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T=0 or T=infinity. Any non-zero signal with finite length support in one domain has infinite support in the other domain. cos(wt) is only theoretically band-limited if infinite in length.


You want to take a signal with sample rate 30 Hz and upsample the signal to 3 kHz rate and then pass it through a low pass filter to perform the sinc interpolation. In MATLAB, you have a couple options: You could use the built-in interp function. You will need to pass it your signal and the upsample factor (3,000 / 30 = 100). The function will figure out a ...

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