Questions tagged [signal-processing]
The subfield of electrical engineering that focusses on analysing, modifying, and synthesizing signals such as sound, images, and scientific measurements.
104
questions with no upvoted or accepted answers
1
vote
1
answer
51
views
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 ...
1
vote
0
answers
41
views
Spectral representation of a white stationary process
I am trying to better understand the spectral representation of stochastic processes. From the book "Spectral Analysis for physical applications" by Walden and Persival:
The spectral ...
- 111
1
vote
0
answers
24
views
Minimum Observable Offset Frequency in Leeson's Formula
It has been argued in some publications that the age of the universe represents a lower limit on observable frequencies (in their paper, corresponding to a value of $10^{-17}$ Hz). The authors do not ...
- 100
1
vote
0
answers
78
views
Confusion with spectral density of the emitted power of blackbody radiation
I'm reading a book discussing electrons' velocity fluctuations, which would cause electronic noise when detecting signals.
Velocity fluctuations originate from thermal motion. Superimposed on the ...
- 11
1
vote
1
answer
53
views
Wavelength and frequency associated with a wave pulse
What are the definitions of wave length and frequency of a wave pulse?
- 468
1
vote
1
answer
65
views
Is this a good use of the convolution?
I would like to replicate the real response of an instrument to some signal. Here's what I have in mind: I generate some ideal signal. I then add Gaussian noise to it to produce a realistic signal s(t)...
- 150
1
vote
1
answer
88
views
Data transmission through optical fiber and copper wire
I read the following in one reference: A copper wire (twisted pair), the link traditionally associated with low bit rate transmission, is still in use in the modern data centers transmitting data at ...
- 111
1
vote
0
answers
37
views
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
1
vote
0
answers
35
views
Can a signal calculate its time period?
I wanted to know if a radio wave has some kind of data for example a kind of packet information (if its a thing) and it gets transmitted and gets received by a receiver, then can it calculate the time ...
- 21
1
vote
0
answers
244
views
Fourier transform of sound wave
I am a high school student doing a project in Fourier transform. I was planning to learn Fourier transform and manually apply the calculations to a section of a song and see what I get. However, I ...
- 11
1
vote
0
answers
43
views
Computing a second harmonic resistance out of a wave-like resistance signal
I want to reproduce the results of a paper, in which they measure the Anharmonic Hall Effect (AHE) resistance $R_{AHE}^{2\omega}$. There are several protocols for measuring it experimentally, but I'm ...
- 181
1
vote
0
answers
41
views
Why square wave-form output is higher than a sin or a triangle wave-form output?
I'm working on a digital audio synthesiser and I'm facing out an issue about the amplitude level.
I'have a sinusoid signal which have a max amplitude of $-1 / +1$ and a square signal which have a max ...
- 111
1
vote
1
answer
141
views
Intuitive explanation of Nyquist rate?
Is there an intuitive way to understand Nyquist rate (i.e., that, in order to prevent loss, an analog signal must be digitized at a rate twice as high as the highest frequency component of the signal)....
- 111
1
vote
0
answers
111
views
Noise power spectral density and $|X(\omega)|^2$. Why are those quantities associated usually ? Their definitions are different
I consider a generic signal $X(t)$. We could imagine to fix ideas $X(t)=\sqrt{R}I(t)$ ($R$ being a resistor and $I$ current flowing through it)
The energy of this signal is defined as $E=\int_{-\infty}...
- 1,450
1
vote
2
answers
67
views
Wireless data transmission more than a bit at a time
I'm not that educated in wireless data transmission, but, the basics of frequency modulation and or amplitude modulation are quite basic. Is there any examples of transferring more than a bit at a ...
- 11