Download GTU B.Tech 2020 Winter 7th Sem 171004 Wireless Communication Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 171004 Wireless Communication Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (OLD) EXAMINATION ? WINTER 2020
Subject Code:171004 Date:30/01/2021
Subject Name:Wireless Communication
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.
Q.1 (a) Define the following terms:
08
1) Forward and Reverse Channels 2) Hand over
3) Cell Dragging 4) Frequency Reuse

(b) Explain following wireless network standard in brief.
06
WLAN and Bluetooth



Q.2 (a) What is Co-channel Interference? Why does it affect performance of cellular
07
systems? Derive necessary formula to justify the above statement.

(b) Discuss Trunking and Grade of Services for wireless communications.
07




Q.3 (a) What is the basic difference between Large and Small Scale Propagation Model.
08
Derive and explain Two Ray Model in details.

(b) Discuss various propagation mechanism for large scale propagation model in
06
brief.




Q.4 (a) What is large scale and small scale fading? Discuss Rayleigh and Rician
07
distributions in brief.

(b) Discuss in detail about Impulse Response of Multipath channel in detail.
07



Q.5 (a) Differentiate and tabulate various multiple access techniques and list out the
07
benefits of TDMA.

(b) Discuss reference architecture of GSM in detail and explain role of each registers
07
of it.



Q.6 (a) What is CSMA? Describe different CSMA and explain all of them in brief.
07

(b) Explain the process of Encryption and Authentication in GSM.
07



Q.7 (a) Draw and discuss Forward Channel for IS-95 CDMA.
07

(b) Write a short note on Wi-Fi and Wi-Max
07



Q.8 (a) What is RAKE receiver? Why is it useful in IS -95 CDMA? Discuss in detail.
07
(b) Write a short note on SDR and UWB radio.
07
*************
1

---