d Fast Fourier Transform will not adequately describe the time-domain signal when (select all that apply) is stationary

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D Fast Fourier Transform Will Not Adequately Describe The Time Domain Signal When Select All That Apply Is Stationary 1 (48.14 KiB) Viewed 65 times

d Fast Fourier Transform will not adequately describe the time-domain signal when (select all that apply) is stationary without noise; (ii) is non-stationary without noise; (iii) contains abrupt changes; (iv) is stationary and noisy; (v) is non-stationary and noisy e. After you sample x(t) at 1 kHz for a duration of 2 seconds to get 2000 samples, you perform XFT=fft(x) for the 2000 samples. Which of the following are the exact frequencies that XFT is computed at (circle all the correct answers) ( 0.25 Hz; () 0.5 Hz; (iii) 0.75 Hz; (iv) 0 Hz f. if you do a synchronized average of 16 very similar but noisy heart beats to obtain an averaged ECG, the noise amplitude of the average is x times that of the original noise. The value for x is expected to be: (1) 1/16) (11) 1/8; (lil) 1/4; (iv) 1/2; (v) 1; (vi) 2; (vii) 16