What is the relation between FFT length and frequency resolution?
This is my experience with MATLAB FFT calculations: if you sample a sine wave at 8000 Hz for a duration of 20 seconds you will collect 8000x20= 160,000 samples when you perform FFT …
decibel - Meaning of dB units in periodogram (FFT) - Electrical ...
2021年5月3日 · An intuitive question on the meaning of bins in a power spectrum of FFT. 0.
signal processing - What do we mean by " FFT points "? - Electrical ...
2017年5月4日 · When taking the FFT of a signal, we need to decide on the amount of points. The more points we have, the higher our frequency resolution is. This is our "fft poitns" - the …
An intuitive question on the meaning of bins in a power spectrum …
2015年10月21日 · \$\begingroup\$ @user44635, if you do an FFT... of equal length... I only keep harping on this, because in the original question, the questioner seemed to be specifying a …
How to plot the FFT in Ltspice? - Electrical Engineering Stack …
2023年10月2日 · Below is the waveform for current flowing through R1.For getting the FFT of the waveform,right click on the waveform,select the option view and then select FFT. Then you …
Help me understand FFT and harmonic distortions
2015年1月9日 · I'm new to FFT and harmonic distortions. I'm dealing with a power system where the phase currents are distorted. Now I don't understand the concept of FFT and why the …
Relationship of FFT Size, Sampling Rate and Buffer Size
2015年1月14日 · Most FFT code I have seen works on 2 n sample sizes, so 600 bins isn't a nice number. That would be 1200 samples - not a 2 n. So you'd probably want to round it up to 2 …
Meaning of phase in Fourier Transform of audio signal
2016年2月12日 · Yes, just use the magnitude of the FFT output (\$\sqrt{re^2 + im^2}\$) - this gives you an estimate of the power spectrum. Phase information is generally of little interest in …
Scaling FFT output by number of points in FFT
2012年1月30日 · An unscaled FFT followed by an unscaled IFFT using exactly the same complex exponential twiddle factors multiplies the input vector by scaler N. In order to get back the …
signal - What is the meaning of the difference between the Fourier ...
You may ask how FFT spectrum would still be errorneous if the phase angles and negative frequencies were added. Answer: It would give the same pulse infinitely repeating. The …