No. of Pages: 2 6
AP} ABDUL KALAM TECHNOLOGICAL UNIVERSITY

FIRST SEMESTER M.TECH DEGREE EXAMINATION, DECEMBER 201 g

Branch: Electronics and Communication Engineering

Stream(s) :
| . Signal Processing
2. Microwave & TV Engineering
3. Optoelectronics
4. Telecommunication

Course Code & Name: OIEC6205 ADVANCED DIGITAL COMMUNICATION

Answer any hvofull questions from each part

Limit answers to the required points.

Max. Marks: 60 Duration: 3 hours
PARTA
1. Perform the Gram Schmidt orthogonalization of the given signals and thus obtainthe set (9) of
ortho-normal basis functions.
5, sf)
2 2
o 1 2 3 9 1 ;
117 ∙ FAG)
‏چم لہ‎
பிரா ‏کس‎ ” 2
0 t 2 ;
2. a. Explain the term power spectra and bandwidth efficiency.
b.Consider the signal (6)

S(t)={ (ATT) t cos2nfct ; OS t ST)
0: otherwise}

(i) Determine the impulse response of the matched filter for the signal.
(ii) Determine the output of the matched filter at FT.

(iii)suppose the signal S(t) is passed through a correlator that correlates the input S(t) with S(t).
Determine the value of correlator output at t=T. Compare your result with that in (ii).