Digital Communication Questions and Answers, Set 60

Digital Communication Questions and Answers

Q1. 

In MPSK, R/W

Answer :  

Increases with increase in M

Q2. 

How can the throughput of the system be increased?

Answer :   

1. Increasing EIRP

2. Increasing channel bandwidth

3. Decreasing system losses

Q3. 

The mixing and filtering of DSB removes

Answer :   

USB

Q4. 

The bandwidth efficiency of MFSK is

Answer :   

log2M/M

Q5. 

Greater the redundancy lesser is the bandwidth expansion.

Answer :   

False

Q6. 

Which modulation spectrum has narrow main lobe?

Answer :  

QPSK

Q7. 

In VCO the output frequency is a linear function of its input

Answer :   

Voltage

Q8. 

To avoid the loop to be driven to lock, the sweep rate should be

Answer :   

Smaller

Q9. 

The number of filters in CPM receiver structure is

Answer :   

ML

Q10. 

The synchronization necessary for BPSK is

Answer :   

1. Frequency tracking

2. Bit timing

3. Phase tracking

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