Download PTU. I.K. Gujral Punjab Technical University (IKGPTU) M.Tech. ECE 2nd Semester 76067 ADVANCED WIRELESS COMMUNICATION Question Paper.
Roll No. Total No. of Pages : 01
Total No. of Questions : 08
M.Tech. ECE (Wireless Communication) (2018 Batch) (Sem.?2)
ADVANCED WIRELESS COMMUNICATION
Subject Code : MTWC-103-18
M.Code : 76067
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1.Attempt any FIVE questions out of EIGHT questions.
2.Each question carries TWELVE marks.
Ql. a) What is fading? List and explain various types of small scale fading. 6
b) Differentiate between frequency flat and frequency selective fading. 6
Q2. a) Derive the expression of complex fading coefficient for narrowband signal. 6
b) Explain the Rician and Rayleigh fading channel models. 6
Q3. a) Explain the modulator and demodulator block diagrams of QPSK system. 8
b) Explain all the characteristic of AWGN channel. 4
Q4. a) Derive the expression of probability of error for BPSK system. 8
b) Arrange the digital modulation schemes BPSK, 16- PAM, 8-MPSK, 16-QAM in the
increasing order of their respective error probabilities. 4
Q5. a) Explain the process of multicarrier modulation with overlapping sub-channels. 6
b) What are the different challenges in multicarrier systems? Explain in detail. 6
Q6. Explain in detail :
a) Use of cyclic prefix in OFDM system 4
b) Frequency offset synchronization accuracy in OFDMA system. 4
c) Random frequency hopping in OFDMA system. 4
Q7. a) Prove that the OFDM system converts the delay spread channel into a set of parallel
fading channels, using the concept of cyclic prefix. 9
b) Explain the need of IFFT block in OFDM transmitter block diagram. 3
Q8. Determine the error probability for different fading channels with diversity reception. 12
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 13 December 2019