All Questions
Tagged with signal-processing computational-physics
9
questions
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votes
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66
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How do you extrapolate frequency data from FDTD simulation time data?
Context: Im a PhD student who plans on doing research in theoretical plasmonics/nanophotonics, so I am studying up on understanding FDTD. I am having a bit of a conceptual issue regarding ...
- 1
1
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1
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51
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Determining the location of light receivers using signals propagating in anisotropic media
Problem.
I have a set of $16$ light receivers with entirely unknown locations, and a pair of light transmitters with exactly known locations. One light transmitter is stationary, and located near to ...
0
votes
1
answer
99
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Sensor Array Position Calibration in Anisotropic Media
Problem.
I have a sensor array consisting of $n \gg 4$ receivers at unknown locations $\langle x_n, y_n, z_n\rangle$ embedded in an anisotropic medium whose index of refraction varies as a known ...
- 799
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37
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Difference Between a Time-Domain and a Simulation Domain Acoustic Pressure Simulation
I would appreciate it if someone would be able to clarify my doubts. I'm currently working on acoustic simulations in COMSOL and is currently confused on the information provided by the simulations ...
- 11
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66
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In square wave modulation: should the low frequency part of the graph not take place in the low amplitude part of the pulse?
I try to get my sound program right, and hoped to find some help here with the understanding of frequency modulation by a square wave.
My modulation looks like this: (please excuse if my formula ...
- 101
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1k
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Fraunhofer diffraction problem in Python: How to interpret discrete Fourier transform (DFT) spectrum?
I have a periodic phase grating consisting of lenslets along the x-direction, invariant in y. I want to use python to calculate the far-field (Fraunhofer) diffraction pattern that one gets when ...
- 19
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431
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How to convert a wave from Amplitude time to Amplitude Frequency domain? Regarding Gravitational waves strain data
I have read that on applying FFT on gravitational wave strain we can bring Amplitude time domain to Amplitude-frequency domain. But when I apply this conversion on the data I had I get this curve
I'...
- 263
1
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1
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737
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Is there any way to find difference between two same sounds of different people? [closed]
I am trying to understand and find a way to distinguish two same sounds of different people by some physics formula, so could you guys help me?
OK I'll try to explain my question in this way that, ...
- 121
1
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119
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Application of wavelets in computational electromagnetics
I am a first-year graduate student (electrical eng.); wavelets is one of the courses that I am taking presently. As part of the course, I plan to explore application of wavelets in computational ...