Pondicherry University 2008 B.Tech Electronics and Communications Engineering spread spectrum comminication / - exam paper

7th semester
november/december 2008
spread spectrum communication
electronics and communication


time three hrs

unit 1:
1 a) discuss the processing gain and other fundamental parameters(7)
b)discuss about jamming methods(8)
or

2 discuss the subsequent
a)correlation properties(7)
b) gold codes(8)

unit 2
3 a)draw the diagram of DS-BPSK system and explain(7)'
b) derive the bit fault probability of DS-BPSK system(8)
or
4 a)write the concept of pulse jammer(7)
b) explain the concept of multitone jammer (8)

unit 3
5 a)write the advantages of frequency hopping compared to direct sequence system(7)
b)draw the non coherent FH system model and explain(8)
or
6 a)discuss the performance of FH/QPSK system(7)
b) explain trhe performance of FH/DPSK system(8)
UNIT 4
7 a) write the concept of acquisiton
b)discuss the acquisiton techniques used in spread spectrum
or
8 a)write the concept of tracking
b)explain tau-dither loop method
unit 5
9 a)discuss the apps od spread spectrum mobile communication
b)list the features of CDMA
OR
10 a) explain the applicatio of spread sprectrum in satellite communcation
b)explain the concept of spread spectrum in antijam military communcation

Earning:   Approval pending.