BiomedicalSignalProcessing_Homework_1

BiomedicalSignalProcessing_Homework_1 - Mmtaz DEMRC...

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Mümtaz DEM İ RC İ 130206001 Biomedical Signal Processing Homework 1 1) ECG Signal sample is attached as an .mat fle 2) function homework1_2 t=0:0.01:5; x1=sin(2*pi*0.3*t); fft_x1=fft(x1); figure;plot(fft_x1); axis 'tight' ; title( 'ftt of the signal' ); figure;plot(abs(fft_x1)); axis 'tight' ; title( 'absolute ftt of the signal' ); end iF the Fourier transForm is directly plotted, we see a meaningless graph.This graph is shown below. ±ourier transForm has the shape that it does because it has complex values.
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3) function homework1_3 t=0:0.01:5; x2=sin(2*pi*0.45*t); fft_x2=fft(x2); subplot(2,1,1);plot(x2); axis 'tight' ; title( 'original signal' ); subplot(2,1,2);plot(abs(fft_x2)); axis 'tight' ; title( 'fft of original signal' ); end
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function homework1_4 t=0:0.01:5; x1=sin(2*pi*0.3*t); x2=sin(2*pi*1.45*t); figure; stem(x1, 'k' ); hold on ;stem(x2, 'g' ); title( 'x1 and x2 in the time domain' ); legend( 'x1' , 'x2' ); figure; plot(abs(fft(x1)), 'k' , 'LineWidth' ,2); hold on ;plot(abs(fft(x2)),
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BiomedicalSignalProcessing_Homework_1 - Mmtaz DEMRC...

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