Question Paper: Mobile Communication Question Paper - December 2016 - Electronics and Telecom Engineering (Semester 8) - Savitribai Phule Pune University (SPPU)
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Mobile Communication - December 2016

SPPU Electronics and Telecom Engineering (Semester 8)

Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Solve any one question Q.1(a,b,c) and Q.2(a,b,c)

1(a) Explain the timing sequence of signals exchanged & signal exchange diagram for local call. 8 marks

1(b) Distinguish between in band and out band signaling. 8 marks

1(c) Explain different Channel Assignment Stratgies. 8 marks

2(a) With neat diagrams explain evolution of message switching. 8 marks

2(b) Design two stage switching network for ceonnecting 100 incoming trunks to 100 outgoing trunks & find number of cross point. 8 marks

2(c) Explain the factors influencing Small scale fading. 8 marks

Solve any one question Q.3(a,b,c) and Q.4(a,b,c)

3(a) State and explain different types of channels used in AMPS. 8 marks

3(b) Draw a neat diagram of GSM Architecture and explain the function of each block in it. 8 marks

3(c) With a proper diagram explain MS registration in GSM network. 8 marks

4(a) Explain in Handover mechanism in AMPS> 8 marks

4(b) With a neat digram expalin
i) Intra-cell Handover
ii) Inter-cell Handover
8 marks

4(c) Compare between GSM900 and DCS 1800. 8 marks

Solve any one question Q.5(a,b,c) and Q.6(a,b,c)

5(a) Draw a neat diagram & explain block scheme of GSM Half Rate encoder. 8 marks

5(b) Write short note on Radio Link Protocol (RLP). 8 marks

5(c) State and explain different logical channel used in GPRS. 8 marks

6(a) Explain data transmission in GSM network. 8 marks

6(b) Draw and explain the GSM network architecture for SMS service. 8 marks

6(c) Write short note on GPRS services. 8 marks

Solve any one question Q.7(a,b,c) and Q.8(a,b)

7(a) Draw & explain basic transmitter structure for DS-CDMA. 8 marks

7(b) Compare between technical parameters of WCDMA & IS-95 8 marks

7(c) Givn that the IS-95 CDMA digital cellular systems require 3 dB<sr&lt;9 db="" whcih="" employs="" qpsk="" modulation="" scheme="" and="" convolution="" coding="" techique.="" the="" bandwidth="" of="" channel="" is="" 1.25="" mhz="" transmission="" data="" rate="" rb="9.6kbps." determine="" capacity="" single="" is-95="" cell.&lt;="" span=""> </sr&lt;9> 8 marks

8(a) Explain the disadvantages of FDMA &TDMA system & motivation for CDMA as a potential multiple access method. 8 marks

8(b) Draw the block diagram of Rake receiver & explain its operation. 8 marks

10(c) What are the various methods used for TTS. 8 marks

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