tinypic.com/r/zydamr/9
 

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Never heard of a complex power spectral density.
 

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