No. of Pages:2
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
7

FIRST SEMESTER M.IECH DEGREE EXAMINATION, DECEMBER 201
Electronics & Communication Engineering

Stream(s):

1 Microwave & Television Engineering
2. Signal Processing
3. Telecommunication Engineering

O1EC6205: Advanced Digital Communication

Answer any twofull questions
from each part Limit answers

to the required points.
Duration: 3 hours

Max. Marks: 60
PART A

1. Consider the signal set given below:
ost < 3

S2(t) = 2, 61

S3(t) = -2, 1 s
८ S 3 =Zo 5

ts 2
௨. Find the basis functions and Draw the constellation diagram. 4
b. Represent each signal using the set of basis functions and
find Euclidean 5 distance.
A BPSK system employs the signals:
0
5 t Tb

31 (८) = -—cos21Tfct, 0
0

S2(t) =
I'Vhere Ebis the bit energy and Tb is the bit duration.

Find the probability of error as a function of SNR as well as
9

Euclidean distance.
Consider the signal:

S(t) = (൫: 0527, 02137

0. otherwise

2.