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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
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M.Code: 75797
Time: 3 Hrs.
Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
- Attempt any FIVE questions out of EIGHT questions.
- Each question carries TWELVE marks.
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- 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.
- Discuss in detail : Ergodic capacity and Outage capacity with mathematical expression in the AWGN channel.
- What is MIMO multi-user communication? Briefly discuss with the help of block diagram. How scheduling is done in the multi user scenario?
- Discuss two ray model to illustrate the multipath effect in detail. If the transmitter-receiver separation d = 100m, h1 = 10 m and h2 = 2 m, find the delay spread between two signals.
- Discuss TDMA, FDMA, CDMA and CSMA schemes in brief.
- 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? W/Hz at each receive antenna and bandwidth B = 100 KHz :
- Find SVD for H
H=0.3 0.5 0.7 0.2 - Find the capacity of this channel
- Find SVD for H
- Why successive interference cancellation is a promising technique in wireless communication? Support your answer with necessary expression and block diagram.
- How precoding is different from beam-forming? Discuss the concept of opportunistic beam forming with dumb antennas.
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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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