Module-I(4 marks)
- Write differences between wired fixed and wireless methods?
- Why base band signals cannot be directly transmitted in a wireless systems?
- Explain the principle of packet switching?
- List the security services offered by GSM?
- Explain Space Division Multiplexing and Frequency Division Multiplexing?
- Draw TCP/IP protocol stack and mention functions of each layer?
- What is the channel capacity for a teleprinter channel with 300 Hz bandwidth and a signal to noise ratio of 3dB,where the noise is white thermal noise?
- Is a directional antenna useful for mobile phone?Why?how can the gain of an antenna can be improved?
- How is channel capacity related to Bandwidth in noise free as well as noisy transmission channels?
- List the differences in media characteristics for wireless systems when compared to wired systems?
- What are the various types of antennas used for free space propagation in wireless networks?
