Satellite Communication System Question Paper 2014

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Satellite Communication System Question Paper 2014 for BPUT M.Tech In Electronics branch is given below for download. This Satellite Communication System Question was asked in 1st semester BPUT M.Tech examination 2014 This question paper was same for the followings branches (Communication Engineering, Communication System, Electronics & Communication Engineering, Electronics & Tele Communication Engineering). Some questions are given below. You can download the full question paper from the below given download link.

Satellite Communication System Question Paper 2014

1st Semester Regular/ Back Papers 2014
Satellite Communication System
Branch : Communication Engineering, Communication System, Electronics & Communication Engineering, Electronics & Tele Communication Engineering
Time : 3 Hours
Max. Marks : 70 Marks

Q1. Answer the following questions.

a) Which type of modulation scheme is suitable for satellite system ? Justify

b) What do you mean by jamming ?

c) Mention various kinds of interference in satellite communication. How terrestrial interfernce occurs ?

d) Explain Tropospheric scintillation.

e) Explain the function of guard time in a satellite TDMA system.

f) What do you mean by SPADE system? Briefly explain

g) Write a relation between noise figure and noise temperature.h) What do you mean by subsatellite point?

i) What is multiple access ? What is the basic principle f operation of CDMA?

j) Calculate the maximum time a satellite in circular orbit is visible to a user on the surface of the earth?

2. A C Band earth station has an antenna with a transmit gain of 54 db. The transmitter output is set to 100 w at frequency of 6.10 GHz. The signal is received by a satellite as a distance of 37,500 km by an antenna with a gain of 26 db. The signal is then routed to a transponder with a noise temperature of 500k, a band width of 36 MHz, and a gain of 110 dB.

i) Calculate the path loss at 6.1 GHz

ii) Calculate the power at the output of the satellite antenna in dBW.

iii) Calculate the noise power at the transponder input in dBW.

iv) Calculate the C/N ratio in dB, in the transponder.

v) Calculate the carrier power in dBW at the transponder output.

Q3.

a) Discuss the significant properties of a PN sequence used in spread spectrum satellite system.

b) Briefly explain the principle of DSSS and FHSS.

Q6.

a) With proper block diagram describe a typical tracking, telemetry, command and monitoring system.

b) What is the role of satellite transponders ? With proper block diagram explain the working of a double conversion transponder.

Q8. Describe any TWO from the following.
a) Spread Spectrum Transmission and Reception
b) Orbital effect in Communication system performance
c) Satellite mobile service
d) VSAT System

Updated: December 20, 2015 — 12:56 pm

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