# Download PTU M.Tech. ECE 1st Semester 75797 WIRELESS COMMUNICATION Question Paper

Download PTU. I.K. Gujral Punjab Technical University (IKGPTU) M.Tech. ECE 1st Semester 75797 WIRELESS COMMUNICATION Question Paper.

1 | M-75797 (S35)-589

Roll No. Total No. of Pages : 01
Total No. of Questions : 8
M.Tech. ECE (Wireless Communication) (2018 Batch) (Sem.?1)
WIRELESS COMMUNICATION
Subject Code : MTWC-101-18
M.Code : 75797
Time : 3 Hrs. Max. Marks : 60

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

1. Compare classical MRRC scheme with two branch diversity with one receiver 2?1.
schemes for transmission and reception ends. Also explain the concept of soft failure.
2. Discuss in detail : Ergodic capacity and Outage capacity with mathematical expression in
the AWGN channel.
3. What is MIMO multi-user communication? Briefly discuss with the help of block
diagram. How scheduling is done in the multi user scenario?
4. Discuss two ray model to illustrate the multipath effects in detail. If the transmitter-
receiver separation d = 100m, h
t
= 10 m and h
r
= 2 m, find the delay spread between two
signals.
5. Discuss TDMA, FDMA, CDMA and CSMA schemes in brief.
6. Consider a 2 X 2 MIMO system with channel gain matrix is given by H. Assume H is
known at transmitter and receiver and the total transmit power P = 10 mW is available
across two transmit antennas. Assume No= 10
?9
W/Hz at each receive antenna and
bandwidth B = 100 KHz :
0.3 0.5
H
0.7 0.2
? ?
?
? ?
? ?

a) Find SVD for H
b) Find the capacity of this channel
7. Why successive interference cancellation is a promising technique in wireless