Satellite Communication — Winter 2022

Define following terms: (1) Apogee (2) Perigee (3) Line of apsides

Draw and explain the block diagram of satellite communication in detail.

Explain advantages of satellite communication over terrestrial communication.

What is sun synchronous orbit?

List the orbital elements and explain each of them in detail.

Explain three laws of Kepler’s for planetary motion in detail.

Give comparison of LEO, MEO and GEO satellite orbits and gives application also.

What is station keeping?

Briefly describe the three-axis method of satellite stabilization.

Draw and explain block diagram of TT & Csystem for communication satellite.

Give the difference between Attitude control and Orbital Control.

Write short note on Satellite Antennas.

Explain Single conversion transponder and Double conversion transponder in detail.

Define following terms. (1) Noise factor (2) Noise Temperature (3) Carrier to Noise ratio

Explain various uplink path losses in satellite communication.

Explain how to compute uplink and downlink C/Nratios for a typical satellite link.

What is EIRP? Show the relationship between Power flux density and EIRP.

Derive Friis transmission equation for received power in any radio link.

Define Downlink. Draw a pictorial representation of a Downlink. Show the power budget calculations for a downlink path.

What is CBTR (Carrier and bit time recovery)?

List the advantage and disadvantage of FDMA, TDMA and CDMA.

Explain briefly code division multiple access.

Compare FDM/FM-FDMA and SCPC-FDMA

Give the difference between Multiplexing techniques and Multiple access techniques.

Explain the SPADE system.