Questions tagged [digitize]
The digitize tag has no usage guidance.
9
questions
0
votes
0answers
40 views
Signal acquisition equipment phase noise
I would like to check if there is a way to enhance an RF equipment's phase noise figure.
The considered RF acquisition homodyne system includes a mixer for carrier demodulation, amplifier and filter ...
0
votes
1answer
40 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 ?
4
votes
3answers
472 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 ...
1
vote
1answer
299 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 ...
8
votes
5answers
1k 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
1answer
42 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
2answers
761 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 ...
0
votes
1answer
96 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?
7
votes
4answers
576 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 ...
