August
V63/T04053/EE/20150814
2015
Digital Communication
Instructions:
Marks-80
Time: 3 Hrs
1. All questions are compulsory.
2. “Long Answer type Question (LAQ)” is a supply type
question of 15 marks which required a typical answer of about
60-80 lines in bout 32-40 minutes.
3. “Sort Answer type Question (SAQ)” is a supply type question
of 5 marks which required a typical answer of about 15-20 lines
in bout 08-10 minutes.
4. Figures to the right indicate marks allotted to the questions.
5. Assume suitable data if necessary
6. Use a nonprogrammable type of scientific calculator is
allowed
Marks
SECTION-A
Q.1 What is DPCM? Write Down Advantages and Disadvantages.
15
OR
Q.1 Explain in brief Adaptive Delta Modulation.
15
Q.2 Explain with Spectrum bandwidth requirement of QPSK.
15
OR
Q.2 Distinguish between DPSK, BPSK and QPSK.
15
Q.3 What are the advantages and disadvantages of Digital
Communication.
5
Q.4 State Channel Capacity and give its equation.
5
SECTION-B
Q.5 Describe how is the SS signal is different from Normal Signal.
15
OR
Q.5 Describe FH-SS system in detail with bock diagram of transmitter
and receiver.
15
Q.6 Describe multiplexing Hierarchy.
OR
Q.6 Compare FDMA, TDMA and CDMA on the basis of following
parameters.
15
Q.7 What is a WDM system?
5
Q.8 What is the necessity of spread spectrum modulation?
5
Computer Generated Random Question Paper dated: 07-07-2015 15:06:48
***BEST OF LUCK***
15