Questions tagged [white-noise]
White noise has constant power spectral density for all frequencies. Because there is no bandlimit to white noise, it has infinite overall power.
12 questions with no upvoted or accepted answers
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Implementing a non-causal Wiener filter
I'm attempting to implement a non-causal Wiener filter for removing additive white noise from a measured signal. I've had some trouble and I have reduced my problem to a demonstration on simulated ...
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White noise does not contradicts Wide Sense Stationarity?
I am studying White Noise. But I am really beginner level, so I have a confusion with its construction.
White Noise is usually defined as a Wide Sense Stationary process $N=\{N_t\}_{t\in T}$ (for $T$ ...
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Minimum Number of Base Accelerations Needed to Simulate Gaussian White Noise in Structural Dynamics?
I am currently working on a scientific paper where I subject a structure to base accelerations modeled as Gaussian white noise. I am relatively new to signal processing and would appreciate some ...
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What duration of a white noise burst is required for it to be "white" at a given frequency or frequency range?
I am running white noise bursts (with very short ramps on/off to prevent discontinuities) through underdamped resonant bandpasses which are tuned to any given $f_0$ and an underdamped $Q$.
Continuous ...
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Noise color in multidimensional frequency space - is there an angular effect or dependence?
I understand that if there is a non-constant level of noise in one-dimensional frequency space, e.g. noise variance increasing linearly with frequency gives "blue noise" in the iFFT space. ...
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Mean squared error between white noise and colored noise
While studying the whitening filter, I still can't come up with an intuitive and reasonable explanation of why a whitening filter is needed.
As this question and its answer mentioned, I understand ...
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Identification of the spectrum color of a coded video signal
I have two encoded video signals (MPEG and H.263). In each file, I have information about the frames of the video.
I calculated the autocorrelation and then did the Fourier transform to find and plot ...
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Generating a whitening filter using MATLAB cceps() function
I have a few thousand realisations of a discrete stochastic process. I am trying to generate a whitening filter from these realisations. I am expected to use the MATLAB cceps() function to generate ...
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How to produce a noise spectrum from an rms velocity specification?
For a dynamic model I am looking at the appropriate input to analyse the performance under the influence of floor vibrations.
The norm is an ISO VC-C floor spectrum as displayed in the image. However, ...
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How to calculate capacity using Shannon and path-loss?
I am working on tasks offloading on edge computing. I need to find the transmission delay, through calculating Shannon capacity-theoretical maximum data rate- when sending results from the server back ...
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How to apply chi square formula if the expected value is 0?
My $H_0$ hypothesis is that the N signals I've collected are just white random noise, i.e.:
$H_0: d(t) = n(t)$
I'm then asked to formulate the $\chi^2$ test for this. But according to the formula
$\...
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Least square error channel estimation in the presence of AWGN noise
I want to implement Least Square (LS) channel estimation method in the presense of AWGN noise in MATLAB.
$y(n) = x(n) * h(n)$
$Y(k) = X(k)H(K)$
Y(k) is the received signal in frequency ...
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