Communication Resources Allocation

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This set of Digital Communication online quiz focuses on “Evaluating Digital Communication System and Allocation of Communication Resources”.

1. Which refers to the presence of error correction coding scheme?
a) Coded
b) Uncoded
c) Coded & Uncoded
d) None of the mentioned

2. The system will be more bandwidth efficient as WTb decreases.
a) True
b) False

3. In MPSK, R/W
a) Increases with increase in M
b) Increases with decrease in M
c) Decreases with increase in M
d) Is not dependent on M

4. In MFSK, R/W
a) Increases with increase in M
b) Increases with decrease in M
c) Decreases with increase in M
d) Is not dependent on M

5. Which modulation is selected for power limited system?
a) MPSK
b) MFSK
c) MPSK & MFSK
d) None of the mentioned

6. The transmission rate is given as
a) R/log2M
b) log2M/R
c) R/log10M
d) log10M/R

7. Code’s redundancy is given as
a) n/k
b) k/n
c) nk
d) None of the mentioned

8. For more than two quantization level, _______ is used.
a) Hard decision
b) Soft decision
c) Hard & Soft decision
d) None of the mentioned

9. How can the throughput of the system be increased?
a) Increasing EIRP
b) Increasing channel bandwidth
c) Decreasing system losses
d) All of the mentioned

10. In which technique spot beam antennas are used to point the radio signals in different directions?
a) Code division
b) Space division
c) Frequency division
d) None of the mentioned

11. In polarization division technique ______ polarization is used.
a) Orthogonal
b) Non orthogonal
c) Orthogonal & Non orthogonal
d) None of the mentioned

12. Channelization characterized by orthogonal spectra is called as
a) Time division multiplexing
b) Frequency division multiplexing
c) Time division & Frequency division multiplexing
d) None of the mentioned

13. In double side band spectrum which side-band is called as inverted side-band?
a) LSB
b) USB
c) LSB & USB
d) None of the mentioned

14. The mixing and filtering of DSB removes
a) LSB
b) USB
c) LSB & USB
d) None of the mentioned

15. The super group is made up of
a) Five groups
b) Sixty channels
c) Five groups & Sixty channels
d) None of the mentioned
View AnswerAnswer: c
Explanation: In FDM multiplex hierarchy, the first level is composed of five channels. The second level consists of five groups or 60 channels.

16. The orbital period of communication satellites is _______ as that of earth’s rotational period.
a) Same
b) Greater
c) Lesser
d) None of the mentioned

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