Digital Signal Processing Questions and Answers, Set 18

Digital Signal Processing Questions and Answers

Q1. 

What kind of filter is an ideal Hilbert transformer?

Answer :  

All pass

Q2. 

In this section, we confine our attention to the design of FIR Hilbert transformers with h(n)=-h(M-1-n).

Answer :  

True

Q3. 

The ideal differentiator has which of the following unit sample responses?

Answer :  

Anti-symmetric

Q4. 

We need not relate the spectrum of y(m) to the spectrum of x(n) to obtain the frequency response characteristic of y(m).

Answer :  

False

Q5. 

The filter designs that contain maximum number of alternations are called as _____

Answer :  

Maximal ripple filters

Q6. 

If the filter has a symmetric unit sample response with M even, then what is the value of Q(ω)?

Answer : 

cos(ω/2)

Q7. 

At most, how many extremal frequencies can be there in the error function of an ideal low-pass filter?

Answer :  

L+3

Q8. 

In the Parks-McClellan program, the grid density for interpolating the error function is denoted by which of the following functions?

Answer :  

LGRID

Q9. 

Which of the following is introduced in the frequency sampling realization of the FIR filter?

Answer :  

Poles and zeros at equally spaced points on the unit circle

Q10. 

What is the peak side lobe (in dB) for a Hanning window?

Answer :  

-32

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