Download PTU M.Tech. ECE 2nd Semester 36210 INFORMATION THEORY and CODING Question Paper

Download PTU. I.K. Gujral Punjab Technical University (IKGPTU) M.Tech. ECE 2nd Semester 36210 INFORMATION THEORY and CODING Question Paper.

1 | M-36210 (S9)-1263

Roll No. Total No. of Pages : 02
Total No. of Questions : 08
M.Tech.(ECE) (Sem.?2)
INFORMATION THEORY & CODING
Subject Code : EC-509
M.Code : 36210
Time : 3 Hrs. Max. Marks : 100

INSTRUCTIONS TO CANDIDATES :
1. Attempt any FIVE questions out of EIGHT questions.
2. Each question carries TWENTY marks.

Q1 Explain the block diagram of modulator and demodulator of pulse code modulation. Also
derive the output signal-to- quantization noise ratio for pulse code modulation. 20
Q2 Explain :
a) Prediction and adaptive filter 10
b) Nyquist criterion for zero inter symbol interference 10
Q3 a) Explain baseband and band-pass sampling theorems. 8
b) Explain time division multiplexing and the role of sampling theorem in this for speech
signal. 12
Q4 Calculate the average code word length and coding efficiency for the message ensemble
(for M = 2) using Huffman coding scheme. 20
[X] = [ x
1
x
2
x
3
x
4
x
5
x
6
x
7
]
[P] = [ 0.4 0.2 0.12 0.08 0.08 0.08 0.04 ]
Q5 Explain :
a) Amount of information (i.e., self information) 6
b) Trellis code 7
c) Viterbi decoding algorithm 7
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1 | M-36210 (S9)-1263

Roll No. Total No. of Pages : 02
Total No. of Questions : 08
M.Tech.(ECE) (Sem.?2)
INFORMATION THEORY & CODING
Subject Code : EC-509
M.Code : 36210
Time : 3 Hrs. Max. Marks : 100

INSTRUCTIONS TO CANDIDATES :
1. Attempt any FIVE questions out of EIGHT questions.
2. Each question carries TWENTY marks.

Q1 Explain the block diagram of modulator and demodulator of pulse code modulation. Also
derive the output signal-to- quantization noise ratio for pulse code modulation. 20
Q2 Explain :
a) Prediction and adaptive filter 10
b) Nyquist criterion for zero inter symbol interference 10
Q3 a) Explain baseband and band-pass sampling theorems. 8
b) Explain time division multiplexing and the role of sampling theorem in this for speech
signal. 12
Q4 Calculate the average code word length and coding efficiency for the message ensemble
(for M = 2) using Huffman coding scheme. 20
[X] = [ x
1
x
2
x
3
x
4
x
5
x
6
x
7
]
[P] = [ 0.4 0.2 0.12 0.08 0.08 0.08 0.04 ]
Q5 Explain :
a) Amount of information (i.e., self information) 6
b) Trellis code 7
c) Viterbi decoding algorithm 7
2 | M-36210 (S9)-1263

Q6 a) Differentiate between bit and symbol error probability. Find the relation between the
two for BPSK and QPSK modulation schemes. 14
b) Compare the bandwidth efficiency of BPSK, BFSK, QPSK and 16-PSK. 6
Q7 Differentiate between coherent and non-coherent detection. Evaluate the probability of
error for coherent M-ary phase shift keying modulation technique under AWGN channel
characteristics. 20
Q8 Differentiate between linear block codes, cyclic codes and convolution codes with proper
explanation. 20









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page of Answer Sheet will lead to UMC against the Student.
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