Questions tagged [peak-detection]
The peak-detection tag has no usage guidance.
104
questions
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1answer
24 views
Using Neural Network for locating shifting resonant frequencies
I have multiple FFT's taken from a sample at different pressures, through different analysis I can see that the resonant frequencies are shifting in the spectrum for each FFT at a different pressure.
...
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0answers
40 views
Frequency Estimation Using Multiple Signal Classification Algorithm (MUSIC)
I'm working on side research that deals with signals and data in the time domain. currently, I want to use the multiple signal classification algorithm (MUSIC) which is mainly used for frequency ...
0
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0answers
22 views
Blais Rioux Detector peak detector implementation
I'm trying to implement the Blais Rioux detector to find the center of a peak with sub pixel, resolution.
The image shows the results of the implementation in a ...
0
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1answer
39 views
How to determine a suitable threshold when using amplitude thresholding method for spike detection?
I have seen number of approaches that have been introduced in the literature for spike detection including, amplitude thresholding method, Nonlinear Energy Operator method, and template matching ...
0
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0answers
21 views
Matched filter correct peak detection [duplicate]
I am working with ultrasound signals with frequency 100 kHz. Chirp signals with bandwidth 16 kHz are being modulated with 100 kHz and then transmitted via one ultrasonic sensor. With another ...
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0answers
24 views
Filtering out symmetric noise from an oscilloscope reading
I have a signal that looks like this:
The data is readings from two oscilloscope channels, one color coded blue, the other color coded orange. I would like to filter out the supply noise (all the ...
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20 views
Extracting time-tagged pulses from Geiger audio recording
I am doing some tests with SmartGeiger detector designed for smartphones. The sensor unit sends pulses via phone microphone jack input and the app does the counting and calculates the values.
However,...
0
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1answer
52 views
How to find correlation between two signals regarding peaks?
In a super-resolution task, I try to predict the higher frequencies of a signal.
X low-resolution (lr) is my input and Y high-resolution (hr) is the target. Where X contains only frequencies till 2 ...
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23 views
How to find phase of two fixed Gaussian of periodical signal (analytically)?
For a periodical signal define on $\phi \in [0, \pi * 2)$,
there was supposed to be two peaks,
may following Gaussian, but may also be Cauchy or other distribution with one peak,
plus Poisson noise.
...
0
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1answer
34 views
Detecting peak value on realtime IMU data stream
I'm using Qt C++, QCustomPlot to read and display realtime value from an IMU. This is how I set the realtimeDataSlot:
...
0
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3answers
136 views
How do you do signal averaging on a realtime data?
Smoothing algorithms implemented by me
Exponential smoothing - https://www.openprocessing.org/sketch/771368
Moving Mean - https://www.openprocessing.org/sketch/540696
For example - a1+a2+a3+a4+... ...
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5answers
160 views
How to detect overlapping peaks in FFT?
I am working with a modular spectral processing STFT toolkit I have written in C. I often need to carry spectral peak detection and analisys (frequency estimation, peak displacement, etc) but I am ...
0
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1answer
53 views
How to measure algorithmically side lobes in real data
I want to measure algorithmically the following parameters in a given FFT data (real numbers).
peak side lobe levels
side lobe levels
side lobes nulls
The following image illustrates parameters I ...
0
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2answers
135 views
Envelope reconstruction algorithm for audio processing
I need to reconstruct the envelope of a sound.
Audio data are professionally-recorded natural sounds (speech, bird songs) with very little noise. I would prefer working in the time domain rather ...
0
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0answers
39 views
Detect Trigger in vibrational data
I'm trying to classify states with a 1D-CNN-Network structure. Therefore I need to analyze the incoming vibrational data in a certain window. Two examples of such signals are shown below.
I'm ...
0
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0answers
57 views
peak detection for stock data?
I am looking for some suggestions on what techniques to use for stock data. Specifically i am looking for some methods to both de-noise data, and then find ways to transform the smoother data into a ...
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2answers
1k views
How would you use machine learning for peak detection?
I have a noisy signal and I'm trying to find a way to detect peaks with ML. The "peaks" are easy to find as human because they are rhythmic and have the same "general" shape but the amplitude and ...
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0answers
81 views
Robust peak detection taylored for spectroscopy
i need a algorithm for peak detection in raman spectroscopy. I tried this one, but it did not give me satisfying results.
Spectrums may look like this:
In professional software, i think they use the ...
1
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2answers
99 views
Filtering Surge Signals
I am working on a matlab program which needs me to detect the pattern of surges in a signal and then remove them. I tried out various filters like median, hampel, butterworth etc. but couldn't get an ...
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46 views
What exactly does up triangle \land symbol mean in the context of peak detection?
Folks, I'm reading this paper: User Adaptive QRS Detection Based on One Target Clustering and Correlation Coefficient, and have a question about notation.
In describing peak-detection, they use the ...
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1answer
68 views
0
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1answer
288 views
Time delay estimation between two complex signals(IQ)
I need to time align two complex signals. The two signals obtained were at different RF frequency before digitisation. So,I have two complex signals(IQ) and I need to do delay estimation and apply ...
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0answers
93 views
Extracting signal from data using Otsu thresholding in MATLAB?
I am very new to signal processing. I am trying to extract a signal from my data using otsu threholding but it's not fully accurate. In this case I know that there is going to be a single signal in ...
1
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1answer
321 views
Filtering and peak finding
I have an observed signal which is the norm of the sum of two 3-vectors:
$$
S(t) = || \mathbf{A}(t) + \mathbf{B}(t) ||
$$
Now, I have full knowledge of the vector $\mathbf{A}(t)$,
$$
\mathbf{A}(t) = \...
0
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2answers
438 views
Detection of sharp peaks in an audio signal
I have an audio signal and I'm interested to detect the very sharp peaks.
If I zoom, here is something that should NOT be detected (this is voice actually):
NO GOOD
Here is something that should be ...
0
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0answers
45 views
Peak Analysis vs Machine Learning
I am unsure about which approach is "better" (less time good accuracy) for classifying gestures:
The system is a doppler radar that returns I and Q signals
Approach 1:
Have several subject perform ...
0
votes
2answers
273 views
Threshold for peak detection of noisy signal in frequency domain
I have a noisy signal (Gaussian Noise) with a known SNR and known Noise variance.
This signal contains a number of Frequency components.
My ultimate objective is to detect the components of the signal....
3
votes
4answers
302 views
Estimate peak width from a vector that is a superposition of unknown number of identical Gaussian peaks with different heights?
If you have a vector that is a superposition of an unknown number of identical Gaussian shaped peaks/impulses of unknown width (but all the same width) and different amplitudes (with Poisson or ...
3
votes
1answer
126 views
Chromatogram peak detection - bunching vs others?
Reading presentations from existing tool providers I noticed that in order to detect peaks they first use bunching (average N points) and then use slope and curvature to detect peaks. I'm guessing ...
0
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1answer
45 views
How to differentiate an empty aerosol from a full one using only sound measurements?
The challenge I have is to detect an empty spray container using sound measurements only, since I can't place any sensor directly into the container because of the mechanism that tightens it.
My main ...
0
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1answer
2k views
Checking for VHF pulse with SDR and python
So I have a small NooElec Software Defined Radio and I've got it working well with my Raspberry Pi using GQRX as a controller and to visualize the SDR output.
My goal though is to use a python script ...
0
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1answer
183 views
Peak Detection Of Every Pulse
I have this signal as the following figure:
Now, I need to know each beginning index of each pulse as described in the following figure:
I have tried to detect the peaks through obtaining the cross ...
0
votes
2answers
76 views
What should I do with FFT result array from microphone input? [duplicate]
I currently want to create a small pitch detector and I have to say that I am very new in this topic of signal processing.
At the moment I implemented the FFt algorithm and I got an array of window ...
0
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2answers
174 views
Pitch detection of two following music notes (C0 and C0#)
Hi signal processing community,
currently I am working on a pitch detection tool which should work on audio input files (or later also instrumental or voice from microphone) to say which music note ...
0
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1answer
460 views
How to get coordinates of complex RTL-SDR signal?
As I have already explained here (https://stackoverflow.com/questions/49358449/python-how-to-get-coordinates-of-complex-rtl-sdr-signal-peaks?noredirect=1#comment85722604_49358449), I need to find the ...
0
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2answers
666 views
Curved noise floor and ugly unexplained peaks after FFT
It has been so long since I studied this at University, so I'll better ask here if I'm doing something really wrong here.
I'm using a USRP frontend for L1 band surveillance. I want a 20MHz bandwidth, ...
0
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3answers
332 views
Extract breaths from respiratory signal, i.e. peak detection
I am trying to extract breaths from a respiratory signal, which is essentially peak detection. See the example below for what such a signal looks like. This particular signal looks rather clean, ...
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1answer
573 views
Harmonic Product Spectrum algorithm. I dont understand one step
I was looking some Harmonic Product Spectrum algorithm examples and I came up with this:
...
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1answer
973 views
Name of peak finding algorithm
I've been using this implementation of a peak finding algorithm and it works pretty well. I'm wondering if this particular algorithm has a name?
Python code:
...
2
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1answer
38 views
What does this block operator mean?
What does this block do? It's part of a block diagram for a RMS/Peak detector.
6
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1answer
9k views
Taking audio frequency and picking out peaks (Peak Detection)
So I have a unique challenge. I want to take an audio file, and pick out the peaks in the samples and plot that onto a graph. Each point based on the amplitude/pitch(?) will be represented as either a ...
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1answer
2k views
How do spectrum analyzers detect peaks?
Using peak search, I'm able to put the cursor on any of the several peaks on the spectrum analyzer display. I am trying to do something similar in software, with the output of the FFT of the radio ...
asked Feb 10 '17 at 15:23
HH- Apologize to Carole Baskin
3951 gold badge4 silver badges13 bronze badges
2
votes
1answer
212 views
How to detect peaks ignoring soft declivity?
I have to detect repetitions in a signal, and I am managing to do it by finding peaks and valleys, and cutting the desired pieces. The following figure shows the pattern wanted, shaded areas are the ...
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0answers
218 views
Cross Correlation shows peak at the same location every time
I have a signal which is taken from an accelerometer and I'm trying to match patterns between different windows of the signal by cross correlation. To do this I take different windows of the signal, ...
1
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1answer
238 views
How can I get the uncertainties for peaks on an image?
When pick the peak points on an image, e.g. the matrix made by peak in matlab as this one,
I can use max to get the index of ...
2
votes
1answer
292 views
Unexpected peaks in spectral analysis
I am doing the spectral analysis of some antenna recorded signals by computing PSD (logarithmic absolute value of the FFT) and the spectrogram of the signal. The problem is that I get some unexpected ...
2
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0answers
126 views
Peak detection for signals that contain high frequencies
I have an question about peak detection. My purpose is creating a plot with an impulse response and the decay line at / above it.
What I see till now is that there are two options for finding peaks:
...
1
vote
1answer
142 views
Detecting expected patterns in repeated measurements
I am new to signal processing and I am trying to learn myself. To understand what i am interested in, let me show this on example (note that this is just a random example to illustrate). Here is some ...
0
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1answer
611 views
Periodicity of peaks within a signal
I have a signal, in which i want to detect the period of the peaks, that exist within this signal: for example : After each 5mm or (5 seconds depending on the sampling rate and speed of my motor) i ...
2
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0answers
156 views
how to detect number of syllables in a batch of audio recordings?
I have a corpus of short speech samples from Kiswahili speakers, and I want to detect the number of syllables in each audio recording. How should I approach this task?
Background: I asked a ...
