Questions tagged [noise]
In signal processing noise can be considered random unwanted data without meaning.
1,304 questions
0 votes
5 answers
155 views
Why isn't a Dirac pulse considered white noise?
It is probably a basic question, but why isn't a Dirac pulse considered white noise ? To be fair, I intuitively wouldn't consider it as such, but the defining characteristic of white noise is that the ...
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1 vote
1 answer
86 views
Can I generate a high pass filtered noise signal by means of combining white noise signals with time-varying gain?
I have 2 or more sampled white noise signals $S_1, S_2 \ldots S_x$ and want to combine them via $$ S(n) = a_1(n)S_1(n) + a_2(n)S_2(n) + ... + a_x(n)S_x(n) $$ such that $S$ has a colored noise spectrum,...
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0 votes
0 answers
62 views
Finding the total output mean square noise for RC-biquad filter
I am trying to find the total output mean sqaure noise for the circuit below: I started with finding the Transfer function of the filter to get the value of $\omega_0$ & Quality factor Q which I ...
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0 votes
0 answers
63 views
How to detect the envelope effect with a noisy signal?
I measured the following signal: Also, I measured the noise of the oscilloscope and the two electrodes, I used to the measurements: Oscilloscope noise: Measurement electrode noise: The output ...
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2 votes
0 answers
52 views
How to compare noise between two RGB images using KL divergence or other similarity metrics?
I have two RGB images that represent noise, and their shape is [H, W, 3] (height, width, 3 color channels). I want to compare how similar the noise distributions are between the two images. My ...
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4 votes
1 answer
144 views
Generating blue noise with values sampled from a log normal distribution
Aim I am trying to generate random signals with the following two properties: The values should be approximately log-normally distributed (any long-tailed distribution bounded form below with non-...
1 vote
1 answer
56 views
How to remove spurious data points recorded in a measurement? How to improve the result obtained using a Savitzky-Golay filter?
The following two figures show raw data and filtered data recorded in a measurement. I have used SciPy's Savizky-Golay filter with window_length = 6 and polyorder of 3 to obtain the second plot. One ...
2 votes
3 answers
201 views
Modeling pink noise as Gaussian random variable
I am trying to model a $1/f$ or pink noise source that is corrupting a control parameter, let's name it $J$. In this scenario, the control parameter $J$ should be applied for a certain time, $t$, ...
0 votes
1 answer
164 views
ENBW (Equivalent Noise Bandwidth) vs Effective Bandwidth
I am working with a radiometer system (Gaussian noise input), which I digitally filter. The question is: how can I compute the bandwidth of that filter so that I can use it the classical noise ...
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0 votes
1 answer
46 views
Voltage reference 1/f noise test board
I took over a project for measuring the $1/f$ noise of multiple voltage references where I need some guidance in implementing the (DSP) software. The hardware is already available. $20$ voltage ...
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0 votes
0 answers
48 views
I have a signal dataset, which is very noisy and i am not able to understand how to move forward with noise removal techniques
Iam not a DSP expert just a beginner. I already implemented moving average but its not giving good results. I have also tried derivative filter in this format $$ y_{3} \! \left( n \right) = 2 T_{1} \...
0 votes
1 answer
74 views
Implications of adding gaussian noise after denoising original signal
I'm new to DSP due to a research project related with audio classification. We are designing a DL-based pipeline to determinate which kind of vessel appears in underwater recordings. Thing is that I'...
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1 vote
1 answer
78 views
Is it possible to recognize a sound signal with no speech and just ambient background sound?
I have a speech dataset, but it turned out to be poorly arranged. It consists of 1m files, and most of them are almost complete silence, no speech, no actual sound even. However, these samples have ...
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1 vote
0 answers
87 views
how to read a Rate Random Walk (RRW) on the Allan Variance Plot
I'm trying to measure the ARW (angular random walk) and RRW of a gyro using the Allan Variance Plot. Reading the ARW raises no issue: I get the right value at Tau=1s. When it comes to read RRW, all ...
1 vote
0 answers
57 views
moving median in removing artifacts in EEG signals
how are you there? I am working on emotion recognition using an EEG signal from only one channel placed near the eye, the "nuorosky sensor." So, I will face a lot of artifacts caused by the ...
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