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- A signal is 1 for and otherwise (an impulse). What is
its (-point) Fourier transform as a function of ?
- For what integer values of is the Fourier transform of the -point
Hann window function nonzero?
- Suppose an N-point Fourier transform is done on a complex sinusoid of frequency
where is the fundamental frequency. What percentage
of the signal energy lands in the main lobe, channels and ? If the signal
is Hann windowed, what percentage of the energy is now in the main lobe (which
is then channels 1 through 4)?
Miller Puckette
2006-09-24