APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER M.TECH DEGREE EXAMINATION, DECEMBER 2015 Electronics
and Communication Engineering (Applied Electronics And Instrumentation)
OIEC6105 Advanced Digital Signal Processing
Max. Marks * 60 Duration: 3 hrs

‘Answer any two questions from each part
PART A

1. a) A discrete time low pass filter is to be designed with the following specifications.
Maximally flat pass band and stop band
Passband ripple : -3 dB + 50.18,

Stop band attenuation : 5-2008 , 0.3511
i) Clearly show the design steps, using impulse invariance method (4) ii) Show the

location of poles in s-plane
ii)Give the expression for H(z) (2)

b) Explain how can you convert the above filter to a high pass filter with pass band edge
frequency 0.25m(2)

2. a) For the following multirate system

x(n) $2]

i) Express y(n) in terms of x(n) (2)
ii) Express in terrns of X(e")(2) iii) If x(nFa" u(n). Find y(n) for -3 n 4 (a=0.5) (1)

b) For the sampling rate converter shown sketchY (४८)

| | 03 50790)

Given H(e'’) | | ,0 151

1 2 2 7

3. a) Given that the ideal frequency response ofa low pass filter as
)=2e7" ൩൬