Questions tagged [averaging]
Averaging is a signal processing technique applied in the time domain, intended to increase the strength of a signal relative to noise that is obscuring it.
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Smoothing of Log Data Plots in Octave
I have some frequency based data that I'm plotting with Octave's semilogx that looks like this:
The amplitude of peaks does not increase with frequency over the linear scale. But with a log scale, ...
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is there upper limit on averaging window size for images?
An amateur question. I take an image and average pixels over a window 3 by 3, thus obtaining a smoother image. Then I increase the averaging window size - obtain an image with even less details, but ...
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Bit accuracy improvement versus sample averaging
Supposing we have multiple samples of a scaled signal $x$ given by $y_i=a_ix+n_i$ where $n_i$ is AWGN how does the bit accuracy of estimation of $x$ improve with averaging of samples $y_i$ (number of ...
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Power spectral density of melodic contours
DESCRIPTION OF SIGNALS
I have several sung melodies under each of nine experimental contexts ("conditions"). The melodies are all of slightly different lengths (ranging more or less from 3s ...
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Artefactual results in the Welch PSD (FFT) of melodic contours (pitch profiles)
DESCRIPTION OF SIGNALS
I have several sung melodies under each of nine conditions. The melodies are all of slightly different lengths (ranging more or less from 3s to 12s), and each is encoded as a ...
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Get shape of a recurring pulse event in my plant video signal
I'm studying plants - specifically how the color of their leaves change throughout a day. I have a camera pointing at a leaf which takes a picture every 47 minutes and calculates the average green ...
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How to deal with noise near saturation
If I have a noisy signal which I know is approaching the saturation limit of my sensor, then the measurement will sometimes be saturated. It seems that if I try to estimate the true data by averaging ...
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Lower bound of weighted average of sequence
Can anyone prove that
$$\mathrm{avg}\left(\frac {a_i}{\left(1+a_i\right)^2}\right) \ge \frac{\mathrm {avg}({a_i})}{\left(1+\mathrm{avg}{(a_i)}\right)^2}$$
for a sequence of positive valued elements $...
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Recoverable continuous function after average sampling
I have a personal interest in this question, but I don't know if it is unfounded.
Suppose I have a continuous function x (t), which is sampled using an average sliding window, which performs a ...
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