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Topic: Using an ideal LPF filter on fft( ) in MATLAB
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Posts: 1
Registered: 12/4/13
Using an ideal LPF filter on fft( ) in MATLAB
Posted: Dec 4, 2013 11:05 AM
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abs(fft(x)) results in a peak on the LHS of the spectrum, and its reflected one on the RHS.

If I implemented an ideal LPF by simply setting inner values (between the two peaks) to zero, do I set the real part of fft(x) to zero, or do I set the real and imaginary parts of fft(x) to zero?

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