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Q. 1.1.17

For a message signal $m(t)=\cos \left(2 \pi f_{m} t\right)$ and carrier of frequency $f_{c}$, which of the following represents a single side-band (SSB) signal?

(a) $\cos \left(2 \pi f_{m} t\right) \cos \left(2 \pi f_{c} t\right)$

(b) $\cos \left(2 \pi f_{c} t\right)$

(c) $\cos \left[2 \pi\left(f_{c}+f_{m}\right) t\right]$

(d) $\left[1+\cos \left(2 \pi f_{m} t\right)\right] \cos \left(2 \pi f_{c} t\right)$

Verified Solution

$\cos \left(2 \pi\left(f_{c}+f_{m}\right)(t)\right.$ represents only USB of A.M – SSB/ SC signal.
Hence, the correct option is (c)