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signal reconstruction from fft data using matlab?

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manasiri

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signal reconstruction matlab

dear explorer,

I measured (sampled) a weak signal with 100 msps 14 bit Gage A/D converter card.

then I give the FFT of the signal and find two important frequency band of possibly wanted signal.

how I can reconstruct time domain signal using digital mixing at specific frequency band (with matlab)??

If it possible to mixing and reconstruction of a signal from FFT ??

thanks alot.
 

fft signal reconstruction

Hi

Just make a new vector of data where you include only the data you consider valuable and replace the other values with zeros. Then take the inverse Fourier transform:

filtered_data_time = real(ffttshift(ifft(new_vector)));

Sal
 

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    manasiri

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