Questions tagged [exam]
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How to solve this even symmetry question?
I have my DSP final soon and I have been reviewing some past exams. Here is a question from one of these exams:
Let x[n] be a real valued finite duration signal in n $\in [0,N]$. Another signal $x_1[...
user67157
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How to find the following DFT?
Let $x[n] = \cos(\frac{\pi}{8}n)$ and $X(k) = \text{DFT}_{16} \{ x[n]\}$
In order to find $X(k)$ I write out the DFT sum:
$$X(k) = \sum_{n=0}^{N-1} x[n] e^{-j2\pi kn/N} = \sum_{n=0}^{15} \cos(\frac{\...
user67157
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How to compute the 2N-Point DFT in terms of N-Point DFT with other properties involved
Let's say the N-Point DFT of $x[n]$ is $X(k)$.
Now from this question, I know how to compute the 2N-Point DFT of the same $x[n]$ in terms of $X(k)$
However, this idea doesn't translate well if I have ...
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Can anyone help with the properties of the DFT?
Let N be an even integer, and $x[n]$ be a finite length signal over the interval $n\in [0,N-1]$; let $X[k]$ be the N-pt DFT of $x[n]$.
Analytically find the DFT of each sequence below in terms of $X[k]...
user67157
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How to reconstruct a time-discrete signal
German: Sie betrachten das zeitkontinuierliche Signal $s(t)$ mit einem digitalen Oszilloskop mit Abtastperiode $T_\mathrm{s}$ und messen das zeitdiskrete Signal $\tilde{s}[n] = s(n\:T_s)$
Nehmen Sie ...
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what is the C/D equation in dsp?
I have one example test question by this kind:
So in this ebook (Digital Signal Processing Using MATLAB) as the DSP references and not found C/D block equations on it?
and this c/d search results?
...
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Is this calculation of inverse z-transform proper
I wonder whether my calculation of inverse z transform are correct. My IIR system is described as follows in Z-domain $H(z) = \frac{z^{-2}}{1-0.5z^{-2}}$
After using partial fraction decomposition I ...
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Calculating N-point DFT of a signal based on another signal's DFT
Recently I have asked this answer.
Now I would like to know a little bit more about expressing N-point DFT's of signals in terms of one another.
Having N-point DFT X(k) of a certain signal x(n), ...
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Calculating an output of a system (Z- transform question)
I have a following question to answer:
An LTI system is described by its impulse response h[n]. For input x[n] it gives output y[n].
$$h[n] = u(n) - u(n-N) $$
$$x[n] = u(n) - u(n-M)$$
I want to ...
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Expressing 2N point DFT in terms of N point DFT
I have a problem with expressing odd samples of X2 in terms of X1. I understand that the resulting DFT will be more precise in terms of expressing the exact spectrum of signal x[n], due to more ...
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