Questions tagged [peak-detection]
129 questions
9
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1 answer
Real time slope and peak detection and calculation
I have a signal that I sample at 500khz. I am trying to detect a rise, fall and the peak in the incoming data. The base of the peak could be for 250 usec or 2.5msec, amplitude could be 6db or 15db above the noise floor. I don't have good snr…
Ktuncer
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9
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1 answer
Derivative calculation
I have a series of data (single array). If I take this data and plot it, I can see that there are multiple peaks. However If I zoom in to a section of data, I see that there is substantial noise.
I like to detect how many peaks in the data using…
Ktuncer
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5
votes
2 answers
Remove negative slopes from signal
I'm very new to signal processing, and have been struggling this far. I've a rather messy signal measuring respiration using some chest bands and would like to focus solely on the inspiratory half of the data - ie. set the beginning of each…
person157
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2
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1 answer
What does this block operator mean?
What does this block do? It's part of a block diagram for a RMS/Peak detector.
hdanielv12
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2
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0 answers
Absolute value vs. power (to make a signal positive-only)
In order to make a signal positive-only, I have the choice between taking the absolute value and multiplying the signal by itself (i.e. taking the signal to the power of two).
Obviously, multiplying the signal by itself requires more circuitry (a…
geschema
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2
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1 answer
How to detect peaks in a microcontroller?
In the context of a microcontroller, I have much less memory and far less processing power. This means, I can only buffer a reasonable window of samples (e.g. 16 or 32), and may not be able to use more advanced curve-fitting options, such as this…
tarabyte
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1
vote
1 answer
Why is peak detection in chromatography not completely automatic?
When I started to write a software for chromatogram processing I naively thought I'd find some existing algorithms that do all the peak detection automatically and there won't be a need for any manual curation whatsoever. But it appeared that none…
Stanislav Bashkyrtsev
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1
vote
1 answer
Peak detection from saturated signals
Say we have a sampled signal for which the inputs can be out of range. For instance, say a sampled sensor has a range of 0 to 1, and is presented with a time-varying stimulus where a peak occurs with max amplitude 1.2. In the data we would see a…
swohler
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1
vote
3 answers
Real-Time peak detection (amplitude)
I capture signal (sound) in 44100hz and I need get response if there is peaks at amplitude, actually. Is this possible? How I can do this in real-time?
rbrisuda
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1
vote
3 answers
Delay Search of two signals
I need to find the timedelay between two signals. I guess MSE is the best approach. How to find that MSE? I am writing the code and I have access to the autocorrelation matrix of one signal and the crosscorrelation of both signals plus the power…
user1876942
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0
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0 answers
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 following notation:
I understand this to mean…
Jabavu Adams
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0
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1 answer
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 correlation function with the sequence that I am…
0
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3 answers
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, however, lower amplitude noise is very common (both…
user33236
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