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Communication Systems

Q1: Which of the following analog modulation scheme requires the minimum transmitted power and minimum channel bandwidth?

A VSB

B DSB-SC

C SSB

D AM

ANS:C - SSB

In Am- bw= 2fm.

In dsb-sc, power efficient but bw = 2fm.

In ssb, bw = fm,,only one sideband sufficient.

In vsb, bw = fm + fv, vestige of other sideband is also transmitted.

So, ssb is the best answer.



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