# Questions tagged [continuous-signals]

A continuous signal or a continuous-time signal is a varying quantity (a signal) whose domain, which is often time, is a continuum.

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### How to design a digital Butterworth bandpass filter?

I am looking into designing a Bandpass Butterworth filter in python, but, I was not sure I am designing my filter correctly. What I have are the following: High cutoff frequency = 200Hz Low cutoff ...
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### How to design function for Random Decrement technique in python and implement the function?

I was looking into a technique called Random decrement technique from the following links/articles: How can I use Random Decrement Method to convert a non-stationary signal into a decay function ...
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### Doppler shift in signals

I have started doing some reading into the effects of the doppler shift on signals. In particular, radar signals from ships moving relative to a receiver. This might seem weird but I understand why ...
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### Fourier transform of $\textrm{sinc}^2(100\pi t)$

I'm confused about a tutorial problem concerning the Fourier transform of the $\textrm{sinc}^2$ function. Specifically, the question involves the Fourier transform of $\textrm{sinc}^2(100\pi t)$, ...
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### How are pole-zero plots, magnitude response plots, and phase response plots related?

Given that the Laplace transform of a continuous-time signal $h(t)$ is $H(s)$, what can a plot of the poles and zeros of $H(s)$ on the $s$-plane tell me about the magnitude response and phase response ...
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### Time Invariance of Continuous Time System

I am trying to check whether the system given by the following input-output relation is LSI or not? $$y(t) = \cos(x(t)-x(0))$$ My work: The given relation: $$y(t) = \cos(x(t)-x(0))$$ If the input ...
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### How to create an objective function for Mackey glass time series (using "bayesopt")?

I am optimizing 5 hyperparameters of Mackey-Glass time series and using built-in function "bayesopt" in MATLAB. My Mackey glass time series with fixed parameters shows correct results. ...
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### How can we translate this statement into an input signal expression?

I want to make sure if I got this right, the following statement: if the operator enters a unity sloped linearly increasing input then the output must eventually track the input and be at most 0.1 cm ...
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### Where is SNR and CNR calculated for LTE?

I read below that SNR and CNR are different and we have difference of post/pre modulation. In context of LTE which modulation do we refer to- Digital Data modulated using QAM/QPSK to IQ, or Baseband ...
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### Fourier Transform of $u(t)$ [duplicate]

I am just unable to find the correct Fourier transform of these signals (unit step, sine and cosine functions) which are containing delta functions in their Fourier transform. For unit step function, ...
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