Digital Communication Questions and Answers, Set 73

Digital Communication Questions and Answers

Q1. 

Multi paths may be because of

Answer :   

1. Reflections from buildings

2. Refraction

3. Atmospheric reflections

Q2. 

Cryptosystems are used for

Answer :   

Privacy & Authentication

Q3. 

The trithemius cipher is a mono alphabetical cipher.

Answer :   

False

Q4. 

The _____ the uncertainty, the ______ is the information content.

Answer :   

Greater, greater

Q5. 

In the case of direct CDMA, interference will occur if the PN codes are

Answer :   

Non orthogonal to each other

Q6. 

Which technique is interference limited?

Answer :   

CDMA

Q7. 

Walsh cover technique is used for

Answer :   

Channelization & Spreading

Q8. 

Which serves the soft hand-off process?

Answer :   

Mobile

Q9. 

Acquisition uses ______ likelihood algorithm for acquiring the code.

Answer :   

Maximum

Q10. 

DS/BPSK includes

Answer :   

Despreading & Demodulation

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