1.

For a message signal (t) = cos(2πfc t) and carrier of frequency. Which of the following represents a single side-band (SSB) signal? (a) cos(2πfm t) cos(2πfc t) (b) cos(2πfc t) (c) cos(2π(fc + fm )t (d) [1 + cos(2πfm t)]. cos(2πfc t)

Answer»

(c) cos(2π(fc + fm )t 

Option (a) in the problem represents AM signal DSB-SC. If will have both side bands 

option (b) represents only the carrier frequency 

Option (c), cos(2π(fc + fm )t represents upper side band (SSB-SC). It represent SSB signal 

Option (d) represents the conventional AM signal



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