A signal transmission system for telephone lines over microwave links consists of of FDM-SSB and FM signaling. Each of the bandlimited signals m (t) has bandwidth of W=6 KHz and modulates carrier si

A signal transmission system for telephone lines over microwave links consists of of FDM-SSB and  

FM signaling. Each of the bandlimited signals m

(t) has bandwidth of W=6 KHz and modulates

carrier signals C

i

(t) = 10 cos 2π f

ci

i

t using USSB method, where f

= (i − 1)W, 1 ≤ i ≤ K. The

combined FM modulated signal m(t) with a modulation index of β.is then transmitted on a carrier

signal with amplitude of 20 and frequency f

(Figure Q4).  

c

Figure Q4.  

ci  

a)                                                                                                                                            [5 Marks]