# Questions tagged [digital]

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3k views

### Explanation of binning in frequency analysis post-FFT

I am creating an Android app which records sound for t seconds at a sampling rate of 44.1kHz with a buffer size of 8192 (16 bit mono samples). I need to plot a ...
2k views

### Digital filters with more zeros than poles

I am having trouble wrapping my head around digital filters with different orders of numerator and denominator. Let me know if any of these points is wrong: All (digital or analog) transfer ...
318 views

### Digital Vs. Analog Phase measurement [closed]

I'm working on a Ultrasonic Transducers resonance tracking system. Where phase shift between Voltage and Current is the feedback signal for my system when phase difference is Zero that means system is ...
8k views

### Nyquist Frequency Phase Shift

The figure below shows in dashed lines sinusoidal signals of the same frequency at three different phase shifts. The signals are then sampled such that the sinusoidal frequency is exactly a half of ...
4k views

### Carrier frequency offset (CFO) estimation using cyclic prefix

I understand the cyclic prefix, but in (1) it's said that: "If we consider that the channel effect is minimal and can be neglected. then the phase difference of the CP and the OFDM symbol which the ...
252 views

### Inverse of the Gibbs Phenomenon to generate a sine wave

I am a quite new to the area of digital signal processing. I am currently doing a project on sine wave generation. I know that according to Gibbs phenomenon, many sine waves add up to form a square ...
847 views

### Confusion with ADC conversion in MCP3424

I am learning about ADC MCP3422 Chip, because I want to use ADC Pi chip with my Raspberry Pi which is using MCP3424 ADCs, but I am having trouble understanding how the ADC calculation is done in the ...
2k views

### Digital filters and the Z-transform

Why is it that we Z-transform a difference equation to get a the transfer function of an digital filter? How come a digital filter is given in the Z-domain, and what is the Z-domain? And for that ...
771 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 ...
213 views

### Low analog lowpass + ADC vs High analog lowpass + ADC + low digital lowpass

I'm doing EEG data collection and my amp forces use of an analog lowpass filter before the ADC. I'm fairly sure that I won't be interested in phenomena associated with frequencies of 30Hz or higher, ...
19k views

### What is IQ Data?

I have no background in telecommunication. Could anyone please explain to me what is the IQ data in telecommunication? It will be best to explain it with some basic analogies. Many thanks!!
371 views

### Digital Panning Effect

To get a panning effect I know that there is a need for a Circular Matrix. The angle is can be set as a default or I can let the user to select the angle. So if the angle is $\theta$, the circular ...
12k views

300 views

### Ignoring Nyquist

What happens if I ignore Nyquist? I have a 16.368MHz digital signal coming out of a GPS front-end chip. My microcontroller (which is reading that digital stream of data) operates at a maximum of ...
70 views

### Find another cosine y(t), whose frequency is as close as possible to that of x(t),

I am going to be straight forward and say this is one of the problem sheets and I am stuck on one of the questions. I already know the answer as I have been given them but I am trying to work ...
136 views

### How to filter a regular ticking out of a digital (on/off) signal?

I have a digital on/off signal sampled at a regular interval. There was a problem with the sensor that produced the signal which has sometimes caused a regular on/off ticking when the sensor should ...
1k views

### Guitar Tuner or Guitar effects Algorithms? [closed]

I need to explore the algorithm of the digital guitar tuner or the digital guitar effects algorithms. Is there any Book or articles that you recommend of? All I know is that relate to DSP. thanks