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 Explain in brief Adaptive Delta Modulation.
15
OR
Q.1 What is Inter symbol interface and Explain its effect an causes.
15
Q.2 Explain the basic principal of QAM with the help of waveform.
15
OR
Q.2 Draw and explain block diagram of BPSK transmitter and receiver.
15
Q.3 Draw the block diagram of FSK system and explain its Waveform.
5
Q.4 Describe various techniques of Sampling Theorem.
5
SECTION-B
Q.5 Explain Baud Rate and Bit Rate and compare both with examples.
15
OR
Q.5 Compare Slow and fast frequency hopping and state application of
DSSS and FHSS.
15
Q.6 Explain FDMA systems with Schematic diagram.
15
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 PN Sequence? Generate PN sequence of length 15.
5
Computer Generated Random Question Paper dated: 07-07-2015 15:02:47
***BEST OF LUCK***