Do you know how to implement High, Low pass filter using FFT? Thx a lot
High , Low Pass Filter using Fast Fourier Transform
Hello, guys
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Wizzer KingPosted Mar 27, 2010, 12:10 AM
Perform FFT
For high Pass Filter Set all frequencies in the data to 0 below the cutoff frequency
For Low Pass Filter set all Frequency data in teh FFT above teh Cutoff Frequency to 0
Convert From FFT to Time Domain Data
The Time Domain Data is Now Filtered
FFTW is a C library you can wrap in C# otherwise here is a web site that I found useful
http://www.sdss.jhu.edu/~tamas/bytes/fftwcsharp.html
The FFTW site also has pointers to C# at two other places