EC-024/4315
B. Tech. [EC] (Semester-VII)
Examination-2014
Satellite Communication
Time: Three Hours
Maxinum Marks: 100
Note: Attempt questions from all the sections.
Section-A
(Short Answer Type Questions)
Note: Attempt any ten questions. Each question carries
4 marks. (4x10-40)
1. Explain SSP, foot print and path loss. *
Discuss the main advantages and disadvantages of
Satellite Communication system.
Explain the Receiving Parabolic reflector
Explain the Transponder of a Satellite system.
Explain Pre-emphas1s and
case of' F.M. ¥
De-emphasis in
2
Explain Azimuth angle and clevation angle.
Explain Sun outage and solar eclipse.
Explain effect of rain and ice on satellite links.
What is attenuation and atmospheric absorption?
. Explain the Binary Frequency shift keying
Transmitter.
W Explain in brief cyclic block code.Y
What are the different types of Satellite?
1 Give the advantages of microwave band and C-band-
Explain the broadcast direct to Home T.V. satellite
EDifferentiate between LEO, MEO and GEO.
Derive the expression for the equation of the orbit.
Section-B
(Long Answer Type Questions)
Note: Attempt any three questions. Each question
carries 29 marks. (20x3=60)
EC-024/4315-B-120
3
(a) Explain Time Division Multiple Access
Techniques. *
(b) Prove that C/N at the input of a detector in the
F.M. receiver is proportional to G/T.
Explain the probability of error of QPSK system
with QPSK Transmitter and Receiver. *
Explain the code division multiple access
(a)
N: kfe
B
technique in detail.
diagrama G.P.S. receiver.
N :
k l e
(b) Explain with a neat
basic elements of Satellite
(a) Explain the
Communication system.
Explain six orbital elements
with the help of
(b)
diagram.
a) Explain with diagram the operation for TI &
C system.
code in detail. *
(b) Explain the convolution
Explain in short:
( PSK system (b) Depolarization
DAMA (d) SPADE system
(c
BE-024/4315-B-120
EC-024/4315
B.Tech. (EC) (Semester-VII)
Examination-2013
Satellite Communication
Time: Three Hours
Maximum Marks:100
Note: Attempt questions from all thesections.
Section-A
(Short Answer Type Questions)
Note: Attempt any ten questions. Each question carries
4 marks. (4x10-40)
1. Differen iate between MEO, GEO & LEO.
Draw and explain block diagram of Earth Station
Receiver.
,3 Write the advantages and disadvantages of 6/4 Ghz band
Drive the expression for the equation of the orbj
Explain elevation angle and Azimuth angle
EC-024/4315-T-100
Explain Attitude control system.
Explain the block diagram of Regenerative Repeaters,
Calculate the expression of system noise temperature.
9. How rain and ice effects satellite propagation
10. Explain frequency sclective fading. x
11. Explain Error-control coding. 7
Explain the frequency division multiple access technique.
13 Compare Packet switching and circuit switching,
13
14 Explain the working of a transponder with the help of
block diagram
Define and explain Kepler's Law.
.
EC-024/43 15-T-100
3
Section-B
(Long Answer Type Questions)
Note: Attempt any three questions. Each question carries
20 marks.
(20x3-60)
Derive an equation for complete link design for a satellite
communication system.
Explain the propagation effect and their impact on
satellite earth links.
(a) Calculate overall carrier to noise ratio on an
FDMA/FM/ FDM link. *
(b) Explain TDMA & give its advantages &
disadvantages.
20 watt at a frequency of 4 Ghz
A Satellite Transmitting
Via on antenna of 18 dB gain. An earth station in a
network uses an antenna of 10M diameter
with an
etliciency of 68% *
Determine
) Gain of earth station antenna
(ii) The path loss
(111) Flux density at earth station
antenna.
(1V) Powci received at earth station
EC-024/4315-T-100
4
(a) Determine the power received by a satellite
located at 40,000 km. from the surface of Earth.
Satellite is operating at a frequency of 11 Ghz and
has EIRP of 21 dB The gain of a
.
receiving
antenna is 50.5 dB. Also explain EIRP & Path
loss.
(b) Explain the Pulse code modulation and
demodulation system.
Short notes
G) Parabolic reflecto
(ii) Convolution cod
(iii) M. Sat.
iv) Six orbital clements
EC-024/4315-T-100
