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Principle of Superposition

A digital com...

Question

A digital communication system, with a data rate of $10^{5}$ bps is transmitted using QPSK modulation scheme. The theoretical minimum channel bandwidth required to transmit the modulated signal is equal to

A

40 kHz

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B

60 kHz

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C

50 kHz

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D

100 kHz

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Solution

The correct option is C 50 kHz
$∴ (B W)_{Q P S K} = \frac{R_{b}}{{log}_{2} (4)} \Rightarrow (B W)_{Q P S K} = 50 k H z$

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