Questions tagged [signal-processing]
The subfield of electrical engineering that focusses on analysing, modifying, and synthesizing signals such as sound, images, and scientific measurements.
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Is there a graphical summary of which modulation technique to use in communication systems using Visible Light Communication techniques?
I am currently looking at various papers written (some listed at the bottom) that discuss how laser pulses can be modulated to send encoded messages to a receiver for communication systems. The more I ...
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Photo Multiplier Tube (PMT) and charge sensitive pre-amplifier
I have an H7195 assembly type Photo Multiplier Tube (PMT) used to be tested for single photon measurement. I would like to use the dynode output to check the spectrum by connecting to a charge ...
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Fourier Coefficients
Suppose i've a two voice samples v1 and v2. Comparatively voice v1 is louder than the v2. If both the voice is spoken by the same person.(Spoken normally as he speaks)
Is it good to state the ...
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Fraunhofer diffraction problem in Python: How to interpret discrete Fourier transform (DFT) spectrum?
I have a periodic phase grating consisting of lenslets along the x-direction, invariant in y. I want to use python to calculate the far-field (Fraunhofer) diffraction pattern that one gets when ...
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Multilateration of Sound in 3D Space
TL:DR - How can you find the 3D coordinates of a emitter than transmits an impulse signal?
STORY:
I'm working on something to improve my bird-watching. I've got a camera that can take pictures of ...
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How to convert a wave from Amplitude time to Amplitude Frequency domain? Regarding Gravitational waves strain data
I have read that on applying FFT on gravitational wave strain we can bring Amplitude time domain to Amplitude-frequency domain. But when I apply this conversion on the data I had I get this curve
I'...
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Linear transformation of real and analytic signal
Suppose you have one real-valued signal $s(t)$ and another the real-valued signal $r(t)$ related to $s(t)$ by a linear integral transformation with a real kernel $k$ such that $r(t) = \int dt'\, k(t-t'...
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Is there a Bayesian theory of deterministic signal? Prequel and motivation for my previous question
This is a prequel to my question:
What's the probability distribution of a deterministic signal or how to marginalize dynamical systems?
Clearly my question looks at the same time fairly ...
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What's the probability distribution of a deterministic signal or how to marginalize dynamical systems?
In many signal processing calculations, the (prior) probability distribution of the theoretical signal (not the signal + noise) is required.
In random signal theory, this distribution is typically a ...
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Discrete Fourier transform for periodic signal?
From the Signal and System textbook, by Oppenheim, I learned that the discrete-time Fourier transform can be written as
$$
x[n]=\frac{1}{2\pi}\int_{2\pi}X(e^{j\omega})e^{j\omega n}d\omega
$$
$$
X(e^{...
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Can anybody explain about phase shift and phase spectrum terms in case of multidimensional signal?
I know about phase of a 1D signal, but when I move into higher dimensions like 2D or 3D etc, it becomes headache to grasp the concept.
What do the terms "phase shift" and "phase spectrum" mean in ...
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What is the concept of phase congruency?
I am beginner in signal processing. I am studying the importance of phase in signals. I want to know about Phase
Congruency, but there is very little
information available on internet.
So can anybody ...
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Why can't we use the Neyman-Pearson likelihood ratio directly?
If you have a bunch of events and would like to choose a cut to distinguish background and signal, you can take the likelihood ratio
$$
\lambda(\vec x) = \frac{f(\vec x| s)}{f(\vec x| b)}
$$
and the ...
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Spatial Resolution in Magnetocardiography
In the science paper called Development of an optical cardio-magnetometer by George Bison, it is mentioned that spatial resolution of 10-20mm is required for mapping MCG signal(page 52). What does the ...
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Application of wavelets in computational electromagnetics
I am a first-year graduate student (electrical eng.); wavelets is one of the courses that I am taking presently. As part of the course, I plan to explore application of wavelets in computational ...