The block diagram of C/D and D/C system is shown below. p(t) DT LTI System CT lowpass Filter xc(t) x.() Conversion of a

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The Block Diagram Of C D And D C System Is Shown Below P T Dt Lti System Ct Lowpass Filter Xc T X Conversion Of A 1 (122.19 KiB) Viewed 50 times

The block diagram of C/D and D/C system is shown below. p(t) DT LTI System CT lowpass Filter xc(t) x.() Conversion of a [n] impulse train to sequence Ha (el ya In Conversion of yp (t) sequence to impulse train yc(t) 2 2 A CT signal xc(t) has bilateral bandwidth of 10 kHz and its frequency spectrum is shown below. 1 w (rad/s) - WM 0 ωM a) (2) What is the value of wm (in rad/s)? If xc(t) is sampled using p(t) = En n=-8(t - nT) where T = 50 us. b) (2) If the time duration of xc(t) is one second, specify the total number of sample points contained in xa[n]. c) (2) Sketch the frequency spectrum of xp (t). Show important values. d) (2) Sketch the frequency spectrum of xa [n] for 2 < 31. Show important values. The DT LTI system Ha(ein) is an ideal unity gain highpass filter with cutoff frequency of 0.27. e) (2) Sketch the frequency spectrum of ya[n] for 12 = 31. Show important values. f) (2) Sketch the frequency spectrum of y(t). Show important values. If the CT signal xc(t) is applied to the following system, xc(t) Х yı(t) q(t) 25 us 1 ... . t - 50 0 50 100 (us) g) (2) Find FS coefficients of qt) for k = -1,0,1. h) (2) Sketch the frequency spectrum of yı(t). Show important values.