WC LTE 4G Module 1 and 2 important questions

1. Important questions for 1st IA Test (WC LTE 4G- 15EC81)
MODULE 1
1. Briefly explain key enabling technologies in OFDM.
2. Briefly explain flat LTE SAE architecture.
3. Explain the advantages of OFDM for LTE.
4. With a neat diagram, explain adaptive modelling and coding.
5. Explain various empirical channel models
6. Explain path loss and shadowing.
7. Explain statistical channel models.
8. Define the following, (a) Doppler spread, (b) Coherence time, (c) Angular spread, (d)
Coherence distance.
MODULE 2
9. With a neat block diagram, explain OFDM communication system.
10. With a neat block diagram, explain SC-FDMA uplink transmitter.
11. Explain the need of timing and frequency synchronization.
12. Explain spatial diversity with array gain and diversity gain.
13. Briefly explain spatial multiplexing with open loop MIMO.
14. Briefly explain multiple antenna transmission and reception.
15. What is PAR and explain the PAR problem.