Questions tagged [sampling]
In signal processing, sampling is the reduction of a continuous-domain signal to a discrete-domain signal.
1,171 questions
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Orthogonality of Finite Samples of a Function and Its Delayed Version
Consider a band limited function $f(x)$ in $L_2(\mathbb{R})$ with frequency support in $[-B,B]$ . For small delays $\delta$ it is straightforward to show that $f(x)$ and $f(x+\delta)$ are not ...
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Why sampling in frequency domain generates sidebands although those frequencies are not present in signal?
The frequency domain of a signal provides information of all the frequencies that makes up that signal. I am reading about sampling, and I want to understand why sidebands(copies of original spectrum) ...
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Why does an LTI system not change a signal's sample rate?
I am taking a DSP course, and I want to understand the motivation behind a definition: $x(t)$ is sampled by C/D at time intervals of $T_s$. We get the sampled signal $x[n]$ and it is fed into a ...
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Autocorrelation via FFT
I read through a lot of the already existing posts about autocorrelation via FFT on this forum and elsewhere but I am still confused. Also, I am still not sure whether this is the right place to ask ...
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HackRF One with gnss-sdr: optimal sampling rate and band-pass filter
I am receiving GPS L1 C/A signal using HackRF One together with gnss-sdr program and trying to set optimal parameters. My ...
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Bandpass Sampling Conditions Derivation
I’m taking a DSP course, and we covered bandpass sampling (undersampling). I’d like a rigorous derivation of the minimal sampling frequency $f_s$ and the corresponding constraints on the band edges $\...
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Converting between unit sampling train and discrete sampling
To discretize the impulse train sampling of a function ($x_p(t) = x(t)\sum_{n=-\infty}^{\infty} \delta(t-nT) $) we use $ x_d[n] = x_p(nT) = x(nT) $ (example: slide 7 of https://ocw.mit.edu/courses/res-...
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Using weighted fill pulses in pulse radar
In the context of pulse radars, I'm wondering exactly why and how so-called "fill pulses" are used. I understand having $N$ fill pulses allow operators to retrieve $N$ echoes within the ...
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