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# Questions tagged [signal-processing]

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31 views

### Numerically computing time delay between two functions

Wikipedia claims that the argmax of the cross correlation can be thought of as the time-delay between two functions. Using scipy.signal.correlate and randomly ...
• 2,155
60 views

### Help with inferring Network topology from Spectral templates

I am trying to use matlab and YALMIP to solve a graph learning problem of recovering eigenvalues from the eigenvectors of the covariance of sampled graph signal data. This is to implement the ...
1 vote
42 views

### Spectral Intensity of complex signal

I'm simulating an electromagnetic wave that has a real and imaginary part. Something like: $$E(x,t) = A(x,t) e^{-i(\omega t - k x)}$$ Where $A(x,t)$ is some complex amplitude. Then taking the ...
• 11
1 vote
256 views

### Fourier Transform with logarithmic spacing?

I have a very long time series $f(t)$ (hours) dataset taken at a very high sample rate (250 MHz) and would like to understand its frequency structure at many different frequency scales (from milli-Hz ...
• 171
55 views

### Calculate the time taken to run an algorithm on GPU

I want to calculate the total time taken for a fixed code run using an NVIDIA GPU (for instance, Tesla K40). The code has to run 1 million single-bit comparisons. All the comparisons are independent ...
1 vote
165 views

### Deconvolution of sinc function in spectrum calculation in FTS

In Fourier transform spectroscopy (FTS) I am calculating a broadband interferogram (e.m. frequency 190-300 GHz top-hat), then back-retrieving the spectrum by FT. Here in the figure, you can see the ...
• 61
1 vote
43 views

### Digital beamforming: how payload manipulation can change beam direction without manipulating the carrier?

I'm interested in how digital beamforming works and I can not find an answer for a lot of time. I googled, asked teammates, and couldn't get it. Let me describe my question. From my understanding, the ...
1 vote
138 views

• 932
461 views

### Calculate large and small frequency separation for the Sun

I want to determine the big and small frequency seperation from timeseries data for the sun. An excerpt of the data (timeseries and power series) is plotted below. The power series is calculated in ...
133 views

### Use Butterworth and Chebychev filters

I need to calculate frequency response, phase response and apply to signals the Butterworth, Chebychev1 and Chebychev2 band-pass filters. I'm developing in C++ with Qt, and I'm looking for algorithms ...
• 151