No. of Pages: 2

APJ ABDUL TECHNOLOGICAL UNIVERSITY

FIRST SEMESTER MTECH DEGREE EXAM DECEMBER 2017
ELECTRONICS AND COMMUNICATION ENGINEERING
SIGNAL PROCESSING
OIEC631S: BIOMEDICAL SIGNAL PROCESSING

Max. Marks : 60 marks Duration:3Hrs
Answer any twofull questions from each part

Limit answers to the required points

PART A
1. (1) 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 of the same event is available. Make suitable assumptions
wherever you need. (6)
(11) Explain the various artifacts encountered while analyzing a biomedical signal. (3)
2. (i) Design a frequency-domain filter which has minimum computational complexity to
remove high frequency noise with minimal loss of signal components in the specified

pass-band given below. Cut off frequency fe— 40 Hz, Sampling frequency fs = 200 Hz.
Choose the order of the filter to be N = 4, Assume the data which are not given. (6)

(ii) Explain the objectives of biomedical signal analysis. (3)
3. (i) How adaptive filter theory can be used to remove maternal ECG artifact from fetal
ECG signal? (6)
(ii) Discuss on EEG rhythms, waves and transients. (3)
PART B

4. (i) How can you remove a periodic artifact with fundamental frequency 60 Hz and odd
harmonics at 180 Hz, 300 Hz, and 420 Hz from an ECG signal. Design a suitable fitter
to remove this artifact. Given sampling frequency fs 1,000 Hz. (5)