B.TECH - Semester 6 data communication Question Paper 2019 (jun)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- What are the main components of communication model?
- Define simplex, half duplex and full duplex communication.
- Write transmission characteristics of twister pair cable.
- How does synchronous differ from asynchronous transmission?
- State and explain sampling theorem.
- What are different analog modulation techniques?
- Explain DWDM technique.
- Explain parity check error detection method.
- What are the principles behind a circuit switching network?
- Write the features of GSM technology. Answer any one full questions from each Module.
- (a) Explain time domain and frequency domain concept of a signal in a communication system.
- (b) Explain following transmission impairments :
- (i) Delay distortion (ii) Noise.
- (a) Define Channel Capacity. Explain Shannon's channel capacity formula. Signal to Noise Ratio is often given in decibels. Assume SNR ${ }_{\mathrm{db}}=36$ and the channel bandwidth is 2 Mhz . Calculate theoretical channel capacity.
- (b) Explain following wireless propagation modes
- (i) Terrestrial microwave (ii) Satellite microwave.
- (a) Explain following digital to digital encoding techniques.
- (i) NRZ (ii) Biphase (iii) Multilevel binary. 10
- (b) Explain the working principle of Pulse Code Modulation (PCM). OR
- (a) Explain following technologies :
- (i) ASK (ii) FSK (iii) PSK.
- (b) Discuss Delta modulation technique.
- (a) Find CRC for following : $\mathrm{P}=1001$ and $\mathrm{M}=11010011$. 10
- (b) Explain working principle of GPRS. OR
- (a) Explain the virtual circuit approach in a packet switching network.
- (b) Write short notes on following wireless communication technique.
- (i) WiFi (ii) WiMax.