Fast Fourier Transform Calculator

• To do an FFT
  
  
  1. Enter the time domain data in the Time Domain Data box below with each sample on a new line. For complex (I and Q) data, the real and imaginary components should be on the same line saparated by a comma.
     
     
  2. Select the Window from the drop down menu (if you are not sure which window to use the default is good choice for most things).
     
     
  3. Press the FFT button.
  
  
• To do an Inverse FFT
  
  
  1. Enter the frequency domain data in the Frequency Domain Data box below with each sample on a new line. For complex (I and Q) data, the real and imaginary components should be on the same line saparated by a comma or tab.
     
     
  2. Press the Inverse FFT button (note that no window function is used for the inverse FFT).
  
  
• The time or frequency domain graphs can now be viewed by clicking the Time Domain Graph or Power Spectrum buttons.
  
  
• To generate sample time domain data click the Sample Data button.

FFT Applet version 1.2.2. Click here to see change history and previous versions