NATIONAL INSTITUTE OF TECHNOLOGY, ROURKELA-8
END SEMESTER EXAMINATION, 2019
SESSION: 2019-20 (AUTUMN)
B.Tech 5th Semester
Subject code: BM 3603, Subject Name: Biomedical Signal Processing, Dept. Code: BM
No. of pages: 2
Full Marks: 50
Duration: 3 Hours
Answer All Questions
Figures at the right hand margin indicate marks
All parts of a question should be answered at one place.
Q No.
1.
Marks
A. Differentiate between FIR and IIR filters. Explain how to estimate the 4+6+4
order of FIR and IIR filters with example.
B. Explain methods of Analog to Digital filter approximations.
C. The transfer function of an Analog filter is given by
H(s) = 2/ [0.7+(s/4)]
Derive transfer function of a digital filter with cut off frequency 5 Hz
by Bilinear transformation and unit impulse variation methods. How
can you prevent frequency warping in Bilinear method
approximation?
2.
What are indices of HRV? An international athlete with 20 years of active 3+5+2+2
career is diagnosed to have sick sinus syndrome (slowing down of intrinsic
pace maker). You are given raw ECG data of the athlete of 2 minutes’
duration.
A. Detail a method of preprocessing and analysis of ECG data in steps
for deriving HRV indices.
B. Which parameters will give you better information and why?
C. What will be the most probable findings? Explain with respect to
autonomic regulation of heart and HRV indices.
3.
Make a pole-zero plot in z plane of following transfer functions
A. H(z) = (1+z-2)/ (1+z-1)
B. H(z) = (1-5z-1+6z-2) / (1+0.5z-1)
C. H(z) = 1-z-1+z-2-z-3
D. H (z) = (1-z-1)3
4.
Ram Prasad got a head injury during road traffic accident 2 weeks back. He 6
got recovered except a compromise in fine movements and postural control.
8
You are given raw EMG data. Write an algorithm to diagnose that he has
suffered from acute cerebral stroke.
5.
Transfer function of a digital filter is given by
4
-2
-2
(25-25z ) / (25-4z )
Derive and compare frequency response and phase response at points on
unit circle corresponding to DC and π/2
6.
Draw the signal flow diagram of following transfer functions
A. (1+z-1)/(1+z-1)
B. (1-z-2)/(1-2z-1+0.5z-2)
C. 0.7 (1-z-1+z-2-z-3)
6