M.Sc. DEGREE EXAMINATION, FEBRUARY 2018.
Fourth Semester
Physics
Paper IV COMMUNICATION SYSTEMS AND DIGITAL SIGNAL
PROCESSING
(Non CBCS Old Regulation)
2 20744
Time 3 Hours Max. Marks 100
SECTION — A
(Short Answer Type Questions)
Answer any FIVE of the following. 8 40 Marks)
All questions carry equal marks.
1. Define the terms Frequency reuse and call splitting.
2. Write a short note on first and second generation cellular telephone systems.
3. What are Kepler's law?
4. Describe spacing frequency allocation.
5. Obtain the periodic sampling of cosine signal.
6. Differentiation Aliasing and Antialiasing filters.
7. Explain bilinear transformation.
8. Define Gibbs effect.
SECTION — B
Answer ALL questions. 15 60 Marks)
All questions carry equal marks.
9. Explain various handoffs and describe in detail cellular system topology.
Or
Define in detail GSM network.

10. Describe Geosynchronous satellites and explain antenna look angles.
Or
Discuss some of satellite system link models and define some of satellite
systems parameters.
11. Define the periodicity of a DSP system and obtain its frequency response.
Or
Obtain the digital filter specification of low pass and high pass filters.
12. Design on IIR filter using Impulse invariant technique.
Or
Explain the terms hamming window and Bartlett windows.