Communication Systems

Communication Systems

University

20 Qs

quiz-placeholder

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Communication Systems

Communication Systems

Assessment

Quiz

Other Sciences

University

Practice Problem

Hard

Created by

Charles Martinez

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In analog transmission waveform shape itself carries the needed info.

Yes receiver should detect the waveform correctly

No receiver already know the transmitted signal waveform so detection of the waveform not required.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which relation is the worst in terms of efficient bandwidth usage if the channel capacity is (C) and data rate is R

R < C

R > C

R=C

C >> R

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If two vector is orthogonal then their similarity is zero.

True

False

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If the correlation coefficient is 1 for two signal pair x and g? What you can say about these signals? You can choose more than one answer?

They are certainly the same signals

They are aligned vector in vector analogy but they might be different signals.

Autocorrelation of each signal should be known to evaluate the similarity

They are orgthogonal signals

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

An AM transmitter generates 100 watts with 0% modulation. How much power will it generate with 20% modulation?

To answer we need to know carrier amplitude

102 watts

100 watts

20 watts

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

You look at an AM signal with an oscilloscope and see that the maximum Vpp is 100 volts and the minimum Vpp is 25 volts. What is the modulation index?

0.6

0.5

1/4

can not be calculated

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Increasing the bandwidth of channel by twice the capacity will increase with same rate.

Yes

No

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