-3
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Hey guys, what is the difference between b.) and c.)? Why do we need each of them?

Excrept from: http://www.dspguide.com/ch8/5.htm (scroll below)

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Why did you cut off the explanation on the figure?

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Equation 8-2:

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  • $\begingroup$ k, it doesnt say what is the role of b and c in dft $\endgroup$ – WantIt Apr 28 '13 at 3:05
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    $\begingroup$ What don't you understand about the text "Figure (b) shows the real part of the frequency domain of this signal" ? What don't you understand about "Figure (c) shows the amplitudes of the cosine waves needed to construct (a) using Eq. 8-2" ? It's not clear what you're asking, or even why you're asking it given the clarity of the explanations of the source of your image. $\endgroup$ – Peter K. Apr 28 '13 at 13:38

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