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FFT Laboratory  
This applet shows the real and imaginary parts of f(x) and F(k). You also can view the source code of this applet.
Submitted: Nov 22, 1999
FFT Spectrum Analyser Demo (Java 1.1 Version)  
The applet demonstrates the use of the Fast Fourier Transform (FFT) to determine the frequency spectrum of a discrete signal (time series).
Submitted: Nov 22, 1999
FFT Spectrum Analyser (arbitrary waveform function)  
This demonstration is similar to the FFT spectrum analyser demo applet. The difference is that instead of choosing the input signal to the spectrum analyser from a limited selection of waveform types, you can define your own arbitrary waveform by typing in the mathematical expression which describes the input waveform. The waveform generator is implemented in JavaScript and the sampled values of your waveform are passed to the Java applet, which plots the signal, performs the FFT calculations, and plots the frequency spectrum. Note, however, that while JavaScript offers more flexibility, it doesn't run as fast as Java.
Submitted: Nov 22, 1999
FFT Spectrum Analyser Demo (Java 1.02 Version)  
The applet demonstrates the use of the Fast Fourier Transform (FFT) to determine the frequency spectrum of a discrete signal (time series).
Submitted: Nov 22, 1999



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