Digital Communication Questions and Answers, Set 51

Digital Communication Questions and Answers

Q1. 

Which has higher error probability performance?

Answer :  

Bipolar base-band signalling

Q2. 

Entropy calculation returns

Answer :  

Deterministic number

Q3. 

To achieve high signal to noise ratio, delta modulation must use

Answer :  

Over sampling

Q4. 

Modulation process includes

Answer :  

Digital to analog conversion

Q5. 

Analogue switches provides

Answer :  

1. Good bandwidth

2. Low distortion

3. Low cost

Q6. 

Which modulation technique have the same bit and symbol error probability?

Answer :  

1. BPSK

2. DPSK

3. OOK

Q7. 

Which has the maximum power efficiency?

Answer :  

Class C

Q8. 

Coherent demodulation of FSK signal can be performed using

Answer :  

Matched filter

Q9. 

In an ideal TDM system, the cross correlation between two users of the system is

Answer :  

0

Q10. 

In finite state machines, output is predicted using

Answer :  

Past output & Present input

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