# Questions tagged [signal-analysis]

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### Audio from multiple microphones mixed to mono and ASR

I am trying to do speech recognition on an audio file which has 1 channel (mono). My problem is that the channel is comprised of the signal of 3 microphones which have captured the audio at different ...
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### Which filter makes sense for a triggered event?

I have a very noisy data from a particle accelerator and I want to improve the signal (in every way it's possible): As background: It's data from an electron accelerator which produced Bremsstrahlung ...
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### How to use frame based audio features for machine learning

I have an audio recording (wav file) that is 2 seconds long. That is my sample and it needs to be classified as [class_A] or [class_B]. To extract MFCC features, I divided the sample into frames (183 ...
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### Window size and DFT size

I am using pwelch function of Matlab which returns the power spectral density (PSD) estimate. This got me confused about DFFT size and Windows size. Here my code: ...
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### Best Method to Separate square wave and smooth wave

I have a signal consists of a smooth wave and square waves. Is there comprehensive method can separate square wave and smooth signal? I looked for the likelihood ratio test but cannot find any ...
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### The signal $\frac{e^{j10\pi n}}{10}$ is periodic/aperiodic?

How to verify the function $$\frac{e^{j10\pi n}}{10}$$ is a period/aperiodic function ? My attempt: $\omega_o=10\pi\implies f_o=\omega_o/2\pi=5$, which is a rational number. So the given function ...
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### Determining the probability of two signals, with added independent noise, being the same?

I have the first 100ms of two signals, each with a noise independent to that signal. I want to compare the two signals and determine the probability that these two signals are (minus noise) the same, ...
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### quantitative definition of “FFTable” data point as a function of the signal to noise level

Regarding hotpaw2's answer to the "Number of FFT points required for a specific frequency resolution for an oversampled signal" question: Given that the result of an FFT can be interpolated (...
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### One period with transient

Assume I have only access to only one period of a signal that there is a transient effect on the signal as well. I am pretty sure that there is a particular frequency in the signal. Is there a way ...
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### What are the popular benchmark systems and equations in adaptive signal processing?

In various papers I met repeating equations and systems used during experimental analysis. For example AR model as follows $x(k) = 1.79 x(k-1) - 1.85 x(k-2) + 1.27 x(k-3) - 0.41 x(k-4) + v(k)$ seems ...
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### How does the error in azimuth angle vary as one moves away from the boresight direction of a radar

My question is basically same as the title. I am trying to find a mathematical model which provides the error, $d\theta$, in azimuth angle($\theta$) as one moves away from the boresight direction of ...
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### Correlation between a lowfrequent and a fast signal

I need to evaluate the correlation between some measured signals. Those signals are for example current, temperatures at various points, vehicle speed and torque from an electric motor in a vehicle. I ...
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### Removing gravity from a non-orthogonal body

I am not sure where to post this question, if it is not appropriate here can you suggest where shallI post it to? Question: I have a Cube with dimension of x,y,z. I am trying to do some integration ...
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### Wiener filter with no WSS process

I'm trying to learn something more about Wiener Filters and I can't find anywhere what happens when I feed a Wiener Filter with a non WSS process. Could anyone give me an explanation or any book (...
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### Perturbation test for a real plant

How should we conduct a perturbation test for an LTI unknown system by perturbing the input to see the output response i.e. How many different perturbation step size should be given to the input?
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### Signal processing on the graphs: generalized euclidian distance

In signal processing (SP) often we need to compute sample-wise distance between two signals, e.g. computing MSE. SP on graphs concerns the case when the domain of the signal has some intrinsic ...
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### Detecting special points in signal

What tool/filter/mathematic operation would you use to detect the red points marked in this signal? As you can see there are several differentiated groups and I want to detect those moments in which ...
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### What is the best algorithm to detect leading edge?

I am interested to detect leading edge of one dimensional signal. There may be several algorithm for edge detection, specially for image processing (2 dimensional), but my interest is on one ...
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### Books and references virtual microphone

What are some applications of virtual microphones (as in here http://sail.usc.edu/aigaion2/index.php/attachments/single/119.)? Are there good references (books or comprehensive tutorial papers) for ...
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### Independent component analysis for one observation of a Signal

So I am a complete novice to ICA, so excuse my question if it is bad one, but I have the signal: $$\sin(2\pi x) + \sin(4\pi x) + \textrm{Additive White Gaussian Noise}$$ I want to try to separate ...
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### How to separate two signals which have same frequency and phase but generated from different positions?

How to separate two signals which have same frequency and phase but generated from different positions? For example, the EEG signals, we assume there are only two positions, position A and position B ...
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### How do I correctly receive a signal using a signal analyzer?

For the past few weeks, I have been trying to send a Zaddof Chu signal using a vector signal generator, and receive it using a signal analyzer. Both devices are made by R&S. However, the signal ...