Questions tagged [quantization]
13 questions
5
votes
3 answers
Which noise sources dominate in a receiver?
For a radio receiver that digitizes over-the-air RF signals (such as an SDR), my assumption (as a DSP guy; pardon my hardware ignorance!) has been that thermal noise dominates total receiver noise, and quantization noise is a slightly distant…
Gillespie
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3
votes
3 answers
Understanding dynamic range in ADC
I am trying to understand dynamic range for ADCs and I am a bit confused. I have seen two definitions (the second of which I don't fully undertand).
The logarithmic ratio in decibels of the maximum to minimum output voltage based on bit depth. For…
4Matt
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1
vote
1 answer
Why is quantization defined in powers of integer multiples of two in digital image processing?
I have been studying quantization in the context of digital image processing. I referred to the 4th edition of the book titled Digital Image Processing by Rafael C. Gonzalez and Richard E. Woods.
In the book, the intensity quantization levels are…
Anubhav
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1
vote
1 answer
How can you measure voltage differences less than thermal voltage (~26mV at room temp)?
If thermal voltage is the average voltage of any given electron relative to the voltage at ground state, and this presumably fluctuates, how can you make any measurement on a circuit more accurate than 26mV?
Taako
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1
vote
1 answer
A/D conversion improvement through Arduino
I have a certain analog signal v(t) which varies from 0 to 2V, which I want to be read by Arduino.
I know that Arduino can read it through the function AnalogRead, and the result will be a sequence of numbers from 0 to 1023. Now, I have some…
Kinka-Byo
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0
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0 answers
How to avoid distortion (quantization error) in DDS output in STM32?
I have been using a timer interrupt to generate sine waves with an STM32, however, for higher phase increments (to get higher frequencies as output), there are quantization errors (distortions).
To solve this problem, I thought of using half period…
Rima
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0
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1 answer
Formula for step size in Quantization
I've just started learning about Quantization and I'm a little confused.
Currently my understanding of it is that we should use the formula (Vmax-Vmin)/2^n where n is the amount of bits used.
However, using the example of Vmax=5, Vmin=0 and n=3, we…
tthh
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0
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0 answers
Minimize the quantization error of transducer and DAQ
Can somebody please let me know how to solve this problem:
A 12-bit A/D converter has an input range of ± 10 V and is connected to an input amplifier with a programmable gain of 1, 10, 100, or 500. The connected transducer has a maximum output of…
LearnerABC
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0
votes
1 answer
What are the different types of digital signals
In a digital logic class I was taught that a digital signal is one whose y-component, voltage, is discretized but whose time domain is continuous. In a signal processing class, we worked with digital signals that may have 8 bits of discrete voltage…
Thomas Coor
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0 answers
How exactly could you prove the following question about quantum computing?
Consider a function f mapping a bit onto another bit, i.e. f:{0,1}---> {0,1}. The function f is either constant, so f(0)= f(1) or balanced, so f(0)different f(1). Thq qunatum gate for the Deutsch algorithm id given in Figure 1. The second gate f…
Abdel Ruvalcaba
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0
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1 answer
Quantization results in harmonics in ADC FFT plot
This is taken from Analog-to-Digital Conversion by Marcel Pelgrom.
Okay, I understand that with 1-bit quantization, the output is block-wave (Square) and that of course when you do the Fourier Series, has harmonics. That makes sense.
What I don't…
AlfroJang80
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0
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Arduino lack of accuracy in AD conversion
let's consider this simple piece of code:
void setup() {
Serial.begin (9600);
}
void loop() {
int code = analogRead (A2);
double voltage = code *5/1024;
Serial.print("Voltage is ");
Serial.println(voltage);
…
Kinka-Byo
- 3,340
- 2
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0
votes
2 answers
How does the quantization error decrease when the input signal is matched to the ADC input?
Assuming a theoretical example imagine that we at first feed a 1V pk-pk noiseless sine to a 10V ADC. And in the second case we feed a 10V pk-pk noiseless sine to that 10V ADC. As far as I understand from other questions, the quantization noise…
user1245
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