No. of Pages: 2

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

FIRST SEMESTER MTECH DEGREE EXAM - July 2018 ELECTRONICS AND
COMMUNICATION ENGINEERING SIGNAL PROCESSING OIEC6315: BIOMEDICAL SIGNAL
PROCESSING

Max. Marks : 60 marks
Answer any twofull questions from each part
Limit answers to the required points

PART A

1.(1) Propose an adaptive noise cancellation filter to remove maternal ECG from foetal ECG. Chest
lead ECG signal from mother may be used for reference. (6)
(ii) Discuss on objectives of biomedical signal analysis. (3)
2. (i) Design an optimal filter to remove noise from a signal, given that the signal and noise
processes are independent, stationary, random processes. You may assume the
"desired" or ideal characteristics of the uncorrupted signal as well as noise

characteristics to be known. (6)

(ii) Explain the role of Na+ — K - pump mechanism in the genesis ofbiomedical signals.
(3)

3. (i) Propose a time domain technique to remove random noise if you are given
realizations from a series of related events. How you will tackle the same situation if
only one realization ofthe same event is available. Make suitable assumptions wherever
you need.

(6)

(ii) Propose a method for analyzing the randomness in a noisy signal. (3)

(9 x 2 = 18 marks)
PART B

4. (i) Explain an algorithm for the real time detection of QRS complex in an ECG
waveforrn. (5)

(ii) Discuss on the pros and cons of synchronous averaging. (4)
5. (i) Develop a method for removing power line interference in an ECG signal which is less

sensitive to noise. (5) (ii) How muscle noise encountered during ECG acquisition can be

rectified using signal processing technique? (4)