Question

Digital Communication (ELEC 20004)-Spring-19-cW1 (ASSMNT)-All AK 1. a. A waveform m() -62 sin (3500t+)+36 sin(4500t5 is to be uniformly sampled for digital transmission. i. Determine the sampling frequency that satisfies the Nyquist criteria, and hence (7 Marks) determine the period of the signal ii. If we want to reproduce 55 minutes of this wave form, determine the how many (8 Marks) b. The output of a digital computer is at a rate of 64 kbps. If the roll off factors (i)a 1, ii) sample values need to be stored. α-0, find the bandwidth required to transmit the data in each case, what happens to (10 Marks) bandwidth when roll off factor decreases?

Answer 1

++6 sin : 3900 4500 3S00 Sec LSOO (ii)55 minulu :33o0 Se 8361649.68152 36 (1+1)-- 131012 Ht 131·012kHz decreaAC