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Power spectrum and power spectral density in Matlab
I'm currently trying to analyze the spectrum of a prbs signal in order to better desing inputs for my experiments. However, I have some confusion so far. On one side, we can use Matlab's cpsd function ...
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Why does the power spectrum E(k) of my velocity field follow 𝑘 ^(−(n−1)) instead of 𝑘^(−n)?
I am generating a random velocity field. Generally, the energy in Fourier space is defined as E(k) = (vx(k)^2+vy(k)^2)/2. In some cases, the energy follows a power-law spectrum,
E(k)∼k^(−n) in 2D ...
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1
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117
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Sinc-like feature removal with an FFT
Outline
I have some Raman spectroscopy data that contains features that I want to remove. I'll point them out in the figure below:
Here you can see two sets of peaks that I am interested in, with the ...
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How to calculate the total number of different frequencies that are present in audio signal spectrum?
How to calculate the total number of different frequencies that are present in audio signal spectrum? Is that possible? Linux platform.
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Reproducing Transmission Spectrum from Photonic Crystal Paper (Transmittance Peak Issue)
I’m working on a project where I’m trying to reproduce the transmission spectra of a one-dimensional photonic crystal (PhC) with a defect layer, based on a research paper. In the paper, they show the ...
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Unity Get Spectrum Data reduces resolution on Android, vs PC
I have an Android application in Unity, which visualizes the audio that is played in AudioSource. It works very well in the editor and in building for desktop, but after building for Android, it ...
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289
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Calculate Power Spectrum From FFT
I am writing a IQ analyzer app in c++ qt and I am processing the IQ data that comes to me with fft (I am using the fftw3 library for this). Then I am trying to calculate the power spectrum. This is ...
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174
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Is there a way to approximate a set of wavelengths for a given RGB color?
I am trying to write a simple CLI tool in python for finding a set of wavelengths, that when converted to RGB and then combined, are close to the input RGB color.
I cannot find a good method to do ...
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71
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Implementing Continuous Averaging Memory for White Noise Signal in Simulink
I'm currently working on a project where I need to develop a continuous averaging memory to compute the average frequency spectrum of a white noise signal. The goal is to achieve a Degree of Freedom (...
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1
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466
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Mismatch between periodogram calculated by SciPy periodogram and AstroPy Lomb Scargle periodogram at low frequencies
I am trying to compute the periodogram of my data using both SciPy's periodogram and AstroPy Lomb-Scargle periodogram—the periodogram matches everywhere except at frequencies near the minimum ...
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2
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108
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Distort frequency spectrum in python signal
I have a signal with clear frequency peaks, I want to distort the signal that the frequency peaks are not distinct but much broader (see picture).
I'm working with python and don't have any idea how ...
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53
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Export and plot using a Python notebook a 2D contour plot from Topspin
From the Topspin program, I am trying export a selected region in
an adequate format
to afterwards
be plotted using a Python code.
To start with I do not know which format to be exported is the ...
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219
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YIN Pitch Detection Algorithm Crate Struggling to Find Frequency From Guitar Interface
Okay so this is like a part two of my previous question that was closed. For a little background, I am attempting to match an input from a bass, connected to my pc via an interface (Scarlett Solo), to ...
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105
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Identify lines in spectrogram using python
I have a long strip of data with some lines in it that are visually very clear (both blue and red), however, I can't seem to be able to identify them versus the background.
I've tried to average the ...
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Inverse Discrete Time Fourier Transform of spectrometer data in python
So I have been trying to automate the conversion of my pulsed laser spectrum data to pulse duration via a python script. However somehow my transformed data does not seem to fit. Does anybody know ...