# Questions tagged [peak-detection]

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### 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 ...
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348 views

### Calculating average peak-to-peak amplitude in a fft plot

I have the following code to calculate and plot fft. The data consists of voltage, current etc. sampled at 30 samples/sec. ...
39 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
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### 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
1k 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 ...
• 917
362 views

### Jerk detection in accelerometer data

I want to detect jerk from accelerator data i.e. values beyond 1.57 m/s^2, but due to the high frequency nature of the sensor (400 values per second), it gives multiple jerks instead of one. How can I ...
• 11
509 views

### True Peak detection

To measure True Peak, MathWorks's Matlab Help Center page suggests: The signal is over-sampled to at least 192 kHz. The over-sampled signal, a, passes through a ...
• 917
312 views

### How to estimate the average distance between peaks (maxima) of the magnitude of an OFDM signal?

Given an arbitrary configuration of carriers having bandwidths that belong to the 3GPP standard (5, 10, 15, 20, 25, 30, 35, 40, 50, ..., 100 MHz), is there a method/rule-of-thumb to estimate the ...
1 vote
54 views

### Envelope of a series of pulsed signals [duplicate]

I need to record a series of pulse waves for an experiment. The recording is done via Software Defined Radio (GNU Radio). The pulse waves are modulated in such a way that the amplitudes of each single ...
• 11
296 views

### Removing very big peaks in a signal

I am analyzing a signal where I want to extract the peaks based on a threshold. My problem here is that there are some noise artifacts very high that are messing with my signal. I want to remove them ...
• 153
2k views

### How to automatically identify the start and stop times of a "ramp" seen in time series?

I am analyzing pressure data sampled at 1Hz. The times series exhibit "ramps" (a linear increase in pressure followed by a sudden drop) for which I would like to automatically detect the ...
• 129
82 views

### localization with TDOA under Doppler shift

In a localization system, I use the TDOA (Time Difference of arrival) method. The transmitter is moving at a speed v and its communication signal is received on 3 receivers at different times. For a ...
1k views

### Easy way of calculating peak to peak voltage of an AC voltage wave

I want to measure the peak to peak voltage of an AC voltage signal. The voltage itself is around 220V and 60Hz. When measured through a sensor connected to an Arduino, it is scaled down to, let's say ...
1 vote
64 views

### Beep Signal for Latency Calculation

I want to play audios on two mobiles with sync. But mobile phones are not in sync. I am trying to find two Mobile phones playing latency so I can pad latency on each phone so they can play together. ...
74 views

### Peak Sharping of multi-signal data

I have multi-signal data and as a processing step want to apply peak sharping of signal as shown in fig below. is there any way I can achieve this in python ? Literature :Paper 1(Peak sharping section ...
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359 views

### Why is peak of the signal taken as the Time Delay

I was reading this research paper titled 'The generalized Correlation Method for Estimation of Time Delay' by C. Knapp and G.C. Carter. They develop an ML estimator and in the introduction mention ...
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173 views

### Peak detection in noisy waveforms

I have a set of 1-dimensional time-series, a subset of which contain either one or two peaks, and the remainder of which are pure noise. I've smoothed these data by ...
• 123
461 views

### Extracting audio segments based on detected onsets using libROSA

I have a couple of .wav sound files with very similar percussive signals of ~60ms duration. I can identify their onset times using libROSA's onset detection quite well. I would now like to extract the ...
• 79
181 views

### How to determine if certain notes exist within polyphonic music?

Given a segment of audio, if you were to calculate the histogram of frequency amplitudes for all standard musical note frequencies present in the audio, how would you check to see if 2-3 specific ...
• 618
264 views

### How to check if a signal is mainly composed of a few impulse peaks?

I am working on a problem that produces different types signals, and I need to detect the peaks after low-pass filtering, then find_peaks from ...
• 31
145 views

### (Radiation) Pulse detection and height characterization when pulses are stacked

Edit: Title Edit2: Clearer picture of low count rates. Edit3: Added 2nd sentence for context. Edit4: Added deconvolution attempt I've been looking at some scope traces I took of radiation. This is a ...
137 views

### Beat detection and calculation of start time

Beat detection I'm trying to create a beat detection function of a machine producing in the language R. I hosted the audio file on dropbox. It was recorded with 16 bit and 16kHz. I started with some ...
• 1
226 views

### Spectral peak location estimation using complex DFT

In this paper a simple method to estimate a spectral peak is proposed, by using quadratic interpolation between three samples of the DFT of the signal. Namely, the position of the peak relative to the ...
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