Kannur University 2011-3rd Sem B.Tech Electronics and Communications Engineering Vester Engineering (Regular Including Part Time), PT 2K6 /2K6 EC 804 : WIRELESS MOBILE COMMUNICATION - Question Pa

VIII Semester B.Tech. Engineering Degree (Regular Including Part Time)
Examination, April 2011
(2007 Admin.)
Electronics and Communication


PT 2K6 /2K6 EC 804 : WIRELESS MOBILE COMMUNICATION





Time: three Hours Max. Marks: 100

Instructions : ans all questions.

1.a) discuss a few 3G standards which are used. [Marks 5]

b) discuss EDGE. What is the kind of modulation used in EDGE ? [Marks 5]

c) discuss what is frequency reuse. Why frequency reuse used in GSM and IS-95 technology ? [Marks 5]

d) discuss what is cell splitting.How can the capacity be improved with cell splitting ? [Marks 5]

e) discuss coherence time and coherence B.W. [Marks 5]

f) discuss various kinds of small scale fading. [Marks 5]

g) discuss Gold sequence. [Marks 5]

h) discuss how power control is done in CDMA system. [Marks 5]

2.A) discuss various standards used in 1G,2G,3G technology. discuss every
system with example.[Marks 15]

OR

B) Compare the architecture of GSM and GPRS. Draw the architecture of every one. [Marks 15]

3.A) discuss how capacity and coverage can be increased in cellular system. discuss all the
available methods. [Marks 15]

OR

B) discuss why handover is needed. discuss soft and hard handover. In which 1
we use soft and hard handover. [Marks 15]

4.A) discuss impulse response of a multipath channel. discuss various kinds of
small scale fading. [Marks 15]

OR

B) discuss free space propagation model,ground reflection model. [Marks 15]

5.A) discuss with block diagram RAKE receiver. discuss in detail every block. [Marks 15]

OR

B) discuss how PN-sequence are generated. discuss maximum length sequence
and gold sequence. [Marks 15]

Earning:   Approval pending.