Thapar University 2007 B.E DIGITAL SIGNAL PROCESSING - Question Paper

Ql.

a]

The Z transform of a particular discrete time signal x(n) is expressed as

X(z) =

determine the x(n) using time-shifting property.

4

b)

Explain the different properties of region of convergence (ROC) of the z-transform

2

Q2.

Explain the difference between FT, DTFT, DFT and FFT.

3

Q3.

Obtain the DFT of delayed unit impulse 6 [n-n₀).

3

Q4.

Obtain the DITFFT of a sequence

^x lⁿHH-:'7⁰⁰-^0,0)

4

Q5.

Determine H(z) using the impulse invariance method for the system transfer function

1

^H~(s+0.5)(s²+0.5s + 2)

4

Q6.

a)

Sketch the frequency response of Butteiworth filter and explain its characteristics.

2

b)

What is frequency wrapping concept?

2