- Problem 1 7 For Each Of The Following Modulation Cases Below Sketch I The Message Wave Form M T Ii The Mod 1 (93.19 KiB) Viewed 35 times
= Problem 1. (7%) For each of the following modulation cases below, sketch (i) the message wave- form m(t), (ii) the modulated waveform s(t), (iii) the message magnitude spectrum M(f), and (iv) the modulated spectrum (S(f)); and thereby (v) determine the transmission bandwidth Bt. (a) Classical AM, m(t) = A · rect(t/Tp), where To = 10–3 seconds; A = L+3 where L is the last digit of your student ID number; assume Ac = 2 and fc = 100MHz; Choose an appropriate amplitude sensitivity ka such that overmodulation is avoided. (b) SSB-SC, m(t) is generated by: cos(27 fit) X m(t) cos(2 f2t) Figure: Generator of m(t). where the carrier has Ac = 3 and fc = 30Hz; the input frequencies are fi = 5Hz and f2 = 9Hz.