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    Question

     In a digital communication system’s block diagram,

    which of the below components can be found at the receiver?
    A Demodulator Correct Answer Incorrect Answer
    B Channel encoder Correct Answer Incorrect Answer
    C Modulator Correct Answer Incorrect Answer
    D Source encoder Correct Answer Incorrect Answer

    Solution

    The correct answer is Demodulator , because at the receiver side of a digital communication system, the incoming modulated signal must be demodulated to recover the original baseband data before decoding. ●      Channel encoder → used at the transmitter to add redundancy for error detection and correction. ●      Modulator → used at the transmitter to map digital data onto a carrier. ●      Source encoder → used at the transmitter to compress or represent source information efficiently.

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