Questions tagged [peak-detection]
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140 questions
0 votes
0 answers
24 views
EMG Signal Calibration
I am trying to calibrate signals from EMG sensor at different locations. The objective is to be able to develop an algorithm that can calibrate for the difference in variation between your baseline ...
1 vote
2 answers
162 views
Robust Extraction of Local Peaks in Noisy Signal with a Trend
I'm looking to a way to detect peaks in Matlab for noisy random signals generated by IMU's accelerometers. The signal could be approximate to a sinusoidal-like signal with zero mean and random noise ...
- 111
1 vote
0 answers
81 views
Resonance analysis of a driven harmonic oscillator: phase and amplitude extraction not working as expected
Some introductory remarks I'm playing with a real-world harmonic oscillator (a torsion pendulum) of the form $$ M\ddot x(t) + M\Gamma\dot x(t) + \frac{K}{M}x(t) = F_{\mathrm d}\cos(\omega_{\mathrm d}t)...
0 votes
1 answer
91 views
Anomaly detection techniques using power spectrum peaks?
I'm currently learning about anomaly detection techniques. A lot of the MathWorks literature on predictive maintenance discuss the need to perform preprocessing and feature extraction on data before ...
- 961
1 vote
1 answer
111 views
How to detect the location of a hump in a signal?
I have a signal which looks like this: There is a hump in the signal, with some noise, and I need to identify the location of the hump. The hump is created electromagnetically, so it can be weaker ...
- 111
1 vote
0 answers
101 views
Classifying acoustic drone signal, which notably has multiple consistent dominant frequencies over time
I'm trying to build a basic drone live audio classifier, without much signal processing knowledge. Notably, The drone audio spectrum has multiple notable peaks which are continuous over time. The ...
- 11
1 vote
0 answers
236 views
(scipy) setting prominence in signal.find_peaks
BACKGROUND I am processing a radio signals on a Rpi5 with a Software Defined Radio (SDR) in python and need to adaptively set the prominence parameter of scipy signal.find_peaks. METHOD The SDR is ...
- 143
3 votes
3 answers
256 views
Signal Reconstruction with Local Peaks Preservation
I want to reconstruct a signal with the peaks preserved, while the background trend of the signal removed. At the same time, the small peaks of the signal are emphasized such that the they can be seen ...
- 429
0 votes
0 answers
54 views
Frequency-wavenumber spectrum using FFT-Burg
I am trying to use hybrid frequency-wavenumber spectrum estimation methods to estimate frequency-wavenumber spectrum of acoustic data acquired using distributed sensors. The technqiue that I am using ...
2 votes
0 answers
82 views
Is it possible to approximate a continuous signal using unevenly spaced samples?
I am not well-versed in this topic, so wanted to ask in case there is a well-established answer or method. The problem can be summarized as follows: Given a set of points obtained at a variable ...
- 121
1 vote
1 answer
101 views
Slope Detection in Frequency-wavenumber Spectrum
I am doing analysis on acoustic data to estimate speed of sound propagation in a flowing fluid through a pipe. The slopes of the bright straight lines in the frequency-wavenumber spectrum of the ...
user67390
0 votes
1 answer
113 views
How to demodulate a bit sequence that is offset-modulated with a complex exponential?
I have a discrete-time complex exponential $a[n]*(\cos(\omega*n/N) + j \sin(\omega*n/N)) + b[n]$ where $a$ is constant and $b$: $\{0,1\}$ So it is basically an offset-modulated sequence of bits and I ...
- 157
0 votes
0 answers
56 views
Peaks detection in delta lookback interval for real time algorithm
So I am developing a signal processing algorithm to classify in real time depending on how many peaks I have in my time series, in a delta. I implemented a circular buffer and accumulator to keep in ...
- 153
3 votes
1 answer
201 views
Uniform density 2d peak detection of spectrogram
I am trying to recreate the algorithm used by Shazam to recognize music, as outlined in the paper An Industrial-Strength Audio Search Algorithm. The algorithm performs a specialized peak detection to ...
- 131
1 vote
3 answers
2k views
True Peak detection II
As a followup to my True Peak detection question, I'm trying to implement a detection method by following this documentation using the Catmull-Rom interpolation method. What I've done so far can be ...
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