# question about power spectral density

Discussion in 'Homework Help' started by Maxwell2, Jan 10, 2012.

1. ### Maxwell2 Thread Starter New Member

Jan 10, 2012
2
0
Hi all,I don't know if it's the right place for this question but I hope you can help me

for the waveform in the picture f(t):

1-determine the mean square value in the time domain
2-find the PSD (assume 1 ohm) and sketch it.

2. ### Georacer Moderator

Nov 25, 2009
5,142
1,266
Hello and welcome to the AAC forums!

The Homework Help section rules ask that you post the work you have done so far so we can see it and find where you went wrong, or suggest better approaches. We will not do all your work for you, no matter how little time is left before it must be submitted.

If you are in doubt about how to structure your post and what to include please read this thread: http://forum.allaboutcircuits.com/showthread.php?t=3002

Thank you.

3. ### Maxwell2 Thread Starter New Member

Jan 10, 2012
2
0
Sorry for not reading the rules before starting new thread, the problem is I don't know what is
f(t) here , I don't think it's cosine because no -1, what f(t) could be?

Last edited: Jan 10, 2012
4. ### Georacer Moderator

Nov 25, 2009
5,142
1,266
What formulas do you have at hand?

Why don't you try the absolute value, f(t)=|5sin(t)|