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Questions and Answers
What is the main purpose of modulation in communication systems?
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?
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?
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?
What does the bit rate of an A/D process depend on?
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How can quantization error in an A/D process be improved?
How can quantization error in an A/D process be improved?
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