Download Model question papers & previous years question papers
Submit Previous Years University Question Papers
Posted Date: 11 Dec 2011 Posted By:: shinuraj Member Level: Bronze Points: 5 (Rs. 1)
2011 Anna University of Technology Tirunelveli B.E Computer Science and Engineering Cs 36-analog and digital communications Question paper
1.What is modulation index for AM?
2.Distinguish between FM and PM?
3.What are the advantages of qpsk?
4.Draw the psk and fsk signals for the binary signal s(t)=1011001.
5.What is quantisation noise?
6.What are the advantages and disadvantages of digital transmission?
7.Which error detection technique is simple and which one is more reliable?
8.Define data modem?
9.What are the types of frequency hopping?
10.Define PN sequence.
11. (a) (1)Explain the frequency analysis of angle modulated waves. (10)
(2)Write short notes on bandwidth requirements for angle modulated waves (6)
(b)Derive the expression for the AM waves,and also plot its spectrum. (16)
12.(a) (1)Draw and explain FSK transmitter and receiver. (10)
(2)Explain in detail about QAM. (6)
(b) With neat diagram,explain principle of QPSK technique. (16)
13.(a) (1) Explain in detail the delta modulation transmitter and receiver. (10)
(2)Discuss the drawbacks of delta modulation and explain the significance of adaptive delta modulator. (6)
(b) Write short notes on
(1)Differential pulse modulation (10)
(2)Intersymbol Interference (6)
14.(a)Explain about Synchronous and Asynchronous modem. (16)
(b)Describe data communicationcodes(16)
15.(a)With the help of block diagrams and wave form,explain about DS spreadspectrum with coherent binary PSK. (16)
(b) (1)Explain in detail about TDMA in wireless communication techniques. (10)
(2)What are pseudo noise sequences?How are they generated? (6)
Return to question paper search
and make money from adsense revenue sharing program
Are you preparing for a university examination? Download model question papers
and practise before you write the exam.