Multiple choice

The input to a coherent detector is DSB-SC signal plus noise. The noise at the detector output is

  1. the in-phase component

  2. the quadrature component

  3. zero

  4. the envelope
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A Correct answer
Explanation

The input is a coherent detector is DSB - SC signal plus noise. The noise at the detector output is the in-phase component as the quadrature component $n_0(t)$ of the noise $n(t)$ is completely rejected by the detector.

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