Digital Signal Processing Questions and Answers, Set 26

Digital Signal Processing Questions and Answers

Q1. 

Which of the following operations has to be performed to increase the sampling rate by an integer factor I?

Answer :  

Interpolating I-1 new samples

Q2. 

Where do the poles of the transfer function of the normalized low-pass Butterworth filter exist?

Answer :  

On the unit circle

Q3. 

What is the cutoff frequency of a normalized filter?

Answer :  

1 rad/sec

Q4. 

We cannot choose any arbitrary function for the errors in magnitude and delay.

Answer :  

False

Q5. The 

Wiener filter is an FIR least-squares inverse filter.

Answer :  

True

Q6. 

What should be the desired response for an optimum Wiener filter to be an approximate inverse filter?

Answer :  

δ(n)

Q7. 

The foregoing approach for determining the poles and zeros of H(z) is sometimes called Prony’s method.

Answer :  

True

Q8. 

The degree to which the design technique produces acceptable filter designs depends in part on the number of filter coefficients selected.

Answer : 

True

Q9. 

The unit circle must be mapped outside the unit circle.

Answer :  

False

Q10. 

In which of the following transformations does it not matter whether the frequency transformation is performed in the analog domain or in the frequency domain?

Answer :  

Bilinear transformation

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