FIR filtering & FFT processing for a signal

Saanvi asked: 2021-02-22 matlab , signal , signal processing

Learn FIR filtering and FFT processing techniques for signal analysis with MATLAB. Optimize your signal processing workflows and enhance data insights. Explore

Expert Answer

Neeta Dsouza answered . 2025-07-30 17:09:31

It looks like they don't care what filter you use. Why not just use a rect filter (a box)? You can do this with just convolving with ones.

firFilter = ones(1, 21)/21; % Or whatever window width you want.
out = conv(in, firFilter, 'same');

Take the FFT of both original and filtered signals and display them. Use subplot(2,2,n) to display the 4 signals all in one figure.

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