B.TECH - Semester 8 satellite and mobile communication Question Paper 2008 (may)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- What are geostationary satellites and its advantages
- A satellite TV signal occupies the full transponder bandwidth of $36 \mathrm{MH}_{\mathrm{z}}$ and it must provide a $\mathrm{C} / \mathrm{N}$ ratio at the destination earth station of 22 dB . Given that the total transmission loss is 210 dB and the ...
- Explain the reasons as to why uplinking frequency is different than the downlinking frequency
- Explain how sectoring improves the capacity of cellular system.
- Briefly list the factors influencing small scale fading.
- Describe Okumara outdoor propagation model.
- Explain time dispersion and frequency selective fading.
- Write the importance of synchronization in spread spectrum systems.
- What is near far effect in CDMA
- Write a short note on smart Antennas. ( $\mathbf{1 0} \boldsymbol{\times} \mathbf{4 = 4 0}$ Marks) P.T.O. Answer any two full questions from each module, each question carries 10 marks.
- Write a short note on Satellite Launchers. With a diagram explain the launching procedure of placing a satellite into a geostationary orbit
- Explain about the satellite orbital parameters in detail
- Derive an expression for the resulting downlink signal, after the uplink, crosslink and downlink transmissions have taken place.
- What is the need for frequency reuse? Explain the frequency reuse concept and prove that $N=I^{2}+I J+J^{2}$ where $N$ is the number of cells per cluster
- Explain the impulse response model of a multipath channel.
- Explain the details and briefly compare SDMA/FDMA/TDMA/CDMA mechanisms.
- Explain the fundamental concepts of direct sequence spread spectrum modulation system.
- Describe the principle of Multiuser Detection with examples.
- Write note on (a) Ergodic Capacity
- Write note on (b) MIMO Antenna Systems