Questions tagged [digitize]
The digitize tag has no usage guidance.
12 questions
0
votes
1
answer
50
views
Sampling rate margin
There is a lot of literature on sampling rates. Typically, as a rule of thumb around 20% sampling rate margin to bandwidth (e.g. 1.2 x 2 x B) can be used for setting the optimum Nyquist-compliant ...
- 39
0
votes
3
answers
583
views
Can a digital signal has 3 three values(1,0 and -1)?
Typically digital signals are seen having only two values,but is it possible that a digital signal has three values(1,0 and -1)?as shown highlighted in attached snapshot,which has been extracted from ...
- 1,952
0
votes
0
answers
44
views
ADC sampling of incoming signal and aliasing effect [duplicate]
I know from the sampling theorem, that the signal frequency $f_{sig}$ shouldn't exceed 0.5 of sampling frequency $f_{samp}$.
I decided to have a look at it and tried for example $f_{samp} = 50 $ $kHz$ ...
- 367
2
votes
1
answer
61
views
Quantization and Sampling - putting it all together
So after I learned this two topic: quantization and sampling, I'm learning the way to look at both of them and try to optimize the split of a given amount of bit B to N and k, where N is the amount of ...
- 177
0
votes
1
answer
76
views
About Data spreading in CDMA
If we have data we need to transmit which is $i$, so we should multiply is using XOR function with spreading code $y$.
How many bits (Maximum and Minimum) should $i$ and $y$ can have ?
- 639
4
votes
3
answers
489
views
Lower digitisation rate for long distance communcation
Why is it that usually lower digitisation rates are used for long distance communications? e.g. sound is highly distorted in undersea communications, is this because of the lower digitisation rate ...
- 316
1
vote
1
answer
616
views
Oversampling while maintaining noise PSD
I'm designing a digital PID for control and stabilization of laser amplitude. The noise PSD of the laser intensity is around -140dB/Hz, and I want to servo that between DC and 100kHz. I think I've ...
- 113
9
votes
5
answers
2k
views
Improving Digitization by Adding White Noise Before Oversampling
I was reading a physics book and it said that when digitizing a signal white noise was added to improve the process. I don't understand how this works. Therefore my question is:
When digitizing an ...
0
votes
1
answer
46
views
Lpcm encoded data kept on an analog source
Let us say i have some digital data placed in a wav file by lpcm method. At a sampling rate of 44.1khz i can place 5.5kb of data per second of audio by choosing two amplitudes (quantas) for each ...
4
votes
2
answers
982
views
Spectral images - How do they appear during ADC?
Why is it that spectral images appear? I know they appear for $F_s$, but why those replicas appear, I don't know.
E.g., sampling $x(t) = sin(1000 * 2\pi t)$ with a sample frequency of 230 Hz.
I know ...
- 267
0
votes
1
answer
104
views
How best to digitize a noisy phone recording for filtering?
How do I digitize an analog telephone recording and filter it with a Chebyshev filter?
user258
8
votes
4
answers
661
views
How to: pixel packs in an image to representative point coordinates (x,y)
Let's have an image (gray-scale or even binary) as shown on the following figure at the left hand side, the goal is to generate a list of points i.e., coordinates in the form of (x,y) for each pack of ...
- 1,129