Amrita Vishwa Vidyapeetham 2009 B.Tech Electronics and Communications Engineering Digital Signal Processing 3rd internal - Question Paper

Amrita Vishwa Vidyapeetham

Amrita School of Engineering, Amritapuri

Missed Periodical Examination, April 2009

EE 322 Digital Signal Processing

S4 ECE

 

Time: 2 hours Maximum Marks: 50 (Answer all the questions)

1.      What is Dead-band? Calculate the deadband of the

 

(4 Marks)

2.      State the difference between Butterworth and Chebyshev approximations.

 

(4 Marks)

3.      Find the order of Kaiser Window used to design a low-pass filter with cutoff frequency , stop band ripple and transition bandwidth not 1arger than 0.117 Hz.

(4 Marks)

 

4.      The system function of a first order normalized low pass filter is given as .Obtain the system function of bandpass filter having pass band from 1 kHz to 2 kHz.

(4 Marks)

5.      Briefly explain the effects of finite word-length in digital filters.

(4 Marks)

 

6.      Consider the pole zero plot shown in fig below.

 

i. Find out the location of zeros if the above diagram symbolizes a linear phase FIR filter.

 

ii. Find the Transfer function of the filter.

 

(8      Marks)

7.      Design a 5 tap Hilbert transformer with the characteristic as shown: Use Rectangular window.

(10 marks)

 

8.      Design a digital Butterworth filter satisfying the constraints

with T= 1 sec using

(a)    Bilinear Transformation

(b)   Impulse invariant method.

 

(12 Marks)