Digital and Analog Communication Quiz
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Questions and Answers

What is the main purpose of modulation in communication systems?

  • To downshift the frequency of transmission for practical transmission through free space
  • To decrease the power of the transmitted signal
  • To upshift the frequency of transmission for practical transmission through free space (correct)
  • To increase the power of the transmitted signal

    • What is the relationship between the Nyquist sampling rate and the bandwidth of the analog signal?

  • The Nyquist sampling rate is twice the bandwidth of the analog signal (correct)
  • The Nyquist sampling rate is half the bandwidth of the analog signal
  • The Nyquist sampling rate is unrelated to the bandwidth of the analog signal
  • The Nyquist sampling rate is equal to the bandwidth of the analog signal

    • What is the purpose of quantization in the analog-to-digital conversion process?

  • To increase the resolution of the analog signal
  • To map the continuous amplitude values of the analog signal to a finite set of discrete values (correct)
  • To decrease the sampling rate of the analog signal
  • To eliminate the need for encoding the digital signal

    • What does the bit rate of an A/D process depend on?

    <p>Number of bits and sample frequency</p> Signup and view all the answers

    How can quantization error in an A/D process be improved?

    <p>By increasing the number of quantization levels (increasing resolution)</p> Signup and view all the answers

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