Linked Questions
10 questions linked to/from Higher order harmonics during sampling
4
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Sequence expansion by zeros and interpolation - does it insert additional frequencies?
I am struggling with understanding the consequences of oversampling on the frequency spectrum of the signal.
If I understand correctly, with an oversampling rate of 8X we insert 7 new values for each ...
- 67
4
votes
1
answer
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What is the difference between undersampling and oversampling in analog to digital conversion ?
When converting a signal from analog to digital, we observe undersampling and oversampling.
Does oversampling means that the sampling frequency is greater that the signal's frequency and does ...
- 165
0
votes
1
answer
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Sampling - Higher order harmonics
I have been studying about the sampling theorem and it seems that even though we sample at a frequency with the nyquist criterion, the harmonics (due to sampling process) remain within the nyquist ...
- 343
1
vote
1
answer
1k
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The downsampling step with discrete wavelet transform
For one stage discrete wavelet transform (DWT), if we have a signal with 1000 samples occupying the frequency range from zero to 500 Hz, the output of the low-pass filter is a signal with frequency ...
- 349
1
vote
1
answer
727
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LPF in the stage of IQ demodulator is it a analgor filter or digital filter?
I recently designed the LPF of the IQ demodulator using the Butterworth LPF refering to https://dspillustrations.com/pages/posts/misc/baseband-up-and-downconversion-and-iq-modulation.html. But I have ...
- 109
0
votes
1
answer
953
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Decimation FFT Result
In my Signal Processing class we just learned decimation however after messing around in Matlab trying an example of decimation, I just can't understand what's happening.
I get the introducing twi ...
- 37
0
votes
1
answer
266
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Sampling, filters, windowing, FFT. From theory to help on this coding list
My plan is to analyse the spectrum of samples from a microphone.
I wonder how correct this suggestion is. The below description may then fail on several points. I am in need of somebody with a red ...
- 99
0
votes
1
answer
338
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Decimation effect on the spectrum
If I have a sampled cosine wave signal with Fc = 80kHz and Fs = 200kHz (so the Nyquist region is between 100kHz and -100kHz) and I want to preform a decimation by the factor of 2.
Will my input signal ...
- 25
0
votes
1
answer
132
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Number of discrete samples required for the longest wavelength
I am trying to understand the effect of the critical Nyquist frequency when applying the Goertzel algorithm for estimating the power spectrum of a discrete signal. (Goertzel doesn't really matter, ...
user16354
-1
votes
1
answer
160
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Convert analog to digital and back to analog
I'm trying to convert a signal from analog to digital and back to analog to observe the working of ADC and DAC, I use AD9248 as ADC and AD9767 as DAC, both of them are available on THDA ADA Altera ...
