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Communication SystemsDemodulation

Coherent detection requires the receiver to have?

  • AA locally generated carrier with correct frequency and phase reference
  • BNo oscillator
  • COnly a diode and capacitor
  • DAn infinite bandwidth antenna
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Correct Answer: A. A locally generated carrier with correct frequency and phase reference
Explanation: Synchronous or coherent detection multiplies the received signal by a locally generated carrier synchronized in frequency and phase.
Reference: Standard communication systems: demodulation
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