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Introduction to Digital Communication Quiz

12 Questions

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Introduction to Digital Communication Quiz

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Questions and Answers

What is the primary focus of digital modulation in electronic communications?

Processing analog signals

Varying carrier parameters based on information signal (correct)

Transporting information through physical cables

Modulating digital microwave signals

Which type of modulation is used when both amplitude and phase are varied proportional to the information signal?

FSK

QAM (correct)

ASK

PSK

What does a high information capacity indicate in a communications system?

Efficient use of bandwidth (correct)

Lack of propagation of information

Decreased number of independent symbols

Low bandwidth and transmission time

In digital communications, what is a bit rate a measure of?

Number of bits transmitted per second Signup and view all the answers

Which law states that information capacity is directly proportional to bandwidth and transmission time?

Hartley’s Law Signup and view all the answers

What is the Shannon limit for information capacity dependent on in a communications system?

Signal-to-noise power ratio Signup and view all the answers

What does M-ary encoding in digital modulation represent?

Number of conditions or combinations possible for a given number of binary variables Signup and view all the answers

What does the term 'Baud' refer to in digital modulation?

Rate of change of a signal on the transmission medium after encoding and modulation Signup and view all the answers

In digital modulation, what is a signaling element typically represented by?

A symbol encoded as a change in amplitude, frequency, or phase Signup and view all the answers

What does the Nyquist Formula for Channel Capacity state?

The highest theoretical bit rate for a given bandwidth is 2B Signup and view all the answers

How does the capacity to propagate data change when more than two levels are used for signaling in digital modulation?

It is possible to propagate a bit rate exceeding 2B Signup and view all the answers

Which statement about Baud and bits per second relationship in higher-level systems is true?

<code>bps</code> is always greater than <code>baud</code> Signup and view all the answers