Answer Happy

d What is the total duration of the ECG record in seconds? e. Did you find power line interference in your analysis? If so, at which frequency? f. If you found interference at a specific frequency, design a Notch filter, give the filter coefficients, find the transfer function, give the pole-zero plot, filter the signal and eliminate the interfering component 9. Plot the magnitude spectrum of the notch-filtered signal using the DFT in order to verify that the interfering component was eliminated h. Plot the notch-filtered signal in the time domain to verify that the interfering component is gone and that the signal trace is smoother. Hint Follow the notch-filter design in this module and adapt the MATLAB code to handle the new data. Remember to update the sampling frequency Fs.
This is a continuation of the interactive discussion board activity in Module 10. Upload the ECG signal PruebalTab.txt, which was acquired at Fs=1600 Hz, using these MATLAB lines load PruebalTab.txt; ecg1= PruebalTab(:, 2); $preserves original signal ecg = ecg1 $preserves a copy of the original signal a. Plot the signal in the time domain with the time axis in seconds b. Plot the magnitude spectrum using the DFT as a function of frequency in Hz. c. Assuming a rectangular window, what is the frequency resolution in Hz afforded by your spectral analysis using the DFT? d What is the total duration of the ECG record in seconds? e e Did you find power line interference in your analysis? If so, at which frequency? f. If you found interference at a specific frequency, design a Notch filter, give the filter coefficients, find the transfer function, give the pole-zero plot, filter the signal and eliminate the interfering component, 9 g Plot the magnitude spectrum of the notch-filtered signal using the DFT in order to verify that the interfering component was eliminated