My Profile
Active Members
TodayLast 7 Days
more...
Awards & Gifts
Online Exams
Fresher Jobs
Our fresher job section is exclusively for fresh graduates! Find jobs for freshers in major Indian
cities including Bangalore, Chennai, Hyderabad, Pune or Kochi
Resources
Find educational articles, blogs, discussion threads and other resources.
Colleges
Find details about any college in India or search for courses.
|
Download Model question papers & previous years question papers
|
Posted Date: 26 Jan 2009 Posted By: ravikanth Member Level: Gold
|
2008 Jawaharlal Nehru Technological University, Hyderabad Electronics & Communications Engineering IV B.Tech I Semester Regular Examinations, November 2008 SATELLITE COMMUNICATIONS Question paper
Code No: R05410409 Set No. 1
IV B.Tech I Semester Regular Examinations, November 2008
SATELLITE COMMUNICATIONS
( Common to Electronics & Communication Engineering and Electronics &
Telematics)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. Discuss in detail the Design Consideration of a Satellite Communication Systems.
[16]
2. (a) What is a Geosynchronous Orbit? Discuss the advantages and disadvantages
of these orbits.
(b) What are Orbital Perturbations? Explain the effects of earth’s oblateness on
orbital inclination of Geosynchronous Satellite. [8+8]
3. (a) Write short notes on “Telemetry Tracking and Command System”.
(b) Explain the importance of reliability in the design and construction of Satel-
lites. [8+8]
4. (a) What are the factors that effect the uplink and down link design in geo sta-
tionary satellite system. Discuss in detail.
(b) For an EIRP of 100 dBW, a carrier frequency of 10 GHz and the distance
between earth station and satellite of 36000Km. Calculate the CNR in 10MHz
bandwidth if the ground station G/T is 20 dB/K. [8+8]
5. A BPSK TDMA system is to transmit 1000 digital voice channels, each with 4 bits
per sample at a 64kbps rate. The system must accommodate 1000 data bits/slot
at a frame efficiency of 90%.
(a) What is the number of slots in a frame?
(b) What is the length of TDMA frame?
(c) How many preamble bits can be used?
(d) What is the required satellite bandwidth? [16]
6. (a) What are the functions of Earth station Tracking system to be performed?
(b) Explain the functional elements of a satellite tracking system? [6+10]
7. (a) Explain the general aspects of coverage and frequency considerations of low
earth orbit.
(b) Why L-band is allocated for mobile satellite service? [8+8]
8. Explain about:
(a) GPS receiver
(b) GPS codes.
Return to question paper search
|
|
|
Submit Previous Years University Question Papers and make money from adsense revenue sharing program
Are you preparing for a university examination? Download model question papers
and practise before you write the exam.
|
|