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Convolution and DTFT

where $0 ≤ n ≤ N-1$

1)The linear convolution of the signal gives a triangle how you write it in mathematical form?

The DTFT of the signal is given as

$X_1(e^{jw})=X_2(e^{jw})=\pi \sum_{k=-\infty}^\infty \delta(w-2\pi k)+$$ \frac1 {1-e^{jw}}$

How to calculate the $ DTFT^-(X_1(e^{jw}).X_2(e^{jw})?$

  • $\begingroup$ Duplicate of this previous question with the edits requested there included in this new one. $\endgroup$ – Dilip Sarwate Dec 8 '12 at 16:18
  • $\begingroup$ @heavenhitman Please edit your original question rather than creating a new one. $\endgroup$ – datageist Dec 8 '12 at 16:22