Jaypee Institute of Information Technology (JIIT) 2008 B.E test 3: advcommsystem - Question Paper

Jaypec University of Information Technology

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Tast3-Advanced Communication Systems (Elective) (Q7MI1BC101)

For MTcrb And VTI Semester KCE ttudroM Time Ihr 30 rain; Mario 30, Nor-Dee 3008 AU quttttofu carry equal mart*

1.    A receiver u made up of die following (bur stages

(a) Stage 1 an antenna with a none temperature of 273K and 100m⁵, Poynting war magnitude - lO'^uW/m³, bandwidth x-lMHi (Boltimann'i >*statM.38 x 10"**W/^,ftK - Ut). (b) Stage 2 (Ain-20 dD and NF=6 (IB. (e> Siage 3 is 3 dl) lowy network and (d) Stage 419 m amplifier of gain-60 dB and

* ooue figure of 1$ dB

(i) Find the power of th <tBal and SNR at the input and output of rvnjr stage

(it) Repeat (i) with stage 3 removed

2.    Consider the parity coei&cieat matrix P matrix

ill

110

(a) Find the generator matrix C (b) Find all codenot ds corteaponding to all message words (c) Find H tlx parity check matrix, (d) Compute the syttdzuines corresponding to the received codewords 1001101 and 111 1000 Are these vahd codewtds?

3 Uang the Gr*m-5diroidl proceta of onhnormaUsatlon find the ortbonor-mal waveforms lor the wAvefoims given below:

(0 2 ~1 *8(0 1 t 1 *l(t) **(0 Z zm

1 : *    l I *

After doing co ibow bow Utse ortbooormal function* may be used in a bMfbond a>mmunbv*lk>n yctam

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Attachment: jaypee-institute-of-information-technology--jiit--2008-b-e-21265-1.jpg

Earning:   Approval pending.