Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [fft]

FFT is an acronym for Fast Fourier Transform. Use this tag for FFT-related questions. Try to also select a specific chip or software tag when possible.

Some articles about the fft for learning more:

http://en.wikipedia.org/wiki/Fft

http://en.wikipedia.org/wiki/Discrete_Fourier_transform

http://www.dspguide.com/ch12.htm

http://www.complextoreal.com/chapters/fft1.pdf

http://www.complextoreal.com/chapters/fft2.pdf

http://www.complextoreal.com/fft3.htm

221 questions
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What is the efficient way to perform FFT for large set of Samples?

I'm trying to perform FFT for large set of samples, Sampling Rate : 1 MHZ No. of Samples Captured : 1 Million (1 sec duration) currently what I'm doing is, I've added zero padding so that it matches to 2^n, and now the total number of samples are…
SanVEE
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FMCW - FFT - Range resolution

with a prototype of FMCW radar I'm trying to resolve the distance to the target The Audio card characteristics are as follows: Fs= 44100Hz So the FMCW radar range resolution is RR=440MHz/c = 0.34m Ts=20ms thus, number of points N=Fs*Ts = 882 I've…
White Sparrow
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FFT of R2R DAC in LTSpice

I designed a 6-bit current-mode R2R DAC in LTSpice. This is the output spectrum with a 500kHz input sinusoid to an ideal ADC (running at 10MHz clock) which feeds directly into the DAC. Vin is input to ADC, Vout is output of DAC The output FFT…
AlfroJang80
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Sound spectrum analysis, adverse harmonic tones, micropython, adafruit, fft

Explanation In this Micropython project I wanted to build a cheap/small sound spectrum analyser to identify specific tones during testing. Initially I tried to connect the Adafruit sound sensor with an ADC and RPI but then faced a lot of timing…
Lean
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Can the transient response of a system be calculated using FFT and inverse FFT?

I have a system, its input and output has the following relationship. I want to know the transient response of the system with respect to a ramping input Xi=t, by solving the differential equation, the response I obtained is Xo= t-sin(t); Now I…
Jake
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Understanding "FFT" Can anyone understand what I have in the picture?

I have a 15volt dc signal with an FFT on channel 1. I see a pulse on the FFT. Does this mean I have a voltage at a certain freg?
BKnight
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